DELL Technologies PYWGV All in One Computer New Retail Box Owner’s Manual

PYWGV All in One Computer New Retail Box

Specifications

• Product Name: OptiPlex All-in-One Plus 7420
• Regulatory Model: W31C
• Regulatory Type: W31C002
• Release Date: March 2024
• Revision: A01

Product Information

Views of OptiPlex All-in-One Plus 7420

Right View

1. USB 3.2 Gen 2 (10 Gbps) with PowerShare
port
Connect devices such as external storage devices, printers, and
external displays. Provides a data transfer speed of up to 10 Gbps.
Supports Power Delivery that enables two-way power supply between
devices. Provides up to 10 W power output that enables faster
charging.

NOTE: PowerShare enables you to charge your USB devices
even when your computer is turned off.

NOTE: If a USB device is connected to the PowerShare
port before the computer is turned off or in hibernate state, you
must disconnect and connect it again to enable charging.

Left View

1. Storage drive activity light
The activity light turns on when the computer reads from or writes
to storage drives.

2. Universal audio port
Connect headphones or a headset (headphone and microphone
combo).

Product Usage Instructions

Setting Up Your Computer

Follow the instructions in Chapter 2 of the manual to properly
set up your OptiPlex All-in-One Plus 7420.

Power-Supply Unit

To remove or install the power-supply unit, refer to the
respective sections in Chapter 4 of the manual.

Software

Refer to Chapter 7 for information on the operating system,
drivers, and downloads related to your OptiPlex All-in-One Plus
7420.

System Setup Passwords

If you need to delete or change an existing system setup
password, follow the steps outlined in Chapter 5 of the manual.

Getting Help and Support

If you require assistance or need to contact Dell for any
reason, refer to Chapter 10 of the manual for guidance.

FAQ

Q: How do I enable charging on the PowerShare port?

A: If a USB device is connected to the PowerShare port before
the computer is turned off or in hibernate state, you must
disconnect and connect it again to enable charging.

OptiPlex All-in-One Plus 7420
Owner’s Manual
Regulatory Model: W31C Regulatory Type: W31C002 March 2024 Rev. A01

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2024 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

Contents

Chapter 1: Views of OptiPlex All-in-One Plus 7420……………………………………………………………….7 Right………………………………………………………………………………………………………………………………………………………………….7 Left……………………………………………………………………………………………………………………………………………………………………8 Front………………………………………………………………………………………………………………………………………………………………… 9 Retractable camera ………………………………………………………………………………………………………………………………………. 10 Bottom……………………………………………………………………………………………………………………………………………………………. 12 Back panel……………………………………………………………………………………………………………………………………………………….13 Service Tag……………………………………………………………………………………………………………………………………………………..14
Chapter 2: Set up your computer……………………………………………………………………………………. 15
Chapter 3: Specifications of OptiPlex All-in-One Plus 7420………………………………………………… 20 Dimensions and weight…………………………………………………………………………………………………………………………………. 20 Processor………………………………………………………………………………………………………………………………………………………. 20 Chipset…………………………………………………………………………………………………………………………………………………………….21 Operating system………………………………………………………………………………………………………………………………………….. 22 Memory………………………………………………………………………………………………………………………………………………………….. 22 External ports…………………………………………………………………………………………………………………………………………………23 Internal slots………………………………………………………………………………………………………………………………………………….. 23 Ethernet………………………………………………………………………………………………………………………………………………………….24 Wireless module…………………………………………………………………………………………………………………………………………….. 24 Audio……………………………………………………………………………………………………………………………………………………………….24 Storage………………………………………………………………………………………………………………………………………………………….. 25 Media- card reader………………………………………………………………………………………………………………………………………….25 Camera……………………………………………………………………………………………………………………………………………………………26 Power ratings………………………………………………………………………………………………………………………………………………… 26 Power supply connector……………………………………………………………………………………………………………………………….. 27 Display……………………………………………………………………………………………………………………………………………………………. 27 Dell ComfortView………………………………………………………………………………………………………………………………………….. 28 GPU–Integrated………………………………………………………………………………………………………………………………………….. 29 GPU–Discrete……………………………………………………………………………………………………………………………………………… 29 Hardware security…………………………………………………………………………………………………………………………………………. 30 Environmental……………………………………………………………………………………………………………………………………………….. 30 Operating and storage environment……………………………………………………………………………………………………………..30
Chapter 4: Working inside your computer…………………………………………………………………………32 Safety instructions………………………………………………………………………………………………………………………………………… 32 Before working inside your computer………………………………………………………………………………………………………32 Safety precautions…………………………………………………………………………………………………………………………………… 33 Electrostatic discharge–ESD protection………………………………………………………………………………………………. 33 ESD Field Service kit ………………………………………………………………………………………………………………………………. 34 Transporting sensitive components…………………………………………………………………………………………………………35 After working inside your computer……………………………………………………………………………………………………….. 35 BitLocker………………………………………………………………………………………………………………………………………………….. 35

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Recommended tools……………………………………………………………………………………………………………………………………… 35 Screw list………………………………………………………………………………………………………………………………………………………..36 Major components of your OptiPlex All-in-One Plus 7420…………………………………………………………………………..37
Chapter 5: Removing and installing Customer Replaceable Units (CRUs)……………………………… 40 Stand……………………………………………………………………………………………………………………………………………………………… 40 Removing the stand………………………………………………………………………………………………………………………………….40 Installing the stand…………………………………………………………………………………………………………………………………….41 Back cover…………………………………………………………………………………………………………………………………………………….. 43 Removing the back cover…………………………………………………………………………………………………………………………43 Installing the back cover………………………………………………………………………………………………………………………….. 43 Memory………………………………………………………………………………………………………………………………………………………….. 44 Removing the memory…………………………………………………………………………………………………………………………….. 44 Installing the memory………………………………………………………………………………………………………………………………. 45 Graphics card………………………………………………………………………………………………………………………………………………… 47 Removing the graphics card……………………………………………………………………………………………………………………. 47 Installing the graphics card……………………………………………………………………………………………………………………… 49 System-board shield……………………………………………………………………………………………………………………………………….51 Removing the system-board shield…………………………………………………………………………………………………………. 51 Installing the system-board shield……………………………………………………………………………………………………………52 Wireless card…………………………………………………………………………………………………………………………………………………. 53 Removing the wireless card……………………………………………………………………………………………………………………..53 Installing the wireless card………………………………………………………………………………………………………………………. 54 Solid-state drive in M.2 slot 0……………………………………………………………………………………………………………………….56 Removing the M.2 2230 solid-state drive in M.2 slot 0………………………………………………………………………… 56 Installing the M.2 2230 solid-state drive in M.2 slot 0…………………………………………………………………………… 57 Removing the M.2 2280 solid-state drive in M.2 slot 0………………………………………………………………………….57 Installing the M.2 2280 solid-state drive in M.2 slot 0……………………………………………………………………………58 Location of the screw mount on M.2 slot 0…………………………………………………………………………………………… 59 Solid-state drive in M.2 slot 1………………………………………………………………………………………………………………………..60 Removing the M.2 2230 solid-state drive in M.2 slot 1…………………………………………………………………………. 60 Installing the M.2 2230 solid-state drive in M.2 slot 1……………………………………………………………………………. 61 Removing the M.2 2280 solid-state drive in M.2 slot 1…………………………………………………………………………. 62 Installing the M.2 2280 solid-state drive in M.2 slot 1…………………………………………………………………………….63 Location of the screw mount on M.2 slot 1……………………………………………………………………………………………. 64 Coin-cell battery…………………………………………………………………………………………………………………………………………….65 Removing the coin-cell battery………………………………………………………………………………………………………………..65 Installing the coin-cell battery…………………………………………………………………………………………………………………. 66 I/O cover……………………………………………………………………………………………………………………………………………………….. 67 Removing the I/O cover………………………………………………………………………………………………………………………….. 67 Installing the I/O cover……………………………………………………………………………………………………………………………. 68 Bottom cover………………………………………………………………………………………………………………………………………………… 69 Removing the bottom cover…………………………………………………………………………………………………………………….69 Installing the bottom cover……………………………………………………………………………………………………………………… 70 Retractable- camera assembly………………………………………………………………………………………………………………………..71 Removing the retractable-camera assembly…………………………………………………………………………………………… 71 Installing the retractable-camera assembly……………………………………………………………………………………………..72 Fan…………………………………………………………………………………………………………………………………………………………………. 74 Removing the fan…………………………………………………………………………………………………………………………………….. 74 Installing the fan………………………………………………………………………………………………………………………………………. 75

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Contents

Power-supply unit…………………………………………………………………………………………………………………………………………. 76 Removing the power-supply unit……………………………………………………………………………………………………………..76 Installing the power-supply unit………………………………………………………………………………………………………………. 77
Chapter 6: Removing and installing Field Replaceable Units (FRUs)…………………………………….. 79 Power-supply fan………………………………………………………………………………………………………………………………………….. 79 Removing the power-supply fan……………………………………………………………………………………………………………… 79 Installing the power-supply fan……………………………………………………………………………………………………………….. 82 I/O bracket……………………………………………………………………………………………………………………………………………………. 85 Removing the I/O bracket………………………………………………………………………………………………………………………. 85 Installing the I/O bracket………………………………………………………………………………………………………………………….86 Speakers………………………………………………………………………………………………………………………………………………………… 87 Removing the speakers……………………………………………………………………………………………………………………………. 87 Installing the speakers……………………………………………………………………………………………………………………………… 88 Heat sink…………………………………………………………………………………………………………………………………………………………89 Removing the heat sink…………………………………………………………………………………………………………………………… 89 Installing the heat sink…………………………………………………………………………………………………………………………….. 90 Processor……………………………………………………………………………………………………………………………………………………….. 91 Removing the processor……………………………………………………………………………………………………………………………91 Installing the processor……………………………………………………………………………………………………………………………. 92 System board………………………………………………………………………………………………………………………………………………… 94 Removing the system board……………………………………………………………………………………………………………………. 94 Installing the system board……………………………………………………………………………………………………………………… 98 Power-button and I/O board………………………………………………………………………………………………………………………..101 Removing the power-button and I/O board………………………………………………………………………………………….. 101 Installing the power-button and I/O board…………………………………………………………………………………………… 102 Audio board………………………………………………………………………………………………………………………………………………….. 104 Removing the audio board………………………………………………………………………………………………………………………104 Installing the audio board………………………………………………………………………………………………………………………..105 Display-assembly base…………………………………………………………………………………………………………………………………. 107 Removing the display-assembly base……………………………………………………………………………………………………..107 Installing the display-assembly base……………………………………………………………………………………………………….108
Chapter 7: Software……………………………………………………………………………………………………. 110 Operating system…………………………………………………………………………………………………………………………………………. 110 Drivers and downloads…………………………………………………………………………………………………………………………………. 110
Chapter 8: BIOS Setup………………………………………………………………………………………………….111 Entering BIOS setup program………………………………………………………………………………………………………………………. 111 Navigation keys………………………………………………………………………………………………………………………………………………111 F12 One Time Boot menu……………………………………………………………………………………………………………………………… 111 System setup options…………………………………………………………………………………………………………………………………… 112 Updating the BIOS………………………………………………………………………………………………………………………………………. 125 Updating the BIOS in Windows……………………………………………………………………………………………………………… 125 Updating the BIOS using the USB drive in Windows……………………………………………………………………………. 125 Updating the BIOS in Linux and Ubuntu……………………………………………………………………………………………….. 125 Updating the BIOS from the F12 One Time Boot menu……………………………………………………………………….. 125 System and setup password……………………………………………………………………………………………………………………….. 126 Assigning a System Setup password…………………………………………………………………………………………………….. 126

