P2725HE 27 Inch USB-C Hub Monitor

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Product Information

Specifications

• Model: P2725HE
• Version: 01
• Date: 2024/03/01
• Certifications: RoHS Directive, Lead-Free produced

Product Usage Instructions

Important Safety Notice

Ensure the following safety precautions are taken when using the
product:

• Use only approved critical components for replacements.

• Always connect the product to an authorized power cord.

• Turn off the master power switch before removing the AC power
  cord.

• Avoid exposing the product to water or extremely high humidity
  environments.

• Use only original manufacturer’s specified parts for
  reliability.

• Place replaced parts on the components side of PWBA, not the
  solder side.

• Use a proper screwdriver following specified torque and force
  for assembly and disassembly.

• Use Lead-Free solder for mounting parts.

Exploded View Diagram with List of Items

Refer to the list of items provided for assembly and disassembly
procedures.

Wiring Connectivity Diagram

Refer to the interface board diagram for wiring connections.

How to Connect and Disconnect Power Cable/Connectivity

Cable

Switch off the power before unplugging or replugging any
cables.

Disassembly and Assembly Procedures

Follow the below steps for disassembly:

1. Remove the monitor stand base by placing the monitor on a soft
   cloth or cushion, pressing and holding the stand-release button,
   and lifting the stand away from the monitor.

2. Lift the rear cover carefully and disconnect the key.

Note:

This Disassembly and Assembly Procedures are for EMEA only.
Warranty may be void if disassembly is done on the monitors.

Tool Required

List of tools for disassembly:

• Screwdriver (Phillip head) #1
• Screwdriver (Phillip head) #2
• Penknife
• Soldering iron and absorber

FAQ

Where can I find replacement power cord, connectivity cable, or

external power supply?

Contact Dell for replacement parts:

1. Go to Dell
   Support.

2. Verify your country or region.

3. Select the appropriate service or support link based on your
   need.

4. Choose a convenient method to contact Dell.

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Service Manual – P2725HE
Version: 01 Date: 2024/03/01

1. Important Safety Notice

Product Announcement: This product is certificated to meet RoHS Directive and Lead-Free produced definition. Using approved critical components only is recommended when the situation to replace defective parts. Vender assumes no liability express or implied, arising out of any unauthorized modification of design or replacing non-RoHS parts. Service providers assume all liability.
Qualified Repairability: Proper service and repair is important to the safe, reliable operation of all series products. The service providers recommended by vender should be aware of notices listed in this service manual in order to minimize the risk of personal injury when perform service procedures. Furthermore, the possible existed improper repairing method may damage equipment or products. It is recommended that service engineers should have repairing knowledge, experience, as well as appropriate product training per new model before performing the service procedures.
NOTICE: ! To avoid electrical shocks, the products should be
connected to an authorized power cord, and turn off the master power switch each time before removing the AC power cord. ! To prevent the product away from water or expose in extremely high humility environment. ! To ensure the continued reliability of this product, use only original manufacturer’s specified parts. ! To ensure following safety repairing behavior, put the replaced part on the components side of PWBA, not solder side.

! To ensure using a proper screwdriver, follow the torque and force listed in assembly and disassembly procedures to unscrew screws.
! Using Lead-Free solder to well mounted the parts.
! The fusion point of Lead-Free solder requested in the degree of 220°C.

2. Exploded view diagram with list of items

14

15

16

Item 1 2 3 4 5
6
7 8 9
10 11 12
13
14 15
16

Description
Panel Middle Frame
USB BD Panel Mylar Power BD Interface BD Main Bracket IO Connector Cover Key BD
Joystick button Back cover Riser ASSY Base ASSY Power cable DisplayPort 1.4 cable(1.8 meter) USB Type-C 3.2 Gen2 cable(1 meter)

Q’ty 1 1
1 1 1
1
1 1 1 1 1
1
1
1 1
1

Remark
ForEMEAOnly,notfor otherregions
See “NOTE” See “NOTE” See “NOTE”

NOTE: For replacement of power cord, connectivity cable and external power supply (if applicable), contact Dell: 1. Go to https://www.dell.com/support. 2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page. 3. Click Contact Us next to the country dropdown. 4. Select the appropriate service or support link based on your need. 5. Choose the method of contacting Dell that is convenient for you.

3. Wiring Connectivity Diagram
Interface Board

4. How to connect and disconnect power cable/ connectivity cable
WARNING: To change power cable/ connectivity cable, switch off power before unplugging the cable and replugging in required cable.

