Lenovo ThinkCentre PC neo 50a 2 Gen 3 PC Instruction Manual

ThinkCentre PC neo 50a 2 Gen 3 PC

ThinkCentre neo 50a 24 Gen 3 Hardware Maintenance Manual

First Edition (August 2022)
© Copyright Lenovo 2022.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS- 35F-05925.

About this manual

This manual provides service and reference information for ThinkCentre® computers listed on the front cover.

Illustrations in this manual might look different from your product.
Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important: This manual is intended only for trained service technicians who are familiar with ThinkCentre computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkCentre computer, be sure to read and understand Chapter 1 “Important safety information” on page 1.

Chapter 1.Important safety information

General safety

Follow these rules to ensure general safety:

• Observe good housekeeping in the area of the machines during and after maintenance.

• When lifting any heavy object:
  1. Ensure you can stand safely without slipping.
  2. Distribute the weight of the object equally between your feet.
  3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.
  4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back.
  Attention: Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you.

• Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

• Before you start the machine, ensure that other service representatives and the customer’s personnel are not in a hazardous position.

• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine.

• Keep your tool case away from walk areas so that other people will not trip over it.

• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.

• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately 8 centimeters (3 inches) from the end.

• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
  Remember: Metal objects are good electrical conductors.

• Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

• Reinstall all covers correctly before returning the machine to the customer.

CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.

CAUTION:
Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

Electrical safety

CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.
Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.

• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

• Disconnect all power before:
  –Performing a mechanical inspection
  –Working near power supplies
  –Removing or installing Field Replaceable Units (FRUs)

• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine and to lock the wall box in the off position.

• If you need to work on a machine that has exposed electrical circuits, observe the following precautions:
  – Ensure that another person, familiar with the power-off controls, is near you. Remember: Another person must be there to switch off the power, if necessary.
  – Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back.
  Remember: There must be a complete circuit to cause electrical shock. By observing the above rule, you may prevent a current from passing through your body.
  – When using a tester, set the controls correctly and use the approved probe leads and accessories for that tester.
  – Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.
  Observe the special safety precautions when you work with very high voltages; these instructions are in the safety sections of maintenance information. Use extreme care when measuring high voltages.

• Regularly inspect and maintain your electrical hand tools for safe operational condition.

• Do not use worn or broken tools and testers.

• Never assume that power has been disconnected from a circuit. First, check that it has been powered-off.

• Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, non-grounded power extension cables, power surges, and missing safety grounds.

• Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage.

• Do not service the following parts with the power on when they are removed from their normal operating places in a machine:
  – Power supply units
  – Pumps
  – Blowers and fans
  – Motor generators and similar units. (This practice ensures correct grounding of the units.)

• If an electrical accident occurs:
  – Use caution; do not become a victim yourself.
  – Switch off power.
  – Send another person to get medical aid.

Safety inspection guide

The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these products. Each machine, as it was designed and built, had required safety items installed to protect users and service personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide.

If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

Consider these conditions and the safety hazards they present:

• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock).
• Explosive hazards, such as a damaged CRT face or bulging capacitor
• Mechanical hazards, such as loose or missing hardware

The guide consists of a series of steps presented in a checklist. Begin the checks with the power off, and the power cord disconnected.

Checklist:

1. Check exterior covers for damage (loose, broken, or sharp edges).

2. Power-off the computer. Disconnect the power cord.

3. Check the power cord for:
   a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and frame ground.
   b. The power cord should be the appropriate type as specified in the parts listings.
   c. Insulation must not be frayed or worn.

4. Remove the cover.

5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.

6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

7. Check for worn, frayed, or pinched cables.

8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Handling electrostatic discharge-sensitive devices

Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.

Notes:
1. Use product-specific ESD procedures when they exceed the requirements noted here.
2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts:

• Keep the parts in protective packages until they are inserted into the product.
• Avoid contact with other people while handling the part.
• Wear a grounded wrist strap against your skin to eliminate static on your body.
• Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap.
• Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially useful when handling ESD-sensitive devices.
• Select a grounding system, such as those listed below, to provide protection that meets the specific service requirement.
  Note: The use of a grounding system is desirable but not required to protect against ESD damage.
  – Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.
  – Use an ESD common ground or reference point when working on a double- insulated or battery- operated system. You can use coax or connector-outside shells on these systems.
  – Use the round ground-prong of the ac plug on ac-operated computers.