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Deleting or changing an existing system setup password……………………………………………………………………. 127 Clearing CMOS settings……………………………………………………………………………………………………………………………….127 Clearing BIOS (System Setup) and System passwords…………………………………………………………………………….. 127
Chapter 9: Troubleshooting…………………………………………………………………………………………. 129 Dell SupportAssist Pre-boot System Performance Check diagnostics…………………………………………………….. 129 Running the SupportAssist Pre-Boot System Performance Check…………………………………………………….. 129 Power-Supply Unit Built-in Self-Test ………………………………………………………………………………………………………… 129 System-diagnostic lights………………………………………………………………………………………………………………………………130 Recovering the operating system………………………………………………………………………………………………………………..130 Real Time Clock–RTC reset………………………………………………………………………………………………………………………..131 Backup media and recovery options……………………………………………………………………………………………………………. 131 Wi-Fi power cycle………………………………………………………………………………………………………………………………………….131
Chapter 10: Getting help and contacting Dell………………………………………………………………….. 132

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Contents

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Views of OptiPlex All-in-One Plus 7420
Right

Figure 1. Right view of OptiPlex All-in-One Plus 7420
1. USB 3.2 Gen 2 (10 Gbps) with PowerShare port Connect devices such as external storage devices, printers, and external displays. Provides a data transfer speed of up to 10 Gbps. Supports Power Delivery that enables two-way power supply between devices. Provides up to 10 W power output that enables faster charging.
NOTE: PowerShare enables you to charge your USB devices even when your computer is turned off.
NOTE: If a USB device is connected to the PowerShare port before the computer is turned off or in hibernate state, you must disconnect and connect it again to enable charging.

Views of OptiPlex All-in-One Plus 7420

7

Left

Figure 2. Left view of OptiPlex All-in-One Plus 7420
1. Storage drive activity light The activity light turns on when the computer reads from or writes to storage drives.
2. Universal audio port Connect headphones or a headset (headphone and microphone combo).

8

Views of OptiPlex All-in-One Plus 7420

Front

Figure 3. Front view of OptiPlex All-in-One Plus 7420
1. Left microphone Provides digital sound input for audio recording and voice calls.
2. Right microphone Provides digital sound input for audio recording and voice calls.
3. Retractable camera Enables you to video-chat, capture photos, and record videos. To protect your privacy, this camera can be retracted when it is not in use.
4. Right speaker Provides audio output.
5. Left speaker Provides audio output.

Views of OptiPlex All-in-One Plus 7420

9

Retractable camera
Locating the retractable camera
NOTE: To access your retractable camera, press down on the retractable camera located at the top of your computer. To conceal your retractable camera and protect your privacy, press down on the retractable camera until it clicks into place.

Figure 4. Locating the retractable camera
NOTE: Depending on the configuration ordered your computer may have a 5MP RGB

• Infrared camera or an FHD RGB camera.

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Views of OptiPlex All-in-One Plus 7420

Retractable camera for computers shipped with a 5MP RGB + Infrared camera
Figure 5. Retractable camera for computers shipped with a 5MP RGB + Infrared camera 1. Infrared emitter
Emits infrared light, which enables the infrared camera to sense and track motion. 2. Infrared camera
Enhances security when paired with Windows Hello face authentication. 3. Camera
Enables you to video chat, capture photos, and record videos. 4. Infrared emitter
Emits infrared light, which enables the infrared camera to sense and track motion. 5. Camera-status light
Turns on when the camera is in use.

Views of OptiPlex All-in-One Plus 7420

11

Retractable camera for computers shipped with an FHD RGB camera
Figure 6. Retractable camera for computers shipped with an FHD RGB camera 1. Camera
Enables you to video chat, capture photos, and record videos. 2. Camera-status light
Turns on when the camera is in use.
Bottom

Figure 7. Bottom view of OptiPlex All-in-One Plus 7420

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Views of OptiPlex All-in-One Plus 7420

1. Stand/VESA mount location Allows for the installation of a 100 mm x 100 mm screw pitch VESA connection for use in standard environmental conditions, or one of the stands offered by Dell for your OptiPlex All-in-One Plus 7420.
2. Service Tag label The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your computer and access warranty information.
3. Back panel Connect USB, audio, video, and other devices.
4. SD-card slot Insert an SD card here to read from and write to the SD card.
5. USB 3.2 Gen 2×2 (20 Gbps) Type C port Connect devices such as external storage devices and printers. Provides a data transfer rate of up to 20 Gbps.
6. Display Built-in Self Test (BIST)/Display input button Press and hold this button until your computer initiates the Built-in Self Test (BIST). Press to switch display input to and from the device connected to the HDMI-in port on the back panel.
7. Power button Press to turn on the computer if it is turned off, in sleep state, or in hibernate state. When the computer is turned on, press the power button to put the computer into sleep state; press and hold the power button for 10 seconds to force shut-down the computer. NOTE: You can customize the power-button behavior in Windows.
Back panel

Figure 8. Back panel view of OptiPlex All-in-One Plus 7420
1. HDMI-in 1.4b port Connect a gaming console, Blu-ray player, or other HDMI- out enabled device.
2. HDMI-out 2.1 port Connect to a TV, external display or another HDMI-in enabled device. Provides video and audio output and supports video output of up to 4096 x 2160 at 60 Hz.
3. DisplayPort ++ 1.4a Connect an external display or a projector. Can support video output of up to 5120 x 3200 at 60 Hz.
4. Network port Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access.
5. USB 3.2 Gen 1 (5 Gbps) with SmartPower On port

Views of OptiPlex All-in-One Plus 7420

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Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 5 Gbps. NOTE: When USB wake is enabled in the BIOS the computer will power on or wake from hibernation when a USB mouse or keyboard that is connected to this port is used.
6. USB 3.2 Gen 1 (5 Gbps) with SmartPower On port Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 5 Gbps. NOTE: When USB wake is enabled in the BIOS the computer will power on or wake from hibernation when a USB mouse or keyboard that is connected to this port is used.
7. USB 3.2 Gen 2 (10 Gbps) port Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 10 Gbps.
8. USB 3.2 Gen 2 (10 Gbps) port Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 10 Gbps.
9. USB 3.2 Gen 2 (10 Gbps) port Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 10 Gbps.
10. Audio line-out port, retaskable Connect an audio device.
11. Power-cable connector Connect a power cable to provide power to your computer.
12. Power-supply diagnostics light Indicates the power-supply state.
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in your computer and access warranty information.

Figure 9. Service tag location of your OptiPlex All-in-One Plus 7420

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Views of OptiPlex All-in-One Plus 7420

2
Set up your computer
Steps 1. Install the stand base on the stand.
NOTE: Stand base installation for all stand configurations offered for your computer is exactly the same. Follow the procedure shown in the image to install the stand base on the stand.
Figure 10. Installing the stand base 2. Set up the stand by inserting it into the slot on the back cover until it snaps into place.
NOTE: Stand installation for all stand configurations offered for your computer is exactly the same. Follow the procedure shown in the image to install the stand on your computer.

Set up your computer

15

Figure 11. Installing the stand
3. Set up the keyboard and mouse. NOTE: For setup instructions, see the documentation shipped with the keyboard and mouse.
4. Connect the power cable.

16

Set up your computer

Figure 12. Connecting the power cable 5. Press the power button to turn on your computer.

Set up your computer

17

Figure 13. Pressing the power button
6. Finish the operating system setup. For Ubuntu: Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, see the knowledge base articles 000131655 and 000131676 at www.dell.com/support.
For Windows: Follow the on-screen instructions to complete the setup. When setting up, Dell recommends that you: Connect to a network for Windows updates.
NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when prompted. If connected to the internet, sign-in with or create a Microsoft account. If not connected to the internet, create an offline account. NOTE: Depending on the version of Windows installed an online connection may be required to set up your computer in order to sign-in to your Microsoft account or to create a Microsoft account. On the Support and Protection screen, enter your contact details.
7. Locate and use Dell apps from the Windows Start menu–Recommended

18

Set up your computer

Table 1. Locate Dell apps

Resources

Description

Dell Update
Updates your computer with critical fixes and latest device drivers as they become available. For more information about using Dell Update, see the product guides and third-party license documents at www.dell.com/support.

Dell Digital Delivery
Download software applications, which are purchased but not preinstalled on your computer. For more information about using Dell Digital Delivery, search in the Knowledge Base Resource at www.dell.com/support.

SupportAssist
SupportAssist proactively and predictively identifies hardware and software issues on your computer and automates the engagement process with Dell Technical support. It addresses performance and stabilization issues, prevents security threats, monitors, and detects hardware failures. For more information, see SupportAssist for Home PCs User’s Guide at www.dell.com/ support/home/product-support/product/dell-supportassist-pcs-tablets/docs.
NOTE: In SupportAssist, click the warranty expiry date to renew or upgrade your warranty.

Set up your computer

19

3

Specifications of OptiPlex All-in-One Plus 7420

Dimensions and weight

The following table lists the height, width, depth, and weight of your OptiPlex All-in-One Plus 7420.

Table 2. Dimensions and weight Description Height:
Front height

Values 354.30 mm (13.95 in.)

Rear height

354.30 mm (13.95 in.)

Width

540 mm (21.26 in.)

Depth

57.90 mm (2.28 in.)

Weight NOTE: The weight of your computer depends on the configuration that is ordered and manufacturing variability.

Minimum: 6.33 kg (13.95 lb) Maximum: 6.76 kg (14.90 lb)

Processor
The following table lists the details of the processors supported by your OptiPlex All-in-One Plus 7420.

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Specifications of OptiPlex All-in-One Plus 7420

Table 3. Processor

Description Processor type

Option one Intel Core i3 14100

Processor wattage 60 W

Processor total

4

core count

Performance-cores 4

Efficient-cores

None

Processor total

8

thread counts

Option two Intel Core i5 14500 vPro
65 W
14

Option three Intel Core i5 14600 vPro
65 W
14

6

6

8

8

20

20

Option four

Option five

Intel Core i7 14700 Intel Core i9

vPro

14900 vPro

65 W

65 W

20

24

8

8

12

16

28

32

NOTE: Intel® Hyper-Threading Technology is only available on Performance- cores.