4. How to connect and disconnect power cable/ connectivity cable

5. Disassembly and Assembly Procedures

NOTE: This “Disassembly and Assembly Procedures” is for EMEA only, not for other regions. Please note that Dell will deem warranty void if any disassembly is done on the monitors.
Tool Required: List the type and size of the tools that would typically can be used to disassemble the product to a point where components and materials requiring selective treatment can be removed. Tool Description: – Screwdriver(Phillip head) #1 – Screwdriver(Phillip head) #2 – Penknife – Soldering iron and absorber 5.1 Disassembly Procedures:
Remove the monitor stand base:
S1 1. Place the monitor on a soft cloth or cushion. 2. Press and hold the stand-release button.
3. Lift the stand up and away from the monitor.

Lift the rear cover up carefully. Disconnect the key
S4 cable and USB FFC cable from the connectors of
the interface board, and then remove the rear cover.
Put the rear cover into a fixture jip, then release the key cable by tearing off the tapes. Use a Philips-
S5 head screwdriver to remove 1pcs screws for
unlocking the joystick key board with the rear cover. (No.1 screw size=M2x3.3,Torque=1±0.2kgfxcm)

Use a Philips-head screwdriver to remove four
S2 screws for unlocking mechanisms. (No.1~4 screw size=M4x10; Torque=10±1kgfxcm)

2

3

1

4

1

Wedge your fingers between the rear cover and the middle bezel on the corners of the top side of the
S3 monitor to release the rear cover, then use one hand to press the middle bezel, the other hand to pull up carefully the rear cover in order of arrow preference for unlocking mechanisms of rear cover..
1

2

2

Tear off 2pcs aluminum foil, then use a Philips-head
screwdriver to remove 1pcs screw for unlocking the
S6 USB unit, then disconnect the USB cable away from
the board and release the USB board unit.
(No.1 screw size=M3x6, Torque=4±1kgfxcm)

3

5. Disassembly and Assembly Procedures
S10 Lift up the middle frame away from the panel module and put it aside.
1

Use a Philips-head screwdriver to remove 13pcs
S7 screws for unlocking the middle frame with the panel. (No.1~13 screw size=M3x4, Torque=5±1kgfxcm)

2

4

1

5

3

8

9

6

7

S8

13 10

12 11

Release the IO cover from the hooks of the main bracket chassis and put it aside.

Use a Philips-head screwdriver to remove 2pcs
S11 screws for unlocking the bracket chassis with the panel. (No.1~2 Screw size= M3x3, Torque=5±1kgfxcm)

1

2

S12

Push the earing -locks and disconnect the LVDS cable from the connector of the panel module, then lift up and take away the bracket chassis module and then put it on a cushion for later disassembling.

Disconnect the panel lamp cable from the

S9

connectors of the panel and interface board, then tear off the tapes and release the lamp cable from

the hook of middle frame.

5. Disassembly and Assembly Procedures
S15 Remove the black Mylar sheet from the hooks of the main bracket as the picture below shown.

S16

Use a Philips-head screwdriver to remove 5pcs screws for unlocking the power board and interface board, and then release all the cables from the hooks. (No.1~4 screw size=M3x6, Torque=5±1kgfxcm; No.5 screw size=M4x8, Torque=5±1kgfxcm)

6 7

3

2

5

14

S17

Remove the interface board and power board from the bracket chassis module carefully, and disconnect all the cables.

5. Disassembly and Assembly Procedures

5.2 Assembly Procedures: Place a bracket chassis base on a protective
S1 cushion, then paste 4pcs silicon sheet on the position as the picture below shown.

Take a mylar to insert the hooks of the bracket to
S5 cover the power board.

Turn over a power board and put the power board
S2 into the correct position of the bracket chassis base as the picture below shown.

Panel preparation: Take out 1pcs panel from the carton and then examine the panel surface according to inspection criteria. Tear off the
S6 protective film of the panel screen, and then turn
over the panel to place screen faced down for later assembling.

Take a interface board, connect a LVDS cable to the connector of the interface board, then connect the cable of the power board to the connector of the interface board. Turn over the interface board and
S3 locate it into the bracket. Use a Philips-head screwdriver to tighten 7pcs screws for locking the power board and interface board. (No.1 screw size=M4x8, Torque=5±1kgfxcm; No.2~7 screw size=M3x6, Torque=5±1kgfxcm)
Put the bracket chassis module on the back of LCD module, then push the earing-locks and connect
S7 LVDS cable and panel lamp cable to the connectors
of the panel module.