Grounding requirements

Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

Safety notices (multi-lingual translations)

The caution and danger safety notices in this section are provided in the following languages:

• English
• Arabic
• Brazilian/Portuguese
• Chinese (simplified)
• Chinese (traditional)
• French
• German
• Hebrew
• Italian
• Korean

Chapter 2. Important service information

Strategy for replacing FRUs

Before replacing parts:
Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace any FRUs listed in this manual.
After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before you complete the service action.
To download and install software fixes, drivers, and UEFI BIOS, go to https://pcsupport.lenovo.com and follow the instructions on the screen.

Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:

• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the original FRU before you continue.
• Some computers have both a processor board and a system board. If you are instructed to replace either the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one.
• If an adapter or a device consists of more than one FRU, any of the FRUs might be the cause of the error. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the FRU that changed the symptoms.

Strategy for replacing a hard disk drive or a solid-state drive

Always try to run a low-level format operation before replacing a hard disk drive or a solid-state drive. This will cause all customer data on the drive to be lost. Ensure that the customer has a current backup of the data before you perform this task.

Attention: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

Important notice for replacing a system board

Some components mounted on a system board are very sensitive. Improper handling of a system board can cause damage to those components, and may cause a system malfunction.

After replacing the system board, use the Golden Key U1 tool to bind the model type, serial number, and Brand ID of the computer with the new system board. Refer to https://support.lenovo.com/us/en/solutions/ht507251 for instructions.

Attention: When handling a system board:
• Do not drop a system board or apply any excessive force to it.
• Avoid rough handling of any kind.
• Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset.

How to use error codes

Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code might also cause false error codes. If no error code is displayed, see whether the error symptom is listed in the “Symptom-to-FRU Index” section.

Strategy for replacing FRUs for CTO, special-bid, and standard models
This topic provides information about the model types and FRU identification.

Product definition
This topic introduces different model types and how to identify each type.

Dynamic Configure To Order (CTO) model

This model provides the ability for a customer to configure a Lenovo solution from a Web site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code. The model is “CTO1” and the default country code is “WW” (example: 20AACTO1WW).

Special-bid model

This model is a unique configuration that has been negotiated between Lenovo and the customer. A unique MTM consists of a 4-character MT, a 4-character model, and a numeric 2-character country code is provided to the customer to place orders (example: 20AA000955). The country code assigned is numeric and does not designate a specific country or region. The custom model factsheet for the MTM indicates which country the special-bid MTM is set up for. Special-bid offering is not generally announced.

Standard model

Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country code. The country code assigned is alphabetic and represents a designated country or region (example: 20AA0009UK).

FRU identification

To identify FRUs for a product, do the following:
1. Go to: https://support.lenovo.com/partslookup.
2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for more detailed FRU information.

Chapter 3.Product overview

Overview

Item Description Item Description
1 Infrared (IR) camera, AI camera or Integrated camera
2 Multi-touch screen
3 Switch button
4 Power button
5 Internal speaker
6 USB-A 3.2 Gen 1 connector
7 Optical drive activity indicator
8 Optical drive eject button

• for selected models

Rear

Item Description

1 Power connector
2 Combo audio jack
3 HDMI™ in connector
4 Ethernet connector
5 HDMI out connector
6 USB-A 2.0 connector
7 Always On USB-A 3.2 Gen 2 connector
8 USB-C® (3.2 Gen 2) connectors
9 USB-C (power) connector (with USB 2.0 data transfer rate)
10 Security-lock slot

Chapter 4.Service checkout and symptom-to-FRU index

This chapter provides information about general service checkout and symptom- to-FRU index.

Service checkout

Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.

General error messages appear if a problem or conflict is found by a program, the operating system, or both. For an explanation of these messages, refer to the information supplied with that software package.