Processor speed Up to 4.70 GHz

Performance-cores frequency

Processor base 3.50 GHz frequency

Maximum turbo frequency

4.70 GHz

Efficient-cores frequency

Processor base Not applicable frequency

Maximum turbo frequency

Not applicable

Processor cache 12 MB

Integrated graphics

Intel UHD Graphics 730

Up to 5 GHz
2.60 GHz 5 GHz
1.90 GHz 3.70 GHz 24 MB Intel UHD Graphics 770

Up to 5.20 GHz
2.70 GHz 5.20 GHz
2 GHz 3.90 GHz 24 MB Intel UHD Graphics 770

Up to 5.40 GHz, Turbo Max Boost

Up to 5.60 GHz, Turbo Max Boost

2.10 GHz 5.30 GHz

2 GHz 5.40 GHz

1.50 GHz 4.20 GHz

1.50 GHz 4.30 GHz

33 MB

36 MB

Intel UHD Graphics Intel UHD

770

Graphics 770

Chipset

The following table lists the details of the chipset that is supported for your OptiPlex All-in-One Plus 7420.

Table 4. Chipset Description Chipset

Values Q670

Processor

Intel Core i3/i5 vPro/i7 vPro/i9 vPro

DRAM bus width

64-bit

Flash EPROM

32 MB + 16 MB

PCIe bus

Up to Gen4

Specifications of OptiPlex All-in-One Plus 7420

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Operating system
Your OptiPlex All-in-One Plus 7420 supports the following operating systems:
Windows 11 Home, 64-bit Windows 11 Pro, 64-bit Windows 11 Pro National Education, 64-bit Ubuntu Linux 22.04 LTS, 64-bit
For more information about Dell OS Recovery image, see How to Download and Use the Dell OS Recovery Image in Microsoft Windows, at Dell support site.
Commercial platform Windows 11 N-2 and 5-year operating system supportability:
All newly introduced 2019 and later commercial platforms (Latitude, OptiPlex, and Dell Precision) will qualify and ship with the most current factory installed Semi-Annual Channel Windows 11 version (N) and qualify (but not ship) the previous two versions (N-1, N-2). The OptiPlex All-in-One Plus 7420 will RTS with Windows 11 version v23H2 at time of launch, and this version will determine the N-2 versions that are initially qualified for this platform.
For future versions of Windows 11, Dell continues to test the commercial platform with coming Windows 11 releases during device production and for five years post-production, including both fall and spring releases from Microsoft.
For additional information about N-2 and 5-year Windows operating system supportability, see the Dell Windows as a Service (WaaS), at Dell support site.
EOML 411
The OptiPlex All-in-One Plus 7420 continues to test the coming Semi-Annual Channel Windows 11 version releases for five years post-production, including both fall and spring releases from Microsoft.

Memory

The following table lists the memory specifications of your OptiPlex All-in- One Plus 7420.

Table 5. Memory specifications Description Memory slots

Values Two SoDIMM slots

Memory type

DDR5

Memory speed Maximum memory configuration

4800 MT/s 5600 MT/s
64 GB

Minimum memory configuration

8 GB

Memory size per slot

8 GB, 16 GB, or 32 GB

Memory configurations supported

For computers shipped with an Intel Core i3 14100/i5 14500 vPro processor:
8 GB: 1 x 8 GB, DDR5, 4800 MT/s, single-channel 16 GB: 1 x 16 GB, DDR5, 4800 MT/s, single-channel 16 GB: 2 x 8 GB, DDR5, 4800 MT/s, dual-channel 32 GB: 1 x 32 GB, DDR5, 4800 MT/s, single-channel 32 GB: 2 x 16 GB, DDR5, 4800 MT/s, dual-channel 64 GB: 2 x 32 GB, DDR5, 4800 MT/s, dual-channel
For computers shipped with an Intel Core i5 14600 vPro/i7 14700 vPro/i9 14900 vPro processor:
8 GB: 1 x 8 GB, DDR5, 5600 MT/s, single-channel 16 GB: 1 x 16 GB, DDR5, 5600 MT/s, single-channel

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Specifications of OptiPlex All-in-One Plus 7420

Table 5. Memory specifications (continued) Description

Values
16 GB: 2 x 8 GB, DDR5, 5600 MT/s, dual-channel 32 GB: 1 x 32 GB, DDR5, 5600 MT/s, single-channel 32 GB: 2 x 16 GB, DDR5, 5600 MT/s, dual-channel 64 GB: 2 x 32 GB, DDR5, 5600 MT/s, dual-channel

External ports

The following table lists the external ports of your OptiPlex All-in-One Plus 7420.

Table 6. External ports Description Network port

Values One RJ45 Ethernet Port 10/100/1000 Mbps

USB ports

One USB 3.2 Gen 2 (10 Gbps) with PowerShare port One USB 3.2 Gen 2×2 (20 Gbps) Type-C port Three USB 3.2 Gen 2 (10 Gbps) ports Two USB 3.2 Gen 1 (5 Gbps) with SmartPower On ports

Audio port

One universal audio port One audio line-out port, retaskable

Video port Media-card reader

One DisplayPort++ 1.4a port One HDMI-in 1.4b port One HDMI-out 2.1 port
One SD-card slot

Power-adapter port

One power-cable connector

Security-cable slot

One security-cable slot (3 mm x 7 mm, T-Bar design)

Internal slots

The following table lists the internal slots of your OptiPlex All-in-One Plus 7420.

Table 7. Internal slots Description M.2

Values
One M.2 2230 slot for WiFi and Bluetooth combo card Two M.2 2230/2280 slots for solid-state drive
NOTE: To learn more about the features of different types of M.2 cards, search in the Knowledge Base Resource at www.dell.com/support.

Specifications of OptiPlex All-in-One Plus 7420

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Ethernet

The following table lists the wired Ethernet Local Area Network (LAN) specifications of your OptiPlex All-in-One Plus 7420.

Table 8. Ethernet specifications Description Model number

Values Intel i219-LM

Transfer rate

10/100/1000 Mbps

Wireless module

The following table lists the Wireless Local Area Network (WLAN) module specifications of your OptiPlex All-in-One Plus 7420.

Table 9. Wireless module specifications

Description

Option one

Model number

AX201

Option two Intel AX211

Option three Realtek RTL8852BE

Transfer rate

Up to 2400 Mbps

Up to 2400 Mbps

Up to 1201 Mbps

Frequency bands supported 2.4 GHz/5 GHz

2.4 GHz/5 GHz/6 GHz

2.4 GHz/5 GHz

Wireless standards

Wi-Fi 802.11a/b/g Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6 (WiFi 802.11ax)

Wi-Fi 802.11a/b/g Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6E (WiFi 802.11ax)

Wi-Fi 802.11a/b/g Wi-Fi 4 (Wi-Fi 802.11n) Wi-Fi 5 (Wi-Fi 802.11ac) Wi-Fi 6 (WiFi 802.11ax)

Encryption

64-bit/128-bit WEP AES-CCMP TKIP

64-bit/128-bit WEP AES-CCMP TKIP

64-bit/128-bit WEP AES-CCMP TKIP

Bluetooth wireless card

Bluetooth 5.2

Bluetooth 5.3

Bluetooth 5.3

NOTE: The version of the Bluetooth wireless card may vary depending on the operating system that is installed on your computer.

Audio

The following table lists the audio specifications of your OptiPlex All-in-One Plus 7420.

Table 10. Audio specifications Description Audio controller

Values Realtek ALC3289

Stereo conversion

Supported

Internal audio interface

High definition audio interface

External audio interface Number of speakers

One universal audio port One audio line-out port, retaskable
Two stereo speakers

24

Specifications of OptiPlex All-in-One Plus 7420

Table 10. Audio specifications (continued) Description Internal-speaker amplifier

External volume controls

Speaker output:

Average speaker output

Peak speaker output

Subwoofer output

Microphone

Values Supported, Realtek Amplifier ALC1302 Not supported
5 W 6 W Not supported Two microphones in the retractable-camera assembly

Storage

This section lists the storage options on your OptiPlex All-in-One Plus 7420.
Your OptiPlex All-in-One Plus 7420 supports one of the following storage configurations: One M.2 2230/2280 solid-state drive Up to two M.2 2230/2280 solid-state drives The primary drive of your OptiPlex All-in-One Plus 7420 varies with the storage configuration. For computers the primary drive is the M.2 drive where the operating system is installed.

Table 11. Storage specifications Storage type M.2 2230 solid-state drive, Class 25

Interface type PCIe Gen4 x4 NVMe, up to 64 Gbps

Capacity Up to 2 TB

M.2 2230 solid-state drive, Class 35

PCIe Gen4 x4 NVMe, up to 64 Gbps

Up to 1 TB

M.2 2280 solid-state drive, Class 40

PCIe Gen4 x4 NVMe, up to 64 Gbps

Up to 2 TB

M.2 2230 solid-state drive, selfencrypting, Class 35

PCIe Gen4 x4 NVMe, up to 64 Gbps

Up to 256 GB

M.2 2280 solid-state drive, selfencrypting, Class 40

PCIe Gen4 x4 NVMe, up to 64 Gbps

Up to 512 GB

Media-card reader

The following table lists the media cards that are supported on your OptiPlex All-in-One Plus 7420.

Table 12. Media-card reader specifications Description Media-card type
Media-cards supported

Values
One SD-card slot
Secure Digital (SD) Secure Digital High Capacity (SDHC) Secure Digital Extended Capacity (SDXC)

NOTE: The maximum capacity supported by the media-card reader varies depending on the standard of the media card that is installed on your computer.

Specifications of OptiPlex All-in-One Plus 7420

25

Camera

The following table lists the camera specifications of your OptiPlex All-in- One Plus 7420.

Table 13. Camera specifications Description Number of cameras

Values One

Camera type Camera location

FHD RGB camera 5MP RGB + Infrared camera
Retractable camera

Camera sensor type

CMOS sensor technology

Camera resolution: Still image
Video
Infrared camera resolution: Still image

FHD RGB Camera: 2.07 megapixels 5MP RGB Camera: 4.92 megapixels FHD RGB Camera: 1920 x 1080 (FHD) at 30 fps 5MP RGB Camera: 2560 x 1920 (5MP) at 30 fps
0.23 megapixel, only on computers with an infrared camera

Video

640 x 360 (nHD) at 30 fps, only on computers with an infrared camera

Diagonal viewing angle: Camera
Infrared camera

FHD RGB Camera: 82 degrees 5MP RGB Camera: 85.90 degrees
76.10 degrees, only on computers with an infrared camera

Power ratings

The following table lists the power rating specifications of OptiPlex All-in- One Plus 7420.