6 7

3

2

5

14

5. Disassembly and Assembly Procedures

Use a Philips-head screwdriver to tighten 2pcs
S8 screws for locking the bracket with panel module. (No.1~2 screw size=M3x4, Torque=5±1kgfxcm)

1

2

Take 1pcs middle frame to assemble the panel
S9 module, then adjust the middle bezel for two parts firmly attachment.

S12

Use a Philips-head screwdriver to tighten 13pcs screws for locking the middle frame with the panel. (No.1~13 screw size=M3x4, Torque=5±1kgfxcm)

2 8 6

4

1

5

3 9
7

13 10

12 11

S13

Take 1pcs USB board and 1pcs connect cable. Connect the cable to the USB board, then locate the USB board into the hook of the middle frame. Use a Philips-head screwdriver to tighten one screw for locking the USB unit with middle frame, then connect the USB cable to the connector of interface board, then fix the cable by tape on the back of the cable. Paste 2pcs AL foil on the correct position to fix the cables. (No.1 screw size=M3x6, Torque=4±1kgfxcm)

Take 1pcs panel lamp cable to connect the panel

and interface board, then locate the panel lamp

S10 cable to the hook of the middle frame and fix the

1

lamp cable on the back of panel by the tapes on the

back of the cable.

Take 1pcs IO cover to locate the hooks of the
S11 bracket chassis module as the picture below shown.

S14

Take 1pcs joystick key, 1pcs joystick board and 1pcs joystick cable, then assemble the joystick key with board, and then connect the cable to the connector of the joystick board.

5. Disassembly and Assembly Procedures

S15

Locate the joystick board to the correct position of the rear cover, then use a Philips-head screwdriver to tighten 1pcs screw for locking the joystick board with rear cover, then fix the key cable with 2pcs tapes. (No.1 screw size=M2x3.3,Torque=1±0.2kgfxcm)

1

S17

Use a Philips-head screwdriver to tighten 4pcs screws for locking rear cover with the assembled unit. Paste 2pcs labels and insert 1pcs DP cap on the specific positions as the picture below shown. (No.1~4 screw size=M4x10; Torque=10±1kgfxcm)

2

3

4

1

S18

Take 1pcs assembled stand base, then fit the two tabs on the upper part of the stand into the grooves on the back of the monitor, and then press the stand so that the monitor mounting area snaps onto the stand.

S16

Move the assembled rear cover close to the panel, then connect the joystick cable to the connector of interface board. Put down the rear cover and push the rear cover on the positions marked as the picture below shown for mechanisms engagement.

S19

Lift up the monitor, then provide power supply and a video signal to the monitor, then turn on the monitor for functionality check.

6. Trouble Shooting Instructions
Troubleshooting
WARNING: Before you begin any of the procedures in this section, follow the Safety instructions.
Sel f-test
Your monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If yo ur monitor and computer are properly connected but the monitor screen remain s dark, run the monitor self- test by performing the following steps:
1. Turn o both your computer and the monitor. 2. Unplug the video cable from the computer. 3. Turn on the monitor. If the monitor cannot sense a video signal and is working correctly, the following message will appear:
or
NOTE: The message may be slightly di erent according to the connected input signal. NOTE: While in self-test mode, the power LED remains white. 4. This box also appears during normal system operation, if the video cable
becomes disconnected or damaged. 5. Turn o your monitor and reconnect the video cable; then turn on both your
computer and the monitor. If your monitor screen remains blank afte r you use the previous procedure, check your video controller and computer, becaus e your monitor is functioning properly.

6. Trouble Shooting Instructions
Built-in diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and video card.

To run the built-in diagnostics:
1. Ensure that the screen is clean (no dust particles on the surface of the screen).
2. Move or press the joystick to launch the Menu Launcher.

3. Move the joystick up to select

and open the Main Menu.

4. Move the joystick to navigate and select Others and then Self-Diagnostic. 5. Press the joystick to initiate the built-in diagnostics. A gray screen is displayed. 6. Observe if the screen has any defects or abnormalities. 7. Toggle the joystick once again until a red screen is displayed.

8. Observe if the screen has any defects or abnormalities.

9. Repeat steps 7 and 8 until the screen displays green, blue, black, and white colors. Note any abnormalities or defects.

The test is complete when a text screen is displayed. To exit, toggle the joystick control again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card and computer.

6. Trouble Shooting Instructions

Common problems
The following table contains general info rmation about common monitor problems you might encounter and the possible solutions:

Common symptoms No video/power LED o
No video/power LED on
Poor focus
Shaky/jittery video

What you experience

Possible solutions

No picture

· Ensure that the video cable connecting the monitor and the computer is properly connected and secure.