Use the following procedure to help determine the cause of the problem:

1. Turn off the computer and all external devices.

2. Check all cables and power cords.

3. Set all display controls to the middle position.

4. Turn on all external devices.

5. Turn on the computer.
   • Look for displayed error codes.
   • Listen for beep codes.
   • Look for readable instructions or a main menu on the display.
   If you did not receive the correct response, proceed to step 6 on page 31.
   If you do receive the correct response, proceed to step 7 on page 31.

7. Look at the following conditions and follow the instructions:
   • If you hear beep codes during POST, go to “Beep symptoms” on page 33.
   • If the computer displays a POST error, go to “POST error codes” on page 34.
   • If the computer hangs and no error is displayed, continue at step 7 on page

9. Run the Diagnostic programs. See Chapter 5 “Diagnostics” on page 39.
   • If you receive an error, replace the part that the diagnostic program calls out.
   • If the test stops and you cannot continue, replace the last device tested.

Problem determination tips

Due to the variety of hardware and software combinations that can be encountered, use the following information to assist you in problem determination. If possible, have this information available when requesting assistance from Service Support and Engineering functions.

• Machine type and model

• Processor or hard disk drive upgrades

• Failure symptom
  – Do diagnostics indicate a failure?
  – What, when, where, single, or multiple systems?
  – Is the failure repeatable?
  – Has this configuration ever worked?
  – If it has been working, what changes were made prior to its failing?
  – Is this the original reported failure?

• Diagnostics version
  – Type and version level

• Hardware configuration
  – Print (print screen) configuration currently in use
  – BIOS level

• Operating system software
  – Type and version level

Notes: To eliminate confusion, identical systems are considered identical only if they:

1. Are the exact machine type and models
2. Have the same BIOS level
3. Have the same adapters/attachments in the same locations
4. Have the same address jumpers/terminators/cabling
5. Have the same software versions and levels
6. Have the same Diagnostic Diskettes (version)
7. Have the same configuration options set in the system
8. Have the same setup for the operating system control files

Comparing the configuration and software set-up between “working and non- working” systems will often lead to problem resolution.

Symptom-to-FRU index

The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with “Service checkout” on page 31. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to “Undetermined problems” on page 37.

Notes:

• The Symptom-to-FRU index is not specific to any machine type and are applicable to all computers.
• If you have both an error message and an incorrect audio response, diagnose the error message first.
• If you cannot run the diagnostic tests or you get a diagnostic error code when running a test, but did receive a POST error message, diagnose the POST error message first.
• If you did not receive any error message, look for a description of your error symptoms in the first part of this index.

Hard disk drive boot error

A hard disk drive boot error can have the following causes.

Check the configuration and ensure that the start-up drive is in the boot sequence.

No operating system installed on the boot drive.|

Install an operating system on the boot drive.

The boot sector on the startup drive is corrupted.|

The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk drive.
2. Using the operating system programs, format the hard disk drive.

The drive is defective.|

Replace the hard disk drive.

Power supply problems

If you suspect a power problem, use the following procedures.

Check the following for proper installation.
• Power cord
• On/Off switch connector
• On/Off switch power supply connector
• System board power supply connectors
• Microprocessor connection|

Reseat connectors

Check the power cord for continuity.| Power cord
Check the power-on switch for continuity.| Power-on switch

Beep symptoms

Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.
The following table describes the beep symptoms.

Common POST error code. See the detailed failure information in “POST error codes” on page 34.

3 short and 1 long beeps: DRAM memory error|

Perform the following actions in order:
1. Make sure that the memory modules are properly seated in the memory slots.
2. Replace the memory modules.
3. Replace the system board (for trained service personnel only).

4 long beeps: insufficient shadow RAM resources for option ROM (error code: 8998) or PCIe/PCI MMIO (memory mapped input/output) resources (error code: 8999)|

See the detailed failure information in “POST error codes” on page 34.

2 long and 3 short beeps: graphics card error|

Perform the following actions in order:
1. Make sure that the graphics cards are properly seated in the slots.
2. Replace the graphics cards.
3. Replace the system board (for trained service personnel only).

POST error codes

Each time you turn on the system, it performs a series of tests that check the operation of the system and some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following operations:

• Some basic system-board operations
• Memory operation
• Video operation
• Whether the boot drive is working

If the POST detects a problem, an error message appears on the screen. A single problem might cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time.