Table 14. Power ratings Description Type

Option one

Option two

160 W internal power supply unit (PSU), 240 W internal power supply unit (PSU),

85% efficient, 80 Plus Bronze

92% efficient, 80 Plus Platinum

Input voltage

90 VAC­264 VAC

90 VAC­264 VAC

Input frequency

47 Hz­63 Hz

47 Hz­63 Hz

Input current (maximum)

2.80 A

3.80 A

Output current (continuous)

Operating:
19.50 VA: 7 A 19.50 VB: 5 A Standby:

Operating:
19.50 VA: 8 A 19.50 VB: 9 A Standby:

26

Specifications of OptiPlex All-in-One Plus 7420

Table 14. Power ratings (continued)

Description

Option one

19.50 VA: 0.50 A 19.50 VB: 1.75 A

Rated output voltage

19.50 VA 19.50 VB

Temperature range: Operating

5°C to 42°C (41°F to 107.6°F)

Storage

-40°C to 70°C (-40°F to 158°F)

Option two 19.50 VA: 0.50 A 19.50 VB: 1.75 A 19.50 VA 19.50 VB
5°C to 42°C (41°F to 107.6°F) -40°C to 70°C (-40°F to 158°F)

Power supply connector

The following table lists the Power supply connector specifications of your OptiPlex All-in-One Plus 7420.

Table 15. Power supply connector Power supply 160 W internal power supply unit (PSU), 80 Plus Bronze
240 W internal power supply unit (PSU), 80 Plus Platinum

Connectors
One 8-pin connector for processor One 6-pin connector for system board One 6-pin connector for control signal One 2-pin connector for LED
One 8-pin connector for processor One 6-pin connector for system board One 6-pin connector for control signal One 2-pin connector for LED

Display

The following table lists the display specifications of your OptiPlex All-in- One Plus 7420.

Table 16. Display specifications Description Display type

Option one

Option two

Full High Definition (FHD), ComfortView Full High Definition (FHD), ComfortView

Plus

Plus

Touch options

No

Touch support, with 10 touch points

Display-panel technology

In-Plane Switching (IPS)

In-Plane Switching (IPS)

Display-panel dimensions (active area): Height

296.46 mm (11.67 in.)

296.46 mm (11.67 in.)

Width

527.04 mm (20.75 in.)

527.04 mm (20.75 in.)

Diagonal

604.70 mm (23.81 in.)

604.70 mm (23.81 in.)

Display-panel native resolution

1920 x 1080

1920 x 1080

Luminance (typical)

250 nits

300 nits

Specifications of OptiPlex All-in-One Plus 7420

27

Table 16. Display specifications (continued)

Description Megapixels

Option one 2.07

Color gamut

99% (sRGB)

Pixels Per Inch (PPI)

92

Contrast ratio (minimum)

700:1, minimum 1000:1, typical

Response time (maximum)

25 ms, minimum 14 ms, typical

Refresh rate

60 Hz

Horizontal view angle

+/- 85 degrees, minimum +/- 89 degrees, typical

Vertical view angle

+/- 85 degrees, minimum +/- 89 degrees, typical

Pixel pitch

0.27 mm

Power consumption (maximum)

14.11 W

Anti-glare vs glossy finish

Anti-glare

Option two 2.07
99% (sRGB)
92
700:1, minimum 1000:1, typical
20 ms, minimum 14 ms, typical
60 Hz
+/- 85 degrees, minimum +/- 89 degrees, typical
+/- 85 degrees, minimum +/- 89 degrees, typical
0.27 mm
17.26 W
Anti-glare

Dell ComfortView
CAUTION: Prolonged exposure to blue light, particularly from digital sources, may disrupt sleep patterns and cause long-term effects such as eye strain, eye fatigue, or damage to the eyes.
Blue light is a color in the white light spectrum which has a short wavelength and high frequency. Chronic exposure to blue light, particularly from digital sources, may disrupt sleep patterns and change our body’s Circadian rhythm. Using the computer for an extended period may also cause fatigue in other body parts such as the neck, arm, back, and shoulder.
Dell low blue light displays optimize eye comfort with a flicker-free screen. The device uses flicker-free technology and maintains a stable backlight. Flicker-Free technology clears the visible flicker, brings comfortable viewing experience, and protects users from eye strain and fatigue. The ComfortView feature reduces the amount of blue light emitted from the monitor to optimize eye comfort. ComfortView mode can be enabled and configured using the Dell CinemaColor (DCC) application.
Dell CinemaColor
Dell CinemaColor (DCC) combines the hardware and software to deliver clear visuals that appear every bit as vibrant as the world around you. The DCC has four color profiles that optimize these settings depending on the content and your surroundings.
When you open DCC, you can choose Movie (default), ComfortView, Sports, or Animation from the list. The ComfortView Profile optimizes eye comfort by reducing harmful blue light emissions to make extended screen time easy on your eyes compared to standard digital panels while still retaining the vibrant colors.
ComfortView mode reduces hazardous blue light by adjusting display parameters. You can adjust the Saturation, Temperature, and Contrast values to create your custom setting in the ComfortView mode.
NOTE: For more information on how to download and install DellCinema components, search about it in the Knowledge Base Resource at Dell Support.

28

Specifications of OptiPlex All-in-One Plus 7420

ComfortView Plus
ComfortView Plus is a built-in, always-on, and virtually unnoticeable low blue light solution for Dell displays. ComfortView Plus employs a hardware-based design that allows for a wider blue spectrum, with a much lower peak and reduced intensity. Dell ComfortView Plus has been certified by TÜV Rheinland as a low blue light hardware solution. This feature is enabled at the factory.
NOTE: ComfortView Plus is an optional hardware feature to be configured at the point of sale.
To reduce the risk of eye strain, it is also recommended that you:
Position the display at a comfortable viewing distance between 20 in. to 28 in. (50 cm and 70 cm) from your eyes. Blink frequently to moisten your eyes, wet your eyes with water, or apply suitable eye drops. Look away from your display, and gaze at a distant object at 20 ft (609.60 cm) away for at least 20 seconds during each
break. Take an extended break for 20 minutes every two hours.

GPU–Integrated

The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your OptiPlex All-in-One Plus 7420.

Table 17. GPU–Integrated

Controller

External display support

Intel UHD Graphics 730

One DisplayPort++ 1.4a port (5120 x 3200 at 60 Hz)
One HDMI-out 2.1 port (4096 x 2160 at 60 Hz)

Memory size Shared system memory

Processor Intel Core i3

Intel UHD Graphics 770

One DisplayPort++ 1.4a port (5120 x 3200 at 60 Hz)
One HDMI-out 2.1 port (4096 x 2160 at 60 Hz)

Shared system memory

Intel Core i5 vPro/i7 vPro/i9 vPro

GPU–Discrete

The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your OptiPlex All-inOne Plus 7420.

Table 18. GPU–Discrete

Controller

External display support

Memory size

Memory type

AMD Radeon RX 6500

One DisplayPort++ 1.4a port (5120 x 3200 at 60 Hz)
One HDMI-out 2.1 port (4096 x 2160 at 60 Hz)

4 GB

GDDR6

Specifications of OptiPlex All-in-One Plus 7420

29

Hardware security
The following table lists the hardware security of your OptiPlex All-in-One Plus 7420.
Table 19. Hardware security Hardware security Kensington security-cable slot Chassis intrusion switch Trusted Platform Module (Discrete TPM Enabled) SafeBIOS including Dell Off-host BIOS Verification BIOS Resilience BIOS Recovery, and additional BIOS Controls SafeID including Trusted Platform Module (TPM) 2.0 Self-Encrypting Drives (SED) D-Pedigree (Secure Supply Chain Functionality)

Environmental

The following table lists the environmental specifications of your OptiPlex All-in-One Plus 7420.

Table 20. Environmental Feature Recyclable packaging BFR/PVC–free chassis Vertical orientation packaging support Multi-Pack packaging Energy-Efficient Power Supply ENV0424 compliant

Values Yes Yes Yes No Yes Yes

NOTE: Wood-based fiber packaging contains a minimum of 35% recycled content by total weight of wood-based fiber. Packaging that contains without wood-based fiber can be claimed as Not Applicable. The anticipated required criteria for EPEAT 2018.

Operating and storage environment

This table lists the operating and storage specifications of your OptiPlex All-in-One Plus 7420. Airborne contaminant level: G1 as defined by ISA-S71.04-1985

Table 21. Computer environment Description Temperature range

Operating 0°C to 35°C (32°F to 95°F)

Storage -40°C to 65°C (-40°F to 149°F)

Relative humidity (maximum)

10% to 90% (non-condensing)

0% to 95% (non-condensing)

Vibration (maximum)*

0.26 GRMS

1.30 GRMS

30

Specifications of OptiPlex All-in-One Plus 7420

Table 21. Computer environment (continued)

Description Shock (maximum)

40 G

Operating

Altitude range

-15.2 m to 3048 m (-49.87 ft to 10000 ft)

160 G

Storage

-15.2 m to 10668 m (-49.87 ft to 35000 ft)

CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.

• Measured using a random vibration spectrum that simulates the user environment. Measured using a 2 ms half-sine pulse.

Specifications of OptiPlex All-in-One Plus 7420

31

4

Working inside your computer

Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure in this document assumes that you have read the safety information that shipped with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/ regulatory_compliance.
WARNING: Disconnect your computer from all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting your computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the pins and the contacts.
CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity which could harm internal components.
CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable. When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
CAUTION: Exercise caution when handling rechargeable Li-ion batteries in laptops. Swollen batteries should not be used and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may differ from what is shown in this document.

Before working inside your computer

About this task NOTE: The images in this document may differ from your computer depending on the configuration you ordered.

Steps 1. Save and close all open files and exit all open applications. 2. Shut down your computer. For Windows operating system, click Start >

Power > Shut down.

32

Working inside your computer

NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down instructions.
3. Disconnect your computer and all attached devices from their electrical outlets. 4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
5. Remove any media card and optical disc from your computer, if applicable.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions. Observe the following safety precautions before you perform any installation or break-fix procedures involving disassembly or reassembly: Turn off the computer and all attached peripherals. Disconnect the computer and all attached peripherals from AC power. Disconnect all network cables, telephone, and telecommunications lines from the computer. Use an ESD field service kit when working inside any desktop to avoid electrostatic discharge (ESD) damage. After removing any computer component, carefully place the removed component on an anti-static mat. Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted. Unplugging, pressing, and holding the power button for 15 seconds should discharge residual power in the system board.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are powered while turned off. The internal power enables the computer to be remotely turned on (Wake-on-LAN) and suspended into a sleep mode and has other advanced power management features.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done by using a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a painted or nonmetal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge–ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards, processors, memory modules, and system boards. Slight charges can damage circuits in ways that may not be obvious, such as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased density, ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable. Two recognized types of ESD damage are catastrophic and intermittent failures. Catastrophic ­ Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes an
immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has received a static shock and immediately generates a “No POST/No Video” symptom with a beep code that is emitted for missing or nonfunctional memory. Intermittent ­ Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms that are related to the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, and so on.

