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Lenovo ThinkBook 13x Gen 4 Hardware Maintenance Manual
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Lenovo ThinkBook 13x Gen 4 Hardware Maintenance Manual

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Hardware Maintenance Manual
Lenovo ThinkBook 13x Gen 4

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Summary of Contents for Lenovo ThinkBook 13x Gen 4

  • Page 1 Hardware Maintenance Manual Lenovo ThinkBook 13x Gen 4...
  • Page 2 First Edition (January 2024) © Copyright Lenovo 2024.

  • Page 3: Table Of Contents

    Appendix A. Label locations..45 Type, quantity, and areas of thermal interface Trademarks ....xlvii materials application on the heat sink ..© Copyright Lenovo 2024...
  • Page 4 Hardware Maintenance Manual...

  • Page 5: About This Manual

    Important: • This manual is intended only for trained service technicians who are familiar with Lenovo products. • Before servicing a Lenovo product, be sure to read all the information under Chapter 1 “Safety information” on page 1. © Copyright Lenovo 2024...
  • Page 6 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Safety Information

    • 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 © Copyright Lenovo 2024...

  • Page 8: Safety Inspection Guide

    This guide addresses only those items. You should use good judgment to identify potential safety hazards due to attachment of non-Lenovo features or options not covered by this inspection guide.

  • Page 9: Handling Devices That Are Sensitive To Electrostatic Discharge

    4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo alterations. 7. 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.

  • Page 10: Grounding Requirements

    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 (multilingual translations) The safety notices in this section are provided in the following languages: •...
  • Page 11 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO DANGER DANGER DANGER Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER DANGER VORSICHT Chapter 1 Safety information...
  • Page 16 VORSICHT VORSICHT VORSICHT VORSICHT VORSICHT Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Hardware Maintenance Manual...

  • Page 25: Chapter 2. General Checkout

    • LCD panel cracked from the application of excessive force or from being dropped • Scratched (cosmetic) parts • Distortion, deformation, or discoloration of the cosmetic parts • Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force © Copyright Lenovo 2024...

  • Page 26: Cru List

    Table 1. Models: ThinkBook 13x G4 IMH (MT: 21KR) Type ac power adapter self-service Power cord * self-service Lenovo Magic Bay Light self-service Lenovo Magic Bay 4K Webcam * self-service Lenovo Magic Bay LTE * self-service * for selected models Hardware Maintenance Manual...

  • Page 27: Chapter 3. Identifying Frus (Crus)

    Chapter 3. Identifying FRUs (CRUs) Locate FRUs and CRUs The exploded illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to replace when servicing a customer’s computer. © Copyright Lenovo 2024...
  • Page 28 Figure 1. ThinkBook 13x G4 IMH exploded view Hardware Maintenance Manual...
  • Page 29 Table 2. FRU (CRU) categories FRU (CRU) category LCD module Note: The LCD module is an assembly FRU, do not disassemble it. Upper case (with keyboard) Fingerprint board cable IO board cable (up) IO board cable (down) System board IO board EDP Camera cable bracket Heat sink Thermal sponge...
  • Page 30 Hardware Maintenance Manual...

  • Page 31: Chapter 4. Removing A Fru Or Cru

    Chapter 4. Removing a FRU or CRU Service tools The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving the product models as described by this publication. Prepare them before you service the product.

  • Page 32: Handling Thermal Interface Materials

    3. Follow the correct sequence in the steps for removing an FRU, as shown in the illustrations by the numbers in square callouts. 4. When removing an FRU, move it in the direction as shown by the arrow in the illustration. 5.

  • Page 33: Areas On The System Board Where Thermal Interface Materials Are Applied

    Figure 2. Areas on the heat sink where thermal interface materials should be applied Areas on the system board where thermal interface materials are applied The following figure shows the areas on the system board where thermal interface materials are applied. Figure 3.
  • Page 34 Figure 4. Remove six screws Screw specifications Number of screws Torque force (kgf.cm) M2.0 x L5.0 1.85 ± 0.15 Step 3. Pry up the latches. Lift the top side of the lower case slightly. Attention: Do not use too much force when lift the lower case, otherwise the battery cable or connector may be damaged.

