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Lenovo IdeaPad S940 Hardware Maintenance Manual
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Lenovo IdeaPad S940 Hardware Maintenance Manual

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Lenovo IdeaPad S940 and Lenovo Yoga S940
Hardware Maintenance Manual

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Summary of Contents for Lenovo IdeaPad S940

  • Page 1 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 2 First Edition (September 2019) © Copyright Lenovo 2019.

  • Page 3: Table Of Contents

    Remove the upper case (with keyboard) ..Locate FRUs and CRUs ... Trademarks ....xliii © Copyright Lenovo 2019...
  • Page 4 Lenovo IdeaPad S940 and Lenovo Yoga S940 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 2019...
  • Page 6 Lenovo IdeaPad S940 and Lenovo Yoga S940 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 2019...

  • 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 IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 Lenovo IdeaPad S940 and Lenovo Yoga S940 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 2019...

  • Page 28: Cru List

    Table 1. Model: Lenovo IdeaPad S940-14IIL (Machine type: 81R1) Type ac power adapter self-service power cord self-service Table 2. Model: Lenovo Yoga S940-14IIL (Machine type: 81Q8) Type ac power adapter self-service power cord self-service Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 29: Chapter 3. Idetifying Frus (Crus)

    Chapter 3. Idetifying 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 2019...
  • Page 30 Figure 1. Lenovo IdeaPad S940-14IIL/Lenovo Yoga S940-14IIL exploded view Table 3. FRU (CRU) categories FRU (CRU) category LCD module Upper case (with keyboard) Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 31 Table 3. FRU (CRU) categories (continued) Heat sink with fans System board Left I/O board bracket Solid-state drive (SSD) Solid-state drive board with cable Lower case Speakers Battery pack Right I/O board bracket I/O board with cable Touch pad with cable Power cord AC power adapter Screw kit...
  • Page 32 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 33: 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 34: Remove The Lower Case

    Make sure the computer has been shut down before servicing the computer. Step 1. Place the computer upside down on a flat surface. Step 2. Remove four screws. Figure 2. Remove four screws Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 35: Remove The Battery Pack

    Pry up the latches and then remove the lower case. Figure 3. Pry up the latches and remove the lower case 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.

  • Page 36: Remove The Solid-State Drive

    Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable. Step 2. Remove one screw and remove the solid-state drive by pulling it away from the slot. Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 37: Remove The Solid-State Drive Board With Cable

    Figure 5. Remove the solid-state drive Screw specifications Number of screws M2 x L2 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Solid-state drive Remove the solid-state drive board with cable Make sure the following FRUs (or CRUs) have been removed.

  • Page 38: Remove The Touch Pad With Cable

    Remove the touch pad with cable Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 28 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 39 Pivot the upper case (with keyboard) and remove the touch pad with cable as shown. Figure 9. Remove the touch pad with cable Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Chapter 4...

  • Page 40: Remove The Speakers

    Then, disconnect the right speaker cable from the I/O board. Figure 10. Disconnect cables Step 2. Carefully remove the speakers. Figure 11. Remove speakers Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 41: Remove The Heat Sink (With Fans)

    Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Speakers Remove the heat sink (with fans) Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 28 Step 1.

  • Page 42: Remove The I/O Board Brackets

    Remove four screws and remove the left I/O board bracket. Figure 14. Remove the left I/O board bracket Screw specifications Number of screws M2 x L3 Step 2. Remove three screws and remove the right I/O board bracket. Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 43: Remove The I/O Board With Cable

    Figure 15. Remove the right I/O board bracket Screw specifications Number of screws M2 x L3 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Left I/O board bracket Right I/O board bracket Remove the I/O board with cable Make sure the following FRUs (or CRUs) have been removed.

  • Page 44: Remove The System Board

    Lenovo part numbers of the following replacement part: I/O board with cable Remove the system board Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 28 Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 45 “Remove the heat sink (with fans)” on page 35 Step 1. Disconnect cables connected to the system board and disconnect the antenna cables from the wireless module. Figure 18. Disconnect cables Step 2. Remove six screws and disconnect the cable of the I/O board from the system board. Figure 19.

  • Page 46: Remove The Lcd Module

    Step 1. Disconnect the battery pack cable and LCD cable from the system board. Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable. Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...
  • Page 47 Figure 21. Disconnect the battery pack cable and LCD cable from the system board Step 2. Rotate the LCD module to an angle of more than 90 degrees and place the computer on a flat surface as shown. Then, remove six screws. Figure 22.

  • Page 48: Remove The Upper Case (With Keyboard)

    “Remove the system board” on page 38 “Remove the LCD module” on page 40 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Upper case (with keyboard) Lenovo IdeaPad S940 and Lenovo Yoga S940 Hardware Maintenance Manual...

  • Page 49: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2019 Lenovo.

This manual is also suitable for:

Yoga s940

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