Error code| POST error message|

Description/Action

---|---|---
135| CPU fan failure System fan failure Power fan failure Front fan failure Rear fan failure Auxiliary fan failure ODD fan failure|

This error message is displayed when a fan fails and the system might be overheating.
Press F10 to exit.

162| Setup data integrity check failure|

This error indicates the checksum of BIOS Setup data in NVRAM is bad.
In BIOS Setup, the “Save Changes and Exit” operation is needed in order to clear this error.

164| Memory configuration change has occurred|

This error message is displayed when the memory size is changed.
Press F10 to exit.

1762| Storage device configuration change has occurred|

This error message is displayed when a hard disk drive change or an optical drive change has been made.
Press F10 to exit.

8998| Not enough shadow RAM resources for OPTION ROM, not all devices initialized. Suggest to remove some add-on cards, or change to UEFI mode in BIOS setup.|

This error message is displayed when the shadow RAM resources for option ROM are insufficient.
If the legacy option ROM is insufficient, remove some add-in cards.
For the system that supports UEFI, set UEFI as the first priority.

8999| Not enough PCIe/PCI MMIO resources. Currently only one video card is enabled. Remove some PCIe cards.|

This error message is displayed when the PCIe/PCI MMIO (memory mapped input/output) resources are insufficient.
Remove some add-in cards.

Miscellaneous error conditions

1. Power Switch
2. System Board
3. Riser card, if installed.

Computer will not RPL from server|

1.Ensure that the network is in startup sequence as the first device or the first device after diskette.
2.Ensure that the network adapter is enabled for RPL.
3.Network adapter (Advise network administrator of new MAC address)

Computer will not perform a Wake On LAN® (if applicable|

1. Check the power supply and signal cable connections to the network adapter.
2. Ensure that the operating system settings are set to enable Wake on LAN.
3. Ensure that the Wake On LAN feature is enabled in Setup/Configuration.
4. Ensure that the network administrator is using the correct MAC address.
5. Ensure no interrupt or I/O address conflicts.
6. Network adapter (advise network administrator of new MAC address)

Dead computer. See “Hard disk drive boot error” on page 32.|

1. Power Supply
2. System Board

Diskette drive in-use light remains on or does not light when drive is active.|

1. Diskette Drive
2. System Board
3. Diskette Drive Cable

1.System Board
2.Primary Hard Disk Drive
3.Hard Disk Drive Cable

Incorrect memory size during POST|

1.Run the Memory tests.
2.Memory Module
3. System Board

“Insert a Diskette” icon appears with a known-good diagnostics diskette in the first 3.5-inch diskette drive.|

1.System Board
2.Diskette Drive Cable
3.Network Adapter

Intensity or color varies from left to right of characters and color bars|

1.Display
2.Video adapter (if present)
3.System Board

No power or fan not running|

1. See “Hard disk drive boot error” on page 32.

Non-system disk or disk error-type message with a known-good diagnostic diskette.|

1.Diskette Drive
2.System Board
3.Diskette Drive Cable

Other display symptoms not listed above (including blank or illegible display)| 1.Display
2.System Board
Power-on indicator or hard disk drive in-use light not on, but computer works correctly|

1.Power switch/LED assembly
2.System Board

Printer problems| 1.Printer
2.System Board
Program loads from the hard disk with a known-good diagnostics diskette in the first 3.5-inch diskette drive|

1.Run the Setup Utility program and check the Startup sequence.
2.Diskette Drive
3.Diskette Drive Cable
4.System Board
5.Power Supply

RPL computer cannot access programs from its own hard disk.|

1.If the network administrator is using LCCM Hybrid RPL, check the startup sequence:
a.First device – network
b.Second device – hard disk
2.Hard disk drive

RPL computer does not RPL from server|

1.Check the startup sequence.
2.Check the network adapter LED status.

Serial or parallel connector device failure (system board connector)|

1.External Device Self-Test OK?
2.External Device
3.Cable
4.System Board

Serial or parallel connector device failure (adapter connector)|

1.External Device Self-Test OK?
2.External Device
3.Cable
4.Alternate Adapter
5.System Board

Some or all keys on the keyboard do not work|

1.Keyboard
2.Keyboard Cable
3.System Board

Undetermined problems
This section provides instructions on how to find out the failing devices or adapters.