Working inside your computer

33

The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or “walking wounded”) failure.
Perform the following steps to prevent ESD damage: Use a wired ESD wrist strap that is properly grounded. Wireless anti-static straps do not provide adequate protection.
Touching the chassis before handling parts does not ensure adequate ESD protection on parts with increased sensitivity to ESD damage. Handle all static-sensitive components in a static-safe area. If possible, use anti- static floor pads and workbench pads. When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti- static packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you discharge static electricity from your body. Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD Field Service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components: anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are: Anti-Static Mat ­ The anti- static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal on the computer being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the computer, or inside an ESD bag. Wrist Strap and Bonding Wire ­ The wrist strap and bonding wire can be either directly connected between your wrist and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is recommended to test the wrist strap and bonding wire at least once per week. ESD Wrist Strap Tester ­ The wires inside an ESD strap are prone to damage over time. When using an unmonitored kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your regional office to find out if they have one. To perform the test, plug the bonding-wire of wrist-strap into the tester while it is strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm sounds if the test fails. Insulator Elements ­ It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are insulators and often highly charged. Working Environment ­ Before deploying the ESD Field Service kit, assess the situation at the customer location. For example, deploying the kit for a server environment is different than for a desktop or laptop environment. Servers are typically installed in a rack within a data center; desktops or laptops are typically placed on office desks or cubicles. Always look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to accommodate the type of computer that is being repaired. The workspace should also be free of insulators that can cause an ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or 30 centimeters away from sensitive parts before physically handling any hardware components. ESD Packaging ­ All ESD-sensitive devices must be shipped and received in static- safe packaging. Metal, static-shielded bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is shielded. Always place parts in your hand, on the ESD mat, in the computer, or inside an anti-static bag. Transporting Sensitive Components ­ When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.

34

Working inside your computer

ESD protection summary
It is recommended to always use the traditional wired ESD grounding wrist strap and protective anti-static mat when servicing Dell products. In addition, it is critical to keep sensitive parts separate from all insulator parts while performing service and use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
Lifting equipment
Adhere to the following guidelines when lifting heavy equipment: CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting device.
1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out. 2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load. 3. Lift with your legs, not your back. 4. Keep the load close. The closer it is to your spine, the less force it exerts on your back. 5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid
twisting your body and back. 6. Follow the same technique in reverse to set the load down.
After working inside your computer
About this task
CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.
Steps 1. Replace all screws and ensure that no stray screws remain inside your computer. 2. Connect any external devices, peripherals, or cables you removed before working on your computer. 3. Replace any media cards, discs, or any other parts that you removed before working on your computer. 4. Connect your computer and all attached devices to their electrical outlets. 5. Turn on your computer.
BitLocker
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress, and the system will ask for the recovery key on each reboot. If the recovery key is not known, this can result in data loss or an unnecessary operating system reinstall. For more information about this subject, see Knowledge Article: updating the BIOS on Dell systems with BitLocker enabled. The installation of the following components triggers BitLocker: Hard disk drive or solid-state drive System board
Recommended tools
The procedures in this document may require the following tools:

Working inside your computer

35

Phillips screwdriver #1 Plastic scribe

Screw list

NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.
NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surfaces when replacing a component.
NOTE: Screw color may vary with the configuration ordered.

Table 22. Screw list Component Graphics-card shield

Screw type M3x5

Quantity 2

Screw image

Graphics card

M2.5×5

2

Captive

4

Graphics-card fan

M3x5

2

System-board shield

M3x5

6

Wireless card

M2x3.5

1

M.2 2230/2280 solid-state

M2x3.5

1

drive in M.2 slot 0

M.2 2230/2280 solid-state

M2x3.5

1

drive in M.2 slot 1

I/O cover

M3x5

2

Bottom cover

M3x5

3

Retractable-camera assembly M3x5

4

Fan

M3x5

3

36

Working inside your computer

Table 22. Screw list (continued)

Component I/O bracket

Screw type M3x5

Heat sink

Captive

Quantity 2
5

Screw image

Power-supply unit

M3x5

3

Power-supply connector cable M3x5

2

bracket

Power-supply fan

M3x5

2

System board

M3x5

7

M3x12

1

Power-button and I/O board M3x5

3

shield

Power-button and I/O board M3x5

2

Audio board shield

M3x5

3

Audio board

M3x5

2

Major components of your OptiPlex All-in-One Plus 7420
The following image shows the major components of your OptiPlex All-in-One Plus 7420.

Working inside your computer

37

Figure 14. Major components of your OptiPlex All-in-One Plus 7420
1. Stand 2. Bottom cover 3. Antenna modules 4. Heat sink 5. Processor 6. Fan 7. M.2 2280 solid-state drive 8. Memory module 9. M.2 2230 solid-state drive 10. Wireless card 11. Audio board 12. I/O bracket 13. Power-button and I/O board 14. Middle frame 15. I/O cover 16. Display base 17. Display panel 18. Graphics card

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Working inside your computer

19. Speakers 20. Power-supply unit (PSU) 21. Fan shroud 22. Coin-cell battery 23. System board 24. System-board shield 25. Retractable-camera assembly 26. Power-supply fan 27. Back cover
NOTE: Dell provides a list of components and their part numbers for the original configuration purchased. These parts are available according to warranty coverage purchased by the customer. Contact your Dell sales representative for purchase options.

Working inside your computer

39

5
Removing and installing Customer Replaceable Units (CRUs)
The replaceable components in this chapter are Customer Replaceable Units (CRUs). CAUTION: Customers can replace only the Customer Replaceable Units (CRUs) following the safety precautions and replacement procedures. NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Stand
Removing the stand
Prerequisites 1. Follow the procedure in Before working inside your computer.
About this task NOTE: Depending on the stand installed on your computer, refer to the corresponding image shown in the procedure.
The following images indicate the location of the stand and provide a visual representation of the removal procedure.

Figure 15. Removing the Height Adjustable Stand (HAS)

40

Removing and installing Customer Replaceable Units (CRUs)

Figure 16. Removing the Fixed Stand
Steps 1. Place the display-assembly base on a clean and flat surface. 2. Press and hold down on the tab that secures the stand to the display-assembly base. 3. Slide and lift the stand off the display-assembly base.
Installing the stand
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: Depending on the stand you are installing onto your computer, refer to the corresponding image shown in the procedure.
The following images indicate the location of the stand and provide a visual representation of the installation procedure.

Removing and installing Customer Replaceable Units (CRUs)

41

Figure 17. Installing the Height Adjustable Stand (HAS)

Figure 18. Installing the Fixed Stand
Steps 1. At an angle, align the tabs on the stand with the slots on the display-assembly base. 2. Slide the tabs on the stand into the slots on the display-assembly base.

42

Removing and installing Customer Replaceable Units (CRUs)

Next steps 1. Follow the procedure in After working inside your computer.
Back cover
Removing the back cover
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand.
About this task NOTE: Before removing the base cover, ensure that there is no SD card installed in the SD-card slot on your computer.
The following image indicates the location of the back cover and provides a visual representation of the removal procedure.

Figure 19. Removing the back cover
Steps 1. Press down on the tab that secures the back cover to the display- assembly base. 2. Slide and lift the back cover off the display-assembly base.
Installing the back cover
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

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About this task The following image indicates the location of the back cover and provides a visual representation of the installation procedure.

Figure 20. Installing the back cover
Steps 1. Align the back cover to the display-assembly base. 2. Place and slide the back cover into place on the display assembly base.
Next steps 1. Install the stand. 2. Follow the procedure in After working inside your computer.
Memory
Removing the memory
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover.
About this task The following image indicates the location of the memory and provides a visual representation of the removal procedure.

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Figure 21. Removing the memory
Steps 1. Using the tab on the DIMM door, pry open and lift the DIMM door on the system-board shield to access the memory slots. 2. Using your fingertips, carefully spread apart the securing clips on each end of the memory-module slot until the memory
module pops out. 3. Remove the memory module from the memory-module slot.
NOTE: Repeat steps 2 to 3 for each memory module installed on your computer.
Installing the memory
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the memory and provides a visual representation of the installation procedure.

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Figure 22. Installing the memory
Steps 1. Align the notch on the memory module with the tab on the memory- module slot. 2. Slide the memory module firmly into the slot at an angle and press down on the memory module down until it clicks into
place. NOTE: If you do not hear the click, remove the memory module and reinstall it.
NOTE: Repeat steps 1 to 2 for each memory module to be installed on your computer.
3. Close the DIMM door and press it into place, securing it.
Next steps 1. Install the back cover. 2. Install the stand. 3. Follow the procedure in After working inside your computer.

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Graphics card
Removing the graphics card
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover.
About this task The following image indicates the location of the graphics card and provides a visual representation of the removal procedure.

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Figure 23. Removing the graphics card
Steps 1. Remove the two screws (M3x5) that secure the graphics-card assembly to the display-assembly base. 2. Slide and lift the graphics-card assembly off the display-assembly base.

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3. Using the tab on the DGFX door, pry open and lift the DGFX door on the graphics-card shield to access the graphics-card fan connector.
4. Disconnect the graphics-card fan from the graphics card. 5. Flip over the graphics-card assembly. 6. Remove the two screws (M2.5×5) that secure the graphics card to the graphics-card assembly. 7. Loosen the four captive screws that secure the graphics card to the graphics-card assembly. 8. Lift the graphics card off the graphics-card assembly. 9. Remove the two screws (M3x5) that secure the graphics-card fan to the graphics-card shield. 10. Lift the graphics-card fan off the graphics-card shield.
Installing the graphics card
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the graphics card and provides a visual representation of the installation procedure.

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Figure 24. Installing the graphics card
Steps 1. Align the notch on the memory module with the tab on the memory- module slot 2. Slide the memory module firmly into the slot at an angle and press down on the memory module down until it clicks into
place.

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NOTE: If you do not hear the click, remove the memory module and reinstall it again.
NOTE: Repeat steps 1 to 2 for each memory module to be installed on your computer.
3. Close the DIMM door and press it into place, securing it.
Next steps 1. Install the back cover. 2. Install the stand. 3. Follow the procedure in After working inside your computer.
System-board shield
Removing the system-board shield
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover.
About this task The following image indicates the location of the system-board shield and provides a visual representation of the removal procedure.

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Figure 25. Removing the system-board shield
Steps 1. Remove the six screws (M3x5) that secure the system-board shield to the display-assembly base. 2. Lift the system-board shield off the display- assembly base.
Installing the system-board shield
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the system-board shield and provides a visual representation of the installation procedure.

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Figure 26. Installing the system-board shield
Steps 1. Place the system-board on the display-assembly base. 2. Align the screw holes on the system-board shield with the screw holes on the display- assembly base. 3. Replace the six screws (M3x5) that secure the system-board shield to the display-assembly base.
Next steps 1. Install the back cover. 2. Install the stand. 3. Follow the procedure in After working inside your computer.
Wireless card
Removing the wireless card
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.

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About this task The following image indicates the location of the wireless card and provides a visual representation of the removal procedure.

