Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual
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Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual

Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual

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Lenovo ThinkBook Plus Gen 4
Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkBook Plus Gen 4

  • Page 1 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 2 First Edition (May 2023) © Copyright Lenovo 2023.

  • Page 3: Table Of Contents

    Trademarks ....xlv Service tools ....© Copyright Lenovo 2023...
  • Page 4 Lenovo ThinkBook Plus Gen 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 2023...
  • Page 6 Lenovo ThinkBook Plus Gen 4 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 2023...

  • 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

    The safety notices in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese DANGER DANGER DANGER Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 27: Chapter 2. General Checkout

    • 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 • Damage caused by liquid spilled into the system © Copyright Lenovo 2023...

  • Page 28: Cru List

    CRU list Table 1. CRU list Type ac power adapter self-service Lenovo Digital Pen 3 self-service ThinkBook Plus USB-C Micro Hub self-service Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 29: 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. Figure 1. Exploded view © Copyright Lenovo 2023...
  • Page 30 Solid-state drive (SSD) thermal pad Speakers Lower case Battery pack Battery pack mylar Fans Wi-Fi mylar Upper case (with keyboard) Audio board cable Touchpad cable Lenovo Digital Pen 3 ac power adapter Screw kits Label kits Lenovo ThinkBook Plus Gen 4 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: Remove The Lower Case

    Place the computer upside down on a flat surface. Step 2. Remove eight screws. Then, pry up the latches and remove the lower case. Figure 2. Remove eight screws, pry up the latches and remove the lower case Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 33: Remove The Battery Pack

    Screw specifications Number of screws M2 × L2.6 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Lower case Remove the battery pack Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 26 Step 1.

  • Page 34: Remove The Solid-State Drive

    Figure 4. Remove the battery pack mylar Note: The battery pack mylar is reusable. Please attach this mylar to the new battery pack before replacing it. Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Battery pack...
  • Page 35 Figure 5. Disconnect the battery pack cable and remove the solid-state drive thermal pad Step 2. Remove one screw and remove the solid-state drive by pulling it away from the slot. Figure 6. Remove one screw and the solid-state drive Screw specifications Number of screws M2 ×...

  • Page 36: Remove The Speakers

    Figure 7. Remove the solid-state drive copper foil Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Solid-state drive Solid-state drive thermal pad Solid-state drive copper foil Remove the speakers Make sure the following FRUs (CRUs) have been removed.

  • Page 37: Remove The Heat Sink

    Screw specifications Number of screws M2 × L2 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Speakers Remove the heat sink Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 26 Step 1.

  • Page 38: Remove The Fans

    Figure 9. Disconnect the battery pack cable, loosen four screws in alphabetical order and remove the heat sink Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Heat sink Remove the fans Make sure the following FRUs (or CRUs) have been removed.

  • Page 39: Remove The Edp Cable Brackets

    Screw specifications Number of screws M2 × L2.8 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Fans Remove the EDP cable brackets Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 26 Step 1.

  • Page 40: Remove The Fingerprint Cable

    Figure 12. Disconnect the cables, remove two screws and the audio board cable Screw specifications Number of screws M2 × L4 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Audio board cable Remove the fingerprint cable Make sure the following FRUs (or CRUs) have been removed.

  • Page 41: Remove The Touchpad Cable

    Figure 13. Disconnect the cables and remove the fingerprint cable Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Fingerprint cable Remove the touchpad cable Make sure the following FRUs (or CRUs) have been removed.

  • Page 42: Remove The System Board

    Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Touchpad cable Remove the system board Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 26 “Remove the battery pack” on page 27 “Remove the solid-state drive”...

  • Page 43: Use A Golden Key U1 Tool To Flash-Write Key Id Information

    Figure 16. Remove ten screws and the system board Screw specifications Number of screws M1.6 × L2.9 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: System board Wi-Fi mylar Use a Golden Key U1 tool to flash-write key id information...

  • Page 44: Remove The Fingerprint Module

    Step 1. Remove the fingerprint frame vertically upwards. Figure 17. Remove the fingerprint frame Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Fingerprint frame Remove the fingerprint module Make sure the following FRUs (or CRUs) have been removed.

  • Page 45: Remove The Lcd Module

    Figure 18. Remove the fingerprint module Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Fingerprint module Remove the LCD module Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 26 “Remove the battery pack”...
  • Page 46 • For LCD panel with the factory color calibration feature, do the following to install new color profiles: 1. Connect your computer to the network. 2. Go to to download the ColorTool. https://pcsupport.lenovo.com/downloads/x_rite_color_tool ZIP file. Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 47: Remove The Upper Case (With Keyboard)

    E-ink panel, which also included in Golden Key U1 tool, and E-ink panel test can be applied by Lenovo Diagnostics Windows Versions (Linux and UEFI version have no such function). • 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 48 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 49: Appendix A. Label Locations

    20 mm x 10 mm WL/BT label 52 mm x 10 mm 32 mm x 10 mm 16.5 mm x 15 mm OS label 16 mm x 22.5 mm QR label 17 mm x 26 mm © Copyright Lenovo 2023...
  • Page 50 Lenovo ThinkBook Plus Gen 4 Hardware Maintenance Manual...

  • Page 51: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2023 Lenovo.

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