1. Turn off the computer.

2. Remove or disconnect the following components (if installed) one at a time.
   a. External devices (modem, printer, or mouse)
   b. Any adapters
   c. Memory modules
   d. Extended video memory
   e. External Cache
   f. External Cache RAM
   g. Hard disk drive
   h. Diskette drive
   3. Turn on the computer to retest the system.
   4. Repeat steps 1 through 3 until you find the failing device or adapter.

If all devices and adapters have been removed, and the problem continues, replace the system board. See Chapter 6 “Hardware removal and installation” on page 43.

Chapter 5. Diagnostics

Use diagnostic solutions to test hardware components and report operating- system-controlled settings that interfere with the correct operation of your computer.

Basic procedure for resolving computer problems

Prerequisite

Before you start, read Chapter 1 “Important safety information” on page 1and print the following instructions.

1. Check that:
   a. The cables for all connected devices are connected correctly and securely.
   b. All components have been reassembled correctly.
   c. All connected devices that require ac power are connected to properly grounded and working electrical outlets.
   d. All connected devices are enabled in UEFI BIOS.

2. Use an antivirus program to see if the computer has been infected by a virus. If the program detects a virus, remove the virus.

3. Go to “Self-help resources” on page 40and follow the instructions for the type of problem you are experiencing.

4. Run the diagnostic program.

5. Recover your operating system. See “Self-help resources” on page 40.

6. If the problem persists, contact Lenovo.

UEFI diagnostic program

A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

To run the UEFI diagnostic program, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Basic procedure for resolving computer problems” on page 39. If an error code is displayed, go to “Symptom-to-FRU index” on page 32for error code descriptions and troubleshooting hints.
2. Repeatedly press and release the F10 key when turning on the computer. The main screen of the UEFI diagnostic program is displayed.
3. Follow the instructions on the screen to use the diagnostic program.

The options on the main screen are as follows:

DIAGNOSTICS

|

TOOLS

---|---

• CPU [U] • DISPLAY [D] • MEMORY [E] • MOTHERBOARD [H] • PCI EXPRESS [P] • STORAGE [S] • AUDIO [Z] • OPTICAL [O] • RUN ALL [R]

|

• SYSTEM INFORMATION [F1] • BAD BLOCK RECOVERY [F3] • SMART INFORMATION [F5]

Note: The options on the main screen might vary, depending on the hardware configuration and the UEFI diagnostic program version preinstalled on the computer.

Lenovo diagnostic tools

For information about Lenovo diagnostic tools, go to:
https://pcsupport.lenovo.com/lenovodiagnosticsolutions

The Vantage app

The Vantage app is preinstalled on your computer. To diagnose problems with the Vantage app:
1. Type Vantage in the Windows search box and press Enter.
2. Follow the on-screen instructions and run a hardware scan.

If you are unable to isolate and resolve the problem after running the Vantage app, save and print the log files created by the program. You might need the log files when you speak to a Lenovo technical support representative.

Self-help resources

Use the following self-help resources to learn more about the computer and troubleshoot problems.

• https://www.lenovo.com/tips
• https://forums.lenovo.com

Accessibility information|

https://www.lenovo.com/accessibility

Reset or restore Windows|

• Use Lenovo recovery options.
1. Go to https://support.lenovo.com/ HowToCreateLenovoRecovery.
2. Follow the on-screen instructions.
• Use Windows recovery options.
1. Go to https://pcsupport.lenovo.com.
2. Detect your computer or manually select your computer model.
3. Navigate to the troubleshooting menu to diagnose the operating system for recovery instructions

Use the Vantage app to:
• Configure device settings.
• Download and install UEFI BIOS, drivers and firmware updates.
• Secure you computer from outside threats.
• Diagnose hardware problems.
• Check the computer warranty status.
• Access User Guide and helpful articles.
Note: The available features vary depending on the computer model.|

Type Vantage in the Windows search box.

Product documentation:
• Safety and Warranty Guide
• Generic Safety and Compliance Notices
• Setup Guide
• This User Guide
• Regulatory Notice|

Go to https://pcsupport.lenovo.com. Then, follow the on- screen instructions to filter out the documentation you want.