Figure 27. Removing the wireless card
Steps 1. Remove the screw (M2x3.5) that secures the wireless-card bracket to the wireless card. 2. Lift the wireless-card bracket off the wireless card. 3. Disconnect the antenna cables from the wireless card. 4. Slide and lift the wireless card from the wireless-card slot (M.2 WLAN).
Installing the wireless card
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the wireless card and provides a visual representation of the installation procedure.

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Figure 28. Installing the wireless card

Steps 1. Connect the antenna cables to the wireless card.

Table 23. Antenna-cable color scheme

Connector on the wireless card

Antenna-cable color Silkscreen marking

Main

White

MAIN

Auxiliary

Black

AUX

(white triangle) (black triangle)

2. Place the wireless-card bracket on the wireless card. 3. Align the notch on the wireless card with the tab on the wireless-card slot (M.2 WLAN). 4. Slide the wireless card at an angle into the wireless-card slot (M.2 WLAN). 5. Replace the screw (M2x3.5) that secures the wireless-card bracket to the wireless card.

Next steps
1. Install the system-board shield. 2. Install the back cover.

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3. Install the stand. 4. Follow the procedure in After working inside your computer.
Solid-state drive in M.2 slot 0
Removing the M.2 2230 solid-state drive in M.2 slot 0
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task NOTE: Depending on the configuration ordered, your computer may have up to two M.2 2230 or 2280 solid-state drives installed in the solid- state drive slots on the system board. NOTE: This procedure is applicable for computers where an M.2 2230 solid-state drive is installed in the solid-state drive slot (M.2 PCIe SSD 0) on the system board.
The following image indicates the location of the M.2 2230 solid-state drive in M.2 slot 0 and provides a visual representation of the removal procedure.

Figure 29. Removing the M.2 2230 solid-state drive in M.2 slot 0
Steps 1. Remove the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the system board. 2. Slide and lift the M.2 2230 solid-state drive from the solid-state drive slot (M.2 PCIe SSD 0) on the system board.

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Installing the M.2 2230 solid-state drive in M.2 slot 0
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: This procedure is only applicable if you are installing an M.2 2230 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 0) on the system board. NOTE: Ensure that the M.2 screw mount is in the proper location to install the M.2 2230 solid-state drive, refer to Location of the screw mount on M.2 slot 0.
The following image indicates the location of the M.2 2230 solid-state drive in M.2 slot 0 and provides a visual representation of the installation procedure.

Figure 30. Installing the M.2 2230 solid-state drive in M.2 slot 0
Steps 1. Align the notch on the M.2 2230 solid-state drive with the tab on the solid-state drive slot (M.2 PCIe SSD 0). 2. Slide the M.2 2230 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 0) on the system board. 3. Replace the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the system board.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.
Removing the M.2 2280 solid-state drive in M.2 slot 0
Prerequisites 1. Follow the procedure in Before working inside your computer.

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2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task NOTE: Depending on the configuration ordered, your computer may have up to two M.2 2230 or 2280 solid-state drives installed in the solid- state drive slots on the system board.
NOTE: This procedure is applicable for computers where an M.2 2280 solid-state drive is installed in the solid-state drive slot (M.2 PCIe SSD 0) on the system board.
The following image indicates the location of the M.2 2280 solid-state drive in M.2 slot 0 and provides a visual representation of the removal procedure.

Figure 31. Removing the M.2 2280 solid-state drive in M.2 slot 0
Steps 1. Remove the screw (M2x3.5) that secures the M.2 2280 solid-state drive to the system board. 2. Slide and lift the M.2 2280 solid-state drive from the solid-state drive slot (M.2 PCIe SSD 0) on the system board.
Installing the M.2 2280 solid-state drive in M.2 slot 0
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: This procedure is only applicable if you are installing an M.2 2280 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 0) on the system board. NOTE: Ensure that the M.2 screw mount is in the proper location to install the M.2 2280 solid-state drive, refer to Location of the screw mount on M.2 slot 0.
The following image indicates the location of the M.2 2280 solid-state drive in M.2 slot 0 and provides a visual representation of the installation procedure.

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Figure 32. Installing the M.2 2280 solid-state drive in M.2 slot 0
Steps 1. Align the notch on the M.2 2280 solid-state drive with the tab on the solid-state drive slot (M.2 PCIe SSD 0). 2. Slide the M.2 2280 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 0) on the system board. 3. Replace the screw (M2x3.5) that secures the M.2 2280 solid-state drive to the system board.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.
Location of the screw mount on M.2 slot 0
Prerequisites To install an M.2 solid-state drive of a different form factor on M.2 slot 0, the location of the screw mount on M.2 slot 0 has to be changed in order to install the M.2 solid-state drive of a different form factor.
About this task NOTE: This procedure only applies to the screw mount located on M.2 slot 0.
The following images indicates the location of the screw mount on M.2 slot 0 and provides a visual representation of the procedure to change the position of the screw mount.

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Figure 33. Moving the solid-state screw mount on M.2 slot 0
Steps 1. Remove the screw mount on the system board. 2. Install the screw mount on the system board.
Next steps 1. Install the M.2 2230 solid-state drive in slot 0 or the M.2 2280 solid-state drive in slot 0, whichever is applicable. 2. Install the system- board shield. 3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.
Solid-state drive in M.2 slot 1
Removing the M.2 2230 solid-state drive in M.2 slot 1
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover.
About this task NOTE: Depending on the configuration ordered, your computer may have up to two M.2 2230 or 2280 solid-state drives installed in the solid- state drive slots on the system board. NOTE: This procedure is applicable for computers where an M.2 2230 solid-state drive is installed in the solid-state drive slot (M.2 PCIe SSD 1) on the system board.
The following image indicates the location of the M.2 2230 solid-state drive in M.2 slot 1 and provides a visual representation of the removal procedure.

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Figure 34. Removing the M.2 2230 solid-state drive in M.2 slot 1
Steps 1. Remove the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the system board. 2. Slide and lift the M.2 2230 solid-state drive from the solid-state drive slot (M.2 PCIe SSD 1) on the system board.
Installing the M.2 2230 solid-state drive in M.2 slot 1
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: This procedure is only applicable if you are installing an M.2 2230 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 1) on the system board. NOTE: Ensure that the M.2 screw mount is in the proper location to install the M.2 2230 solid-state drive, refer to Location of the screw mount on M.2 slot 1.
The following image indicates the location of the M.2 2230 solid-state drive in M.2 slot 1 and provides a visual representation of the installation procedure.

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Figure 35. Installing the M.2 2230 solid-state drive in M.2 slot 1
Steps 1. Align the notch on the M.2 2230 solid-state drive with the tab on the solid-state drive slot (M.2 PCIe SSD 1). 2. Slide the M.2 2230 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 1) on the system board. 3. Replace the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the system board.
Next steps 1. Install the I/O cover. 2. Install the system-board shield. 3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.
Removing the M.2 2280 solid-state drive in M.2 slot 1
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover.
About this task NOTE: Depending on the configuration ordered, your computer may have up to two M.2 2230 or 2280 solid-state drives installed in the solid- state drive slots on the system board.
NOTE: This procedure is applicable for computers where an M.2 2280 solid-state drive is installed in the solid-state drive slot (M.2 PCIe SSD 1) on the system board. The following image indicates the location of the M.2 2280 solid-state drive in M.2 slot 1 and provides a visual representation of the removal procedure.

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Figure 36. Removing the M.2 2280 solid-state drive in M.2 slot 1
Steps 1. Remove the screw (M2x3.5) that secures the M.2 2280 solid-state drive to the system board. 2. Slide and lift the M.2 2280 solid-state drive from the solid-state drive slot (M.2 PCIe SSD 1) on the system board.
Installing the M.2 2280 solid-state drive in M.2 slot 1
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: This procedure is only applicable if you are installing an M.2 2280 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 1) on the system board. NOTE: Ensure that the M.2 screw mount is in the proper location to install the M.2 2280 solid-state drive, refer to Location of the screw mount on M.2 slot 1.
The following image indicates the location of the M.2 2280 solid-state drive in M.2 slot 1 and provides a visual representation of the installation procedure.

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Figure 37. Installing the M.2 2280 solid-state drive in M.2 slot 1
Steps 1. Align the notch on the M.2 2280 solid-state drive with the tab on the solid-state drive slot (M.2 PCIe SSD 1). 2. Slide the M.2 2280 solid-state drive into the solid-state drive slot (M.2 PCIe SSD 1) on the system board. 3. Replace the screw (M2x3.5) that secures the M.2 2280 solid-state drive to the system board.
Next steps 1. Install the I/O cover. 2. Install the system-board shield. 3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.
Location of the screw mount on M.2 slot 1
Prerequisites To install an M.2 solid-state drive of a different form factor on M.2 slot 1, the location of the screw mount on M.2 slot 1 has to be changed in order to install the M.2 solid-state drive of a different form factor.
About this task NOTE: This procedure only applies to the screw mount located on M.2 slot 1.
The following image indicates the location of the screw mount on M.2 slot 1 and provides a visual representation of the procedure to change the position of the screw mount.

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Figure 38. Moving the solid-state screw mount on M.2 slot 1
Steps 1. Remove the screw mount on the system board. 2. Install the screw mount on the system board.
Next steps 1. Install the M.2 2230 solid-state drive in slot 1 or the M.2 2280 solid-state drive in slot 1, whichever is applicable. 2. Install the I/O cover. 3. Install the system-board shield. 4. Install the back cover. 5. Install the stand. 6. Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin-cell battery
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.

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Figure 39. Removing the coin-cell battery
Steps 1. Push the release lever on the coin-cell battery socket (RTC) to release the coin-cell battery out of the socket. 2. Lift the coin-cell battery from the coin-cell battery socket.
Installing the coin-cell battery
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the coin-cell battery and provides a visual representation of the installation procedure.

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Figure 40. Installing the coin-cell battery
Steps With the positive side (+) facing up, insert the coin-cell battery into the battery socket (RTC) on the system board and snap the battery into place.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.
I/O cover
Removing the I/O cover
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task The following image indicates the location of the I/O cover and provides a visual representation of the removal procedure.

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Figure 41. Removing the I/O cover
Steps 1. Remove the two screws (M3x5) that secure the I/O cover to the display-assembly base. 2. Lift the I/O cover off the display-assembly base.
Installing the I/O cover
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the I/O cover and provides a visual representation of the installation procedure.

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Figure 42. Installing the I/O cover
Steps 1. Place the I/O cover on the display-assembly base. 2. Align the I/O slots with the I/O ports and the screw holes on the I/O cover with the screw holes on the display-assembly
base. 3. Replace the two screws (M3x5) that secure the I/O cover to the display-assembly base.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.
Bottom cover
Removing the bottom cover
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover.
About this task The following image indicates the location of the bottom cover and provides a visual representation of the removal procedure.

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Figure 43. Removing the bottom cover
Steps 1. Remove the three screws (M3x5) that secure the bottom cover to the display-assembly base. 2. Lift the bottom cover off the display-assembly base.
Installing the bottom cover
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the bottom cover and provides a visual representation of the installation procedure.