  • Page 35: Remove The Touchpad Cables

    • Make sure the left and right alignment when assembly the lower case. • Make sure there are no foreign materials in the battery area. Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Lower case (with battery) Remove the touchpad cables Make sure the following FRUs (or CRUs) have been removed.

  • Page 36: Remove The Speakers

    Figure 7. Remove the touchpad cables Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Touchpad cables Remove the speakers Make sure the following FRU (or CRU) has been removed. “Remove the lower case (with battary)” on page 27 Step 1.

  • Page 37: Remove The Audio Board Bracket

    Torque force (kgf.cm) M2.0 x L2.0 1.85 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Speakers Remove the audio board bracket Make sure the following FRU (or CRU) has been removed.

  • Page 38: Remove The Thermal Sponge

    Number of screws Torque force (kgf.cm) M1.6 x L3.0 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Audio board bracket Remove the thermal sponge Make sure the following FRU (or CRU) has been removed.

  • Page 39: Remove The Heat Sink

    Torque force (kgf.cm) M2.0 x L2.0 1.85 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Solid-state drive (SSD) Remove the heat sink Make sure the following FRUs (or CRUs) have been removed.

  • Page 40: Remove The Fan

    Screw specifications Number of screws Torque force (kgf.cm) M1.6 x L1.7 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Heat sink Related topics “Handling thermal interface materials ” on page 26 Remove the fan Make sure the following FRU (or CRU) has been removed.

  • Page 41: Remove The Edp Camera Cable Bracket

    Torque force (kgf.cm) M1.6 x L1.7 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Remove the EDP camera cable bracket Make sure the following FRU (or CRU) has been removed.

  • Page 42: Remove The Camera Cable Bracket

    Number of screws Torque force (kgf.cm) M1.6 x L1.7 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: EDP camera cable bracket Remove the camera cable bracket Make sure the following FRU (or CRU) has been removed.

  • Page 43: Lcd Self Test

    M2.0 x L4.0 3.0 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: LCD module LCD Self Test When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether the LCD functions normally.

  • Page 44: Remove The System Board

    Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in sequence across the entire screen, it indicates that the LCD functions normally. The test lasts for about 20 seconds and then exits automatically. You also can press the power button to exit the test.
  • Page 45 Figure 21. Disconnect cables connected to the system board, IO board, and audio board. Step 2. Remove eight screws and then lift the system board, IO board and audio board with their cables. Chapter 4 Removing a FRU or CRU...

  • Page 46: Use A Golden Key U1 Tool To Flash-Write Key Id Information

    Torque force (kgf.cm) M1.6 x L1.7 1.85 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts: System board Related topics “Handling thermal interface materials ” on page 26 Use a Golden Key U1 tool to flash-write key id information...

  • Page 47: Remove The Io Board And Cables

    The Golden Key U1 tool is prepared by running the U1 Update software on a FAT32-formatted USB thumb drive. Go to https://support.lenovo.com/us/en/solutions/ht102004 for detailed instructions on how to create and use a Golden Key U1 tool. Remove the IO board and cables Make sure the following FRUs (or CRUs) have been removed.

  • Page 48: Remove The Audio Board And Cables

    Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: IO board IO board cable (up) IO board cable (down) Remove the audio board and cables Make sure the following FRUs (or CRUs) have been removed.

  • Page 49: Remove The Fingerprint Board And Cable

    Detach the fingerprint board cable connector and then remove the fingerprint board cable. Figure 28. Remove the fingerprint board cable Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Fingerprint board cable Remove the upper case (with keyboard) Make sure the following FRUs (CRUs) have been removed.
  • Page 50 “Remove the audio board and cables” on page 42 “Remove the fingerprint board and cable” on page 43 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Upper case (with keyboard) Hardware Maintenance Manual...

  • Page 51: Appendix A. Label Locations

    50 mm x 22 mm KCC label Country label and WL/BT 32 mm x 10 mm label 20 mm x 10 mm 52 mm x 10 mm WL/BT label 32 mm x 10 mm 16.5 mm x 15 mm © Copyright Lenovo 2024...
  • Page 52 Hardware Maintenance Manual...

  • Page 53: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2024 Lenovo.

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