Lenovo Support Web site with the latest support information of the following:
• Drivers and software
• Diagnostic solutions
• Product and service warranty
• Product and parts details
• Knowledge base and frequently asked questions|

https://pcsupport.lenovo.com

Windows help information|

• Type Get Help or Tips in the Windows search box.
• Use Windows Search or the Cortana® personal assistant.
• Microsoft support Web site:
https://support.microsoft.com

Chapter 6.Hardware removal and installation

This chapter provides instructions on how to remove and install hardware for your computer.

Handling static-sensitive devices
Do not open the static-protective package containing the new part until the defective part has been removed and you are ready to install the new part. Static electricity, although harmless to you, can seriously damage computer components and options.
When you handle options and other computer components, take these precautions to avoid static-electricity damage:

• Limit your movement. Movement can cause static electricity to build up around you.
• Always handle options and other computer components carefully. Handle PCI/PCIe cards, memory modules, system boards, and microprocessors by the edges. Never touch any exposed circuitry.
• Prevent others from touching the options and other computer components.
• Touch the static-protective package containing the part to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This reduces static electricity from the package and your body before you install or replace a new part.
• When possible, remove the new part from the static-protective package, and install it directly in the computer without setting the part down. When this is not possible, place the static-protective package on a smooth, level surface and place the part on the package.
• Do not place the part on the computer cover or other metal surface.

Service tool kit

Ensure that the following common service tool kit is prepared before you service the computer.

Consumable tool

8| Polyamide tape|

Consumable tool

9| Mylar tape|

Consumable tool

10| Eraser|

Consumable tool

11| Electrical tape|

Consumable tool

12| Double-sided tape|

Consumable tool

13| Conductive tape|

Consumable tool

Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps. The hexagonal socket is used to pick up the antenna connectors.
Major FRUs and CRUs

Your computer contains the following types of CRUs and FRUs:
• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by trained service technicians at an additional cost.
• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill level. Trained service technicians can also provide service to install or replace the parts under the type of warranty designated for the customer’s machine.
• FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers choose to replace the FRUs by themselves, the product warranty might be affected.

Number| Description| Self-service CRU|

Optional-service CRU

---|---|---|---
1| Computer stand (Tilt-only stand)| Yes| No
2| Computer stand (Liftable stand)| Yes| No
3| Smart cable clip| Yes| No
4| Rear cover| No| No
5| USB board cable| No| No
6| USB board bracket| No| No
7| USB board| No| No
8| Wi-Fi card cover| No| No
9| Wi-Fi card| No| No
10| M.2 solid-state drive| No| No
11| Memory module shielding| No| No
12| Memory module| No| No
13| System board| No| No
14| Optical drive board cable| No| No
15| Optical drive board| No| No
16| Optical drive| No| No
17| Optical drive bezel| No| No
18| Optical drive bracket| No| No
19| Dummy Optical drive cover| No| No
20| Camera cover| No| No
21| Camera module| No| No
22| Dummy camera back cover| No| No
23| Main frame| No| No
24| Wi-Fi antennas| No| No
25| Power cord| Yes| No
26| Mouse| Yes| No
27| Keyboard| Yes| No
28| Front bezel| No| No
29| LCD panel| No| No
30| 2.5-inch hard disk drive foil| No| No
31| 2.5-inch hard disk drive| No| No
32| 2.5-inch hard disk drive cable| No| No
33| Backlight cable| No| No
34| Touch cable| No| No
35| LVDS cable| No| No
36| Rear cover bump| No| No
37| Microphone cable| No| No
38| Microphone bracket| No| No
39| Microphone module*| No| No
40| Optical drive housing| No| No
41| Fan| No| No
42| Speaker| No| No
43| Power switch board cable| No| No
44| Power switch board| No| No
45| Power supply unit| No| No
46| System board shielding| No| No
47| Power supply unit socket bracket| No| No
48| Gaskets| No| No
49| Heat sink| No| No
50| thermal pads| No| No
51| Speaker screws| No| No

• For selected models

For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go to: http://www.lenovo.com/serviceparts-lookup