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Figure 44. Installing the bottom cover
Steps 1. Place and align the bottom cover with the display-assembly base. 2. Align the screw holes on the bottom cover with the screw holes on the display- assembly base. 3. Replace the three screws (M3x5) that secure the bottom cover to the display-assembly base.
Next steps 1. Install the I/O cover. 2. Install the system-board shield. 3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.
Retractable-camera assembly
Removing the retractable-camera assembly
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task NOTE: The retractable-camera assembly consists of the following components: camera microphones
The following image indicates the location of the retractable-camera assembly and provides a visual representation of the removal procedure.

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Figure 45. Removing the retractable-camera assembly
Steps 1. Remove the two screws (M3x5) that secure the camera-assembly bracket to the display-assembly base. 2. Lift the camera-assembly bracket off the display-assembly base. 3. Using the pull tab, disconnect the camera cable from its connector (WEBCAM) on the system board. 4. Remove the two screws (M3x5) that secure the retractable-camera assembly to the display-assembly base. 5. Lift and slide the retractable-camera assembly from its slot and under the heat sink and remove the retractable-camera
assembly from the display-assembly base.
Installing the retractable-camera assembly
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the retractable- camera assembly and provides a visual representation of the installation procedure.

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Figure 46. Installing the retractable-camera assembly
Steps 1. Slide the retractable-camera assembly under the heat sink into its slot on the display-assembly base. 2. Align the screw holes on the retractable-camera assembly with the screw holes on the display-assembly base. 3. Replace the two screws (M3x5) that secure the retractable-camera assembly to the display-assembly base. 4. Connect the camera cable to its connector (WEBCAM) on the system board. 5. Place the camera-assembly bracket over retractable-camera assembly. 6. Align the screw holes on the camera-assembly bracket with the screw holes on the display-assembly base. 7. Replace the two screws (M3x5) that secure the camera-assembly bracket to the display-assembly base.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.

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Fan
Removing the fan
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task The following image indicates the location of the fan and provides a visual representation of the removal procedure.

Figure 47. Removing the fan
Steps 1. Press and hold the securing clip and disconnect the processor-power cable from its connector (ATX CPU) on the system
board. 2. Remove the processor-power cable from the routing guide on the display-assembly base. 3. Lift the processor-power cable from the system board to access the fan cable. 4. Remove the three screws (M3x5) that secure the fan to the display-assembly base. 5. Disconnect the fan cable from its connector (CPU FAN) on the system board. 6. Lift the fan off the display-assembly base.

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Installing the fan
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the fan and provides a visual representation of the installation procedure.

Figure 48. Installing the fan
Steps 1. Place the fan on the display-assembly base. 2. Align the screw holes on the fan with the screw holes on the display-assembly base. 3. Replace the three screws (M3x5) that secure the fan to the display-assembly base. 4. Connect the fan cable to its connector (CPU FAN) on the system board. 5. Route the processor-power cable through the routing guide on the display-assembly base. 6. Connect the processor-power cable to its connector (ATX CPU) on the system board.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.

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Power-supply unit
Removing the power-supply unit
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover.
About this task The following image indicates the location of the power-supply unit and provides a visual representation of the removal procedure.

Figure 49. Removing the power-supply unit

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Steps 1. Press and hold the securing clip and disconnect the processor-power cable from its connector (ATX CPU) on the system
board. 2. Disconnect the control-signal cable from its connector (CTRL) on the system board. 3. Disconnect the system-board power cable from its connector (ATX SYS) on the system board. 4. Remove the three screws (M3x5) that secure the power-supply unit to the display-assembly base. 5. Remove the two screws (M3x5) that secure the power-supply connector cable bracket to the display- assembly base. 6. Lift the power-supply unit, its cables, and the power-supply unit connector off the display-assembly base.
Installing the power-supply unit
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the power-supply unit and provides a visual representation of the installation procedure.

Figure 50. Installing the power-supply unit

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Steps 1. Place the power-supply unit and the power-supply unit connector on the display-assembly base. 2. Align the screw holes on the power-supply unit with the screw holes on the display-assembly base. 3. Replace the three screws (M3x5) that secure the power-supply unit to the display-assembly base. 4. Align the screw holes on the power-supply connecty bracket with the screw holes on the display-assembly base. 5. Replace the two screws (M3x5) that secure the power-supply connector bracket to the display-assembly base. 6. Connect the processor-power cable to its connector (ATX CPU) on the system board. 7. Connect the control-signal cable to its connector (CTRL) on the system board. 8. Connect the system-board power cable to its connector (ATX SYS) on the system board.
Next steps 1. Install the I/O cover. 2. Install the system-board shield. 3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.

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6
Removing and installing Field Replaceable Units (FRUs)
The replaceable components in this chapter are Field Replaceable Units (FRUs). CAUTION: The information in this removing and installing FRU’s section is intended for authorized service technicians only. CAUTION: To avoid any potential damage to the component or loss of data, ensure that an authorized service technician replaces the Field Replaceable Units (FRUs). CAUTION: Dell Technologies recommends that this set of repairs, if needed, to be conducted by trained technical repair specialists. CAUTION: As a reminder, your warranty does not cover damages that may occur during FRU repairs that are not authorized by Dell Technologies. NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Power-supply fan
Removing the power-supply fan
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover. 6. Remove the power-supply unit.
About this task The following images indicate the location of the power-supply fan and provide a visual representation of the removal procedure.

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Figure 51. Removing the power-supply fan

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Figure 52. Removing the power-supply fan

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Figure 53. Removing the power-supply fan
Steps 1. Disconnect the power-supply fan cable from its connector (FAN SYS) on the system board. 2. Remove the power-supply fan cable from the routing guides on the display-assembly base. 3. Remove the audio-board cable from the routing guides on the display-assembly base and the power-supply fan. 4. Remove the antenna cables from the routing guides on the display-assembly base and the power-supply fan. 5. Remove the two screws (M3x5) that secure the power-supply fan to the display-assembly base. 6. Lift the power-supply fan off the display-assembly base.
Installing the power-supply fan
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following images indicate the location of the power-supply fan and provide a visual representation of the installation procedure.

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Figure 54. Installing the power-supply fan

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Figure 55. Installing the power-supply fan

Figure 56. Installing the power-supply fan

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Steps 1. Place the power-supply fan on the display-assembly base. 2. Align the screw holes on the power-supply fan with the screw holes on the display- assembly base. 3. Replace the two screws (M3x5) that secure the power-supply fan to the display-assembly base. 4. Route the antenna cables through the routing guides on the display-assembly base and the power-supply fan. 5. Route the audio-board cable through the routing guides on the display-assembly base and the power-supply fan. 6. Route the power-supply fan cable through the routing guide on the display-assembly base. 7. Connect the power-supply fan cable to its connector (FAN SYS) on the system board.
Next steps 1. Install the power-supply unit. 2. Install the I/O cover. 3. Install the system-board shield. 4. Install the back cover. 5. Install the stand. 6. Follow the procedure in After working inside your computer.
I/O bracket
Removing the I/O bracket
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover. 6. Remove the bottom cover.
About this task The following image indicates the location of the I/O bracket and provides a visual representation of the removal procedure.

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Figure 57. Removing the I/O bracket
Steps 1. Remove the two screws (M3x5) that secure the power-supply cable connector bracket to the display-assembly base. 2. Lift the power-supply cable connector bracket off the display-assembly base. 3. Remove the two screws (M3x5) that secure the I/O bracket to the display-assembly base. 4. Lift the I/O bracket off the display-assembly base.
Installing the I/O bracket
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the I/O bracket and provides a visual representation of the installation procedure.

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Figure 58. Installing the I/O bracket
Steps 1. Place and align the I/O bracket with the display-assembly base. 2. Align the I/O slots to the I/O ports and the screw holes on the I/O bracket with the screw holes on the display-assembly
base. 3. Replace the two screws (M3x5) that secure the I/O cover to the display-assembly base. 4. Place the power-supply connector cable bracket on the display-assembly base. 5. Align the power-supply cable connector bracket screw holes with the screw holes on the display-assembly base. 6. Replace the two screws (M3x5) that secure the power-supply cable connector bracket to the display-assembly base.
Next steps 1. Install the bottom cover. 2. Install the I/O cover. 3. Install the system-board shield. 4. Install the back cover. 5. Install the stand. 6. Follow the procedure in After working inside your computer.
Speakers
Removing the speakers
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.

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5. Remove the I/O cover. 6. Remove the bottom cover.
About this task The following image indicates the location of the speakers and provides a visual representation of the removal procedure.

Figure 59. Removing the speakers
Steps 1. Disconnect the speaker cable from its connector (INT SPKR) on the audio board. 2. Remove the speaker cable from its routing guides on the display-assembly base. 3. Lift the speakers and its cable off the display- assembly base.
Installing the speakers
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the speakers and provides a visual representation of the installation procedure.

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Figure 60. Installing the speakers
Steps 1. Insert the speakers into their slots on the display-assembly base. 2. Route the speaker cable through the routing guides on the display-assembly base. 3. Connect the speaker cable to its connector (INT SPKR) on the audio board.
Next steps 1. Install the bottom cover. 2. Install the I/O cover. 3. Install the system-board shield. 4. Install the back cover. 5. Install the stand. 6. Follow the procedure in After working inside your computer.
Heat sink
Removing the heat sink
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield.
About this task NOTE: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it.

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NOTE: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin can reduce the heat transfer capability of the thermal grease.
The following image indicates the location of the heat sink and provides a visual representation of the removal procedure.

Figure 61. Removing the heat sink
Steps 1. In reverse sequential order (5>4>3>2>1) loosen the five captive screws that secure the heat sink to the system board and
the display-assembly base. 2. Lift the heat sink off the display-assembly base.
Installing the heat sink
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: If either the processor or the fan and heat sink is replaced, use the thermal grease provided in the kit to ensure optimal thermal conductivity.
The following image indicates the location of the heat sink and provides a visual representation of the installation procedure.

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Figure 62. Installing the heat sink
Steps 1. Place the heat sink on the system board and the display-assembly base. 2. Align the screws on the heat sink with the screw holes on the system board and the display-assembly base. 3. In sequential order (1>2>3>4>5) tighten the five captive screws that secure the heat sink to the system board and the
display-assembly base.
Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your computer.
Processor
Removing the processor
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the heat sink.
About this task NOTE: The processor may become hot during normal operation. Allow sufficient time for the processor to cool before you touch it.

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NOTE: For maximum cooling of the processor, do not touch the heat transfer areas on the processor. The oils in your skin can reduce the heat transfer capability of the thermal grease.
The following image indicates the location of the processor and provides a visual representation of the removal procedure.