· Verify that the power outlet is functioning properly using any other electrical equipment.

· Ensure that the power button is pressed fully.

· Ensure that the correct input source is selected in the Input Source menu.

No picture or no · Increase brightness and contrast

brightness

controls using the OSD.

· Perform monitor self-test feature check.

· Check for bent or broken pins in the video cable connector.

· Run the built-in diagnostics. For more information, see Built-in diagnostics.

· Ensure that the correct input source is selected in the Input Source menu.

Picture is fuzzy, · Eliminate video extension cables. blurry, or ghosting · Reset the monitor to factory settings.

· Change the video resolution to the correct aspect ratio.

Wavy picture or ne movement

· Reset the monitor to factory settings. · Check environmental factors.

· Relocate the monitor and test in another room.

6. Trouble Shooting Instructions

Missing pixels
Stuck-on pixels
Brightness problems Geometric distortion Horizontal/ vertical lines

LCD screen has spots
LCD screen has bright spots
Picture too dim or too bright Screen not centered correctl y Screen has one or more lines

·CyclepoweOr n-O. · Pixel that is permanently o is a
natural defect that can occur in LCD technology. · For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: www.dell.com/ pixelguidelines.
·CyclepoweOr n-O. · Pixel that is permanently o is a
natural defect that can occur in LCD technology. · For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: www.dell.com/ pixelguidelines.
· Reset the monitor to factory settings. · Adjust brightness and contrast
controls using the OSD.
Reset the monitor to factory settings.
· Reset the monitor to factory settings. · Perform monitor self-test feature
check and determine if these lines are also in self-test mode. · Check for bent or broken pins in the video cable connector. · Run the built-in diagnostics. For more information, see Built-in diagnostics.

6. Trouble Shooting Instructions

Synchronization problems
Safety related issues Intermittent problems
Missing color
Wrong color

Screen is scrambled or appears torn
Visible signs of smoke or sparks Monitor malfunctions on and o
Picture missing color
Picture color not good

· Reset the monitor to factory settings.
· Perform monitor self-test feature check to determine if the scrambled screen appears in self-test mode.
· Check for bent or broken pins in the video cable connector.
· Restart the computer in the safe mode.
· Do not perform any troubleshooting steps.
·ContacDt eilml mediately.
· Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
· Reset the monitor to factory settings.
· Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.
· Perform monitor self-test feature check.
· Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
· Check for bent or broken pins in the video cable connector.
· Change the settings of the Preset Modes in the Color menu OSD depending on the application.
· Adjust the R/G/B values under Custom Color in the Color menu OSD.
· Change the Input Color Format to RGB or YCbCr/YPbPr in the Color settings OSD.
· Run the built-in diagnostics. For more information, see Built-in diagnostics.

6. Trouble Shooting Instructions

Image retention from a static image left on the monitor for a long period of time
Video ghosting or overshooting
Picture quality (Refresh rate of native resolution changes from 60 Hz to 30 Hz; or color depth drops to 18 bits)

Faint shadow from the static image displayed appears on the screen
Video ghosting, shadows or color smear while scro l l ing
Issues of incorrect refresh rate or missing colors

· Set the screen to turn o after a few minutes of screen idle time. These can be adjusted in Windows Power Options or Mac Energy Saver setting.
· Alternatively, use a dynamically changing screensaver.
Change the Response Time in the Display menu OSD to Normal or Fast, depending on your application and usage.
·Set USB-C Prioritization to High Resolution.
· Check the resolution settings of your graphic card.

6. Trouble Shooting Instructions

Product speci c problems

Speci c symptoms

What you experience

Possible solutions

Screen image is too smal l

Image is centered on · Check the Aspect Ratio setting

screen, but does not in the Display menu OSD.

ll the entire viewing ·Resetthemonitotrofactory

area

settings.

Cannot adjust the monitor with the joystick

OSD does not

· Turn o the monitor, unplug the

appear on the screen power cord, plug it back, and then

turn on the monitor.

· Check whether the OSD menu is locked. If yes, move and hold the joystick up/down/left/right for 4 seconds to unlock (see Lock and Locking the control buttons).

No input signal when you press the power button or toggle the joystick

No picture, the LED light is white

· Check the signal source. Ensure the computer is not in the power saving mode by moving the mouse or pressing any key on the keyboard.

· Check whether the signal cable is plugged in properly. Re-plug the signal cable if necessary.

· Reset the computer or video player.