System board

1 M.2 Wi-Fi card slot
2 PSU ID PIN connector
3 PSU Micro Fit connector
4 Fan connectors (2)
5 Wireless charging connector
6 M.2 solid-state drive slot
7 Touch cable connector
8 Microphone board connector
9 Camera connector
10 USB board connector
11 Memory slot (DIMM1)
12 Memory slot (DIMM2)
13 Microprocessor
14 GPU
15 Internal speaker connector
16 40–pin LVDS connector (reserved)
17 30–pin LVDS connector (reserved)
18 Power switch board connector
19 LVDS connector (for FHD models)
20 Backlight connector
21 Coin-cell battery connector
22 Coin-cell battery

Removing and installing hardware

This section provides instructions on how to remove and install hardware for your computer. You can expand the capabilities of your computer and maintain your computer by removing or installing hardware.
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Important safety information” on page 1.

External options

You can connect external options to your computer, such as external speakers, a printer, or a scanner. For some external options, you must install additional software in addition to making the physical connection. When installing an external option, see Chapter 3 “Product overview” on page 29to identify the required connector. Then, use the instructions that come with the option to help you make the connection and install any required software or device drivers.

Computer stand

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Disconnect the computer from ac power and all connected cables.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.

Replacement procedure
Depending on your computer stand, refer to one of the following to replace the computer stand.
• Tilt-only stand

Rear cover

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.

Removal steps
CAUTION: Do not lift the bottom of the LCD panel so that the integrated camera and microphone module will not be broken.

Note:If a locking device is available, use it to lock the computer after installing the rear cover.

USB board

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.

Removal steps

System board shielding

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.

3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.

Removal steps

M.2 solid-state drive and thermal pad

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
Attention:
• To replace the Intel Optane memory, go to https://support.lenovo.com/docs/tg_ssd.
• Do not attempt to replace the Intel Optane memory in the M.2 solid-state drive slot. Replacement of the Intel Optane memory must be done by a Lenovo- authorized repair facility or technician.
• The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:
– Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.
– Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.
– Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.
– Do not apply pressure to the internal storage drive.
– Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, remove these parts in order, if any:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.

Removal steps

Note: Remove the film that covers the thermal pad (if any) when installing the M.2 solid-state drive.

Wi-Fi card

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.
6. Remove the system board shielding. See “System board shielding” on page 52.
Removal steps

Memory module and shielding

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Attention: Do not touch the contact edge of the memory module. Otherwise, the memory module might get damaged.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.
6. Remove the system board shielding. See “System board shielding” on page 52.

Removal steps

Heat sink and gaskets

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.

• Remove the system board shielding. See “System board shielding” on page 52.

Removal steps
Notes:
• Carefully remove the screws from the system board to avoid any possible damage to the system board. The screws cannot be removed from the heat sink.
• You might have to gently twist the heat sink to free it from the microprocessor.
• Do not touch the thermal grease while handling the heat sink.

Note: Thermal module forms an antenna effect and circulates a loop with gaskets. If routing shows negative, radiation will diffuse and the system might go abnormal.

Speaker

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:

1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.
6. Remove the system board shielding. See “System board shielding” on page 52.

Removal steps

Power supply unit

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Although there are no moving parts in the computer after the power cord has been disconnected, the following warnings are required for your safety.
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately. Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.

For access, do the following:
1. Remove the computer stand. See “Computer stand” on page 49.
2. Remove the rear cover. See “Rear cover ” on page 50.
3. Remove the system board shielding. See “System board shielding” on page 52.

Removal steps

Power switch board

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand. See “Computer stand” on page 49.
5. Remove the rear cover. See “Rear cover ” on page 50.
6. Remove the system board shielding. See “System board shielding” on page 52.
7. Remove the power supply unit. See “Power supply unit” on page 60.

Removal steps

System board

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

The heat-sink-and-fan assembly and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:
1. Remove these parts in order, if any:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
2. Record the cable routing and cable connections, and then disconnect all cables from the system board.

See “System board” on page 48.
Notes:
• Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the system board. After you replace the system board, the VPD must be updated.

Fan

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.

Optical drive housing

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
Attention:The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data.