Figure 63. Removing the processor
Steps 1. Press the release lever down and then push it away from the processor to release it from the securing tab. 2. Extend the release lever completely and open the processor cover.
CAUTION: When removing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket. 3. Gently lift the processor from the processor socket (CPU).
Installing the processor
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

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About this task NOTE: If either the processor or the fan and heat sink is replaced, use the thermal grease provided in the kit to ensure optimal thermal conductivity.
The following image indicates the location of the processor and provides a visual representation of the installation procedure.

Figure 64. Installing the processor
Steps 1. Ensure that the release lever on the processor socket is fully extended in the open position.
NOTE: The pin-1 corner of the processor has a triangle that aligns with the triangle on the pin-1 corner on the processor socket. When the processor is properly seated, all four corners are aligned at the same height. If one or more corners of the processor is higher than the others, the processor is not seated properly.
2. Align the notches on the processor with the tabs on the processor socket and place the processor in the processor socket (CPU). CAUTION: Ensure that the processor-cover notch is positioned underneath the alignment post.
3. When the processor is fully seated in the socket, pivot the release-lever down and place it under the tab on the processor cover.
Next steps 1. Install the heat sink. 2. Install the system-board shield.

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3. Install the back cover. 4. Install the stand. 5. Follow the procedure in After working inside your computer.
System board
Removing the system board
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the memory. 5. Remove the graphics card. 6. Remove the system-board shield. 7. Remove the I/O cover. 8. Remove the bottom cover. 9. Remove the I/O bracket. 10. Remove the M.2 2230 solid-state drive in slot 0 or the M.2 2280 solid-state drive in slot 0, whichever is applicable. 11. Remove the M.2 2230 solid-state drive in slot 1 or the M.2 2280 solid-state drive in slot 1, whichever is applicable. 12. Remove the wireless card. 13. Remove the heat sink. 14. Remove the processor.
About this task NOTE: Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup program. Make the appropriate changes again after you replace the system board.
The following image indicates the connectors on your system-board.

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Figure 65. System board callouts

1. Touchscreen cable (TOUCH) 3. Processor socket (CPU) 5. Processor-power cable (ATX CPU) 7. Fan cable (FAN CPU) 9. System-board power cable (ATX SYS) 11. Wireless-card slot (M.2 WLAN) 13. High-speed cable (MB-HS) 15. Solid-state drive slots (M.2 PCIe SSD 1 + M.2 PCIe SSD 0) 17. Coin-cell battery socket (RTC)

2. Display-backlight cable (LCD BACKLIGHT) 4. Camera cable (WEBCAM) 6. Memory slots (DIMM1 + DIMM2) 8. Control-signal cable (CTRL) 10. Power-supply fan cable (FAN SYS) 12. Audio cable (MB-AUDIO) 14. Power cable (MB-PWR) 16. Display cable (LVDS) 18. PCIe x 16 expansion slot (SLOT1 PCIe4 x4)

The following images indicate the location of the system board and provide a visual representation of the removal procedure.

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Figure 66. Removing the system board

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Figure 67. Removing the system board
Steps
1. Disconnect the touchscreen cable from its connector (TOUCH) on the system board. 2. Disconnect the display-backlight cable from its connector (LCB BACKLIGHT) on the system board. 3. Using the pull tab, disconnect the camera cable from its connector (WEBCAM) on the system board. 4. Press and hold the securing clip and disconnect the processor-power cable from its connector (ATX CPU) on the system
board. 5. Disconnect the fan cable from its connector (FAN CPU) on the system board. 6. Disconnect the control-signal cable from its connector (CTRL) on the system board. 7. Disconnect the system-board power cable from its connector (ATX SYS) on the system board. 8. Disconnect the power-supply fan cable from its connector (FAN SYS) on the system board. 9. Lift the latch and disconnect the audio cable from its connector (MB-AUDIO) on the system board. 10. Lift the latch and disconnect the high-speed cable from its connector (MB-HS) on the system board. 11. Lift the latch and disconnect the power cable from its connector (MB-PWR) on the system board. 12. Pinching the securing clips on either side of the display-cable connector, disconnect the display cable from its connector
(LVDS) on the system board. 13. Remove the seven screws (M3x5) that secure the system board to the display-assembly base. 14. Remove the screw (M3x12) that secures the system board to the display-assembly base. 15. Gently lift the system board off the display-assembly base.

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Installing the system board
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup program. Make the appropriate changes again after you replace the system board.
The following image indicates the connectors on your system-board.

Figure 68. System board callouts

1. Touchscreen cable (TOUCH) 3. Processor socket (CPU) 5. Processor-power cable (ATX CPU) 7. Fan cable (FAN CPU) 9. System-board power cable (ATX SYS) 11. Wireless-card slot (M.2 WLAN) 13. High-speed cable (MB-HS) 15. Solid-state drive slots (M.2 PCIe SSD 1 + M.2 PCIe SSD 0) 17. Coin-cell battery socket (RTC)

2. Display-backlight cable (LCD BACKLIGHT) 4. Camera cable (WEBCAM) 6. Memory slots (DIMM1 + DIMM2) 8. Control-signal cable (CTRL) 10. Power-supply fan cable (FAN SYS) 12. Audio cable (MB-AUDIO) 14. Power cable (MB-PWR) 16. Display cable (LVDS) 18. PCIe x 16 expansion slot (SLOT1 PCIe4 x4)

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The following images indicate the location of the system board and provide a visual representation of the installation procedure.

Figure 69. Installing the system board

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Figure 70. Installing the system board
Steps 1. Gently place the system board on the display-assembly base. 2. Align the screw holes on the system board with the screw holes on the display- assembly base. 3. Replace the seven screws (M3x5) that secure the system board to the display-assembly base. 4. Replace the screw (M3x12) that secures the system board to the display-assembly base. 5. Connect the touchscreen cable to its connector (TOUCH) on the system board. 6. Connect the display-backlight cable to its connector (LCB BACKLIGHT) on the system board. 7. Connect the camera cable to its connector (WEBCAM) on the system board. 8. Connect the processor-power cable to its connector (ATX CPU) on the system board. 9. Connect the fan cable to its connector (FAN CPU) on the system board. 10. Connect the control-signal cable to its connector (CTRL) on the system board. 11. Connect the system-board power cable to its connector (ATX SYS) on the system board. 12. Connect the power-supply fan cable to its connector (FAN SYS) on the system board. 13. Connect the audio cable to its connector (MB- AUDIO) on the system board and close the latch. 14. Connect the high-speed cable to its connector (MB-HS) on the system board and close the latch. 15. Connect the power cable to its connector (MB-PWR) on the system board and close the latch. 16. Connect the display cable to its connector (LVDS) on the system board.
Next steps 1. Install the processor. 2. Install the heat sink. 3. Install the wireless card. 4. Install the M.2 2230 solid-state drive in slot 0 or the M.2 2280 solid-state drive in slot 0, whichever is applicable. 5. Install the M.2 2230 solid-state drive in slot 1 or the M.2 2280 solid-state drive in slot 1, whichever is applicable. 6. Install the I/O bracket. 7. Install the bottom cover. 8. Install the I/O cover. 9. Install the system-board shield.
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10. Install the graphics card. 11. Install the memory. 12. Install the back cover. 13. Install the stand. 14. Follow the procedure in After working inside your computer.
Power-button and I/O board
Removing the power-button and I/O board
CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover. 6. Remove the bottom cover. 7. Remove the I/O bracket. About this task The following image indicates the location of the power-button and I/O board and provides a visual representation of the removal procedure.
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Figure 71. Removing the power-button and I/O board
Steps 1. Remove the three screws (M3x5) that secure the power-button and I/O board shield to the display-assembly base. 2. Lift the power-button and I/O board shield off the display-assembly base. 3. Lift the latch and disconnect the power cable from its connector (DB-PWR) on the power-button and I/O board. 4. Lift the latch and disconnect the high-speed cable from its connector (DB- HS) on the power-button and I/O board. 5. Remove the two screws (M3x5) that secure the power-button and I/O board to the display-assembly base. 6. Lift the power-button and I/O board off the display-assembly base.
Installing the power-button and I/O board
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
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About this task The following image indicates the location of the power-button and I/O board and provides a visual representation of the installation procedure.
Figure 72. Installing the power-button and I/O board Steps 1. Place the power- button and I/O board on the display-assembly base. 2. Align the screw holes on the power-button and I/O board with the screw holes on the display-assembly base. 3. Replace the two screws (M3x5) that secure the power-button and I/O board to the display-assembly base. 4. Connect the power cable to its connector (DB-PWR) on the power-button and I/O board and close the latch. 5. Connect the high-speed cable to its connector (DB-PWR) on the power-button and I/O board and close the latch. 6. Place the power-button and I/O board shield on the display-assembly base. 7. Align the screw holes on the power-button and I/O board shield with the screw holes on the display-assembly base. 8. Replace the three screws (M3x5) that secure the power-button and I/O board shield to the display-assembly base. Next steps 1. Install the I/O bracket. 2. Install the bottom cover. 3. Install the I/O cover.
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4. Install the system-board shield. 5. Install the back cover. 6. Install the stand. 7. Follow the procedure in After working inside your computer.
Audio board
Removing the audio board
CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the system-board shield. 5. Remove the I/O cover. 6. Remove the bottom cover. 7. Remove the I/O bracket. About this task The following image indicates the location of the audio board and provides a visual representation of the removal procedure.
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Figure 73. Removing the audio board
Steps 1. Remove the three screws (M3x5) that secure the audio board shield to the display-assembly base. 2. Lift the audio-board shield off the display- assembly base. 3. Lift the latch and disconnect the audio cable from its connector (DB-AUDIO) on the audio board. 4. Disconnect the speaker cable from its connector (INT SPKR) on the audio board. 5. Remove the two screws (M3x5) that secure the audio board to the display-assembly base. 6. Lift the audio board off the display-assembly base.
Installing the audio board
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
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About this task The following image indicates the location of the audio board and provides a visual representation of the installation procedure.
Figure 74. Installing the audio board Steps 1. Place the audio board on the display-assembly base. 2. Align the screw holes on the audio board with the screw holes on the display-assembly base. 3. Replace the two screws (M3x5) that secure the audio board to the display-assembly base. 4. Connect the power cable to its connector (DB-PWR) on the audio board and close the latch. 5. Connect the high-speed cable (DB-PWR) to the audio board and close the latch. 6. Place the audio-board shield on the display-assembly base. 7. Align the screw holes on the audio-board shield with the screw holes on the display- assembly base. 8. Replace the three screws (M3x5) that secure the audio-board shield to the display-assembly base. Next steps 1. Install the I/O bracket. 2. Install the bottom cover. 3. Install the I/O cover. 4. Install the system- board shield. 106 Removing and installing Field Replaceable Units (FRUs)

5. Install the back cover. 6. Install the stand. 7. Follow the procedure in After working inside your computer.
Display-assembly base
Removing the display-assembly base
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the back cover. 4. Remove the graphics card. 5. Remove the system-board shield. 6. Re

References

• Dell - Dell Linux - Community Web
• Dell - Dell Linux - Community Web

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