The picture does not The picture cannot · Due to di erent video formats

ll the entire screen ll the height or

(aspect ratio) of DVDs, the

width of the screen monitor may display in full screen.

· Run the built-in diagnostics. For more information, see Built-in diagnostics.

6. Trouble Shooting Instructions

No video at HDMI/ DisplayPort/USB Type-C port
No network connection
The LAN port is not functioning

When connected to Unplug the HDMI/DisplayPort/USB

some dongle/

Type-C cable from dongle/docking

docking device at device, then plug the docking

the port, there is no HDMI/DisplayPort/USB Type-C

video when

cable into the notebook.

unplugging/plugging

the cable from the

notebook

Network dropped or · Check to ensure USB-C

intermittent

Prioritization is set to High

Data Speed.

· Do not turn o the display during network connection.

OS setting or cable · Ensure that the latest BIOS and

connection issue

drivers for your computer are installed on your computer.

· Ensure that the RealTek Gigabit Ethernet Controller is installed in the Windows Device Manager.

·IyfouBr IOSetuphaaLsAN/ GBE Enabled/Disabled option, make sure it is set to Enabled.

· Ensure that the Ethernet cable is connected securely on the monitor and the hub/router/ rewal l.

· Check the status LED of the Ethernet cable to con rm connectivity. Re- connect both ends of the Ethernet cable if the LED is not lit.

· First power o the computer and unplug the USB Type-C cable and the power cord from the monitor. Then, power on the computer and plug the power cord and the USB Type-C cable into the monitor.

6. Trouble Shooting Instructions

When a PS console is A message appears Change the resolution of the PS

connected, the

to notify you that the console in Safe Mode. For the

monitor is not

monitor does not information about setting up the

compatible with the support the current resolution, go to the o cial website

1080i (interlaced)

input timing.

of PlayStation.

video timing

When the rst monitor When MST is On Switch USB-C Prioritization from

is connected to your and USB-C

High Data Speed to High

PC or laptop using the Prioritization is set Resolution (USB speed reduced to

USB-C connection, to High Data

2.0).

you might not be able Speed, the

to select the optimal displayed pictures on

resolution* for the 3rd the 3rd (or more)

(or more) monitor in daisy chained

Daisy chain mode in monitor are not at

DP1.4 (DSC Disabled) the optimal

resolution*

*The optimal resolution for P2425HE/P2425HE WOST/P2725HE is 1920 x 1080 at 60 Hz; the optimal resolution for P2425E is 1920 x 1200 at 60 Hz.

6. Trouble Shooting Instructions

Universal Serial Bus (USB) speci c problems

Speci c symptoms USB interface is not working
USB Type-C port does not supply power
Super speed USB 5 Gbps (USB 3.2 Gen1) interface is slow

What you experience

Possible solutions

USB peripherals are not working

· Check that your monitor is turned On.
· Reconnect the upstream cable to your computer.

· Reconnect the USB peripherals (downstream connector).

· Switch o and then turn on the monitor again.

· Reboot the computer.

· Some USB devices like external portable HDD require higher electric current; connect the device directly to the computer system.

USB peripherals · Check that the connected device is can not be charged compliant with the USB-C
speci cation. The USB Type-C port (video and data) with icon supports USB 3.2 Gen1 and an output of 90 W.

· Check that you use the USB Type-C cable shipped with your monitor.

Super speed USB 5 Gbps (USB 3.2 Gen1) peripherals working slowly or not working at all

· Check that your computer is super speed USB 5 Gbps (USB 3.2 Gen1)compatible.
· Some computers have USB 3.2, USB 2.0, and USB 1.1 ports. Ensure that the correct USB port is used.

· Reconnect the upstream cable to your computer.

· Reconnect the USB peripherals (downstream connector).

· Reboot the computer.

6. Trouble Shooting Instructions

Wireless USB peripherals stop working when a USB 3.2 device is plugged in
Wireless USB mouse does not work properly

Wireless USB

· Increase the distance between the

peripherals

USB 3.2 peripherals and the wireless

responding slowly USB receiver.

or only working as · Position your wireless USB receiver as

the distance

close as possible to the wireless USB

between itself and peripherals.

its receiver decreases

· Use a USB-extender cable to position the wireless USB receiver as far away

as possible from the USB 3.2 port.

When plugged into Unplug the Wireless USB Mouse receiver one of the USB and re-plug it into one of the Quick ports on the rear Access USB ports at the bottom of the side of the monitor, monitor. the Wireless USB mouse lags or freezes during use

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