When handling the internal storage drive, observe the following guidelines:
• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.
• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.
• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.
• Do not apply pressure to the internal storage drive.
• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, do the following:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.

2.5-inch hard disk drive

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data.

When handling the internal storage drive, observe the following guidelines:
• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.
• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.
• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.
• Do not apply pressure to the internal storage drive.
• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, do the following:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.

Removal steps

2.5-inch hard disk drive foil

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data.

When handling the internal storage drive, observe the following guidelines:
• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.
• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.
• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.
• Do not apply pressure to the internal storage drive.
• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, do the following:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.

• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.
• Remove the 2.5-inch hard disk drive. See “2.5-inch hard disk drive” on page 65.

Optical drive, bracket and bezel

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the system board shielding. See “System board shielding” on page 52.

• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.

Removal steps

Optical drive board

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.

• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.
• Remove the 2.5-inch hard disk drive. See “2.5-inch hard disk drive” on page 65.
• Remove the optical drive, bracket and bezel. See “Optical drive, bracket and bezel” on page 67.

Rear cover bump

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the USB board. See “USB board” on page 51.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.

• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the speaker. See “Speaker” on page 59.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.

Removal steps

Microphone module

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.

• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the USB board. See “USB board” on page 51.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the speaker. See “Speaker” on page 59.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.
• Remove the rear cover bump. See “Rear cover bump” on page 69.

Removal steps

Camera module

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the USB board. See “USB board” on page 51.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the speaker. See “Speaker” on page 59.
• Remove the system board. See “System board” on page 62.
• Remove the optical drive housing. See “Optical drive housing” on page 64.
• Remove the rear cover bump. See “Rear cover bump” on page 69.
• Remove the microphone module. See “Microphone module” on page 70.

Removal steps

Main frame

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the USB board. See “USB board” on page 51.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the speaker. See “Speaker” on page 59.
• Remove the power supply unit. See “Power supply unit” on page 60.
• Remove the power switch board. See “Power switch board” on page 61.
• Remove the system board. See “System board” on page 62.
• Remove the fan. See “Fan” on page 63.
• Remove the optical drive housing. See “Optical drive housing” on page 64.
• Remove the rear cover bump. See “Rear cover bump” on page 69.

Front bezel

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

For access, remove the following parts in order:
• Remove the computer stand. See “Computer stand” on page 49.
• Remove the rear cover. See “Rear cover ” on page 50.
• Remove the USB board. See “USB board” on page 51.
• Remove the system board shielding. See “System board shielding” on page 52.
• Remove the M.2 solid-state drive and thermal pad. See “M.2 solid-state drive and thermal pad” on page 54.
• Remove the Wi-Fi card. See “Wi-Fi card” on page 55.
• Remove the memory module and thermal pad. See “Memory module and shielding” on page 57.
• Remove the heat sink and gaskets. See “Heat sink and gaskets” on page 58.
• Remove the speaker. See “Speaker” on page 59.
• Remove the power supply unit. See “Power supply unit” on page 60.
• Remove the power switch board. See “Power switch board” on page 61.
• Remove the system board. See “System board” on page 62.
• Remove the fan. See “Fan” on page 63.
• Remove the optical drive housing. See “Optical drive housing” on page 64.
• Remove the rear cover bump. See “Rear cover bump” on page 69.
• Remove the main frame. See “Main frame” on page 74.

Chapter 7.Notices and trademarks

Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user’s responsibility to evaluate and verify the operation of any other product, program, or service.
Lenovo may have patents or pending patent programs covering subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:
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References

• Lenovo Computer Parts | Genuine Replacement Parts | Lenovo Support US
• English Community-Lenovo Community
• Official Lenovo Laptop, Accessories & PC Support - Lenovo Support US
• Lenovo Diagnostic Solutions: Overview - Lenovo Support US
• Lenovo Support | Drivers, Troubleshooting, Warranty, Repair | Lenovo Support US
• Lenovo Computer Parts | Genuine Replacement Parts | Lenovo Support US
• Page Not Found - Lenovo Support US
• Microsoft Support
• Accessibility Features Content | Lenovo US
• Popular Topics: Tips for PC's - Lenovo Support US

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