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Lenovo 14e Chromebook Hardware Maintenance Manual
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Lenovo 14e Chromebook Hardware Maintenance Manual

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Hardware Maintenance Manual
Lenovo 14e Chromebook

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Summary of Contents for Lenovo 14e Chromebook

  • Page 1 Hardware Maintenance Manual Lenovo 14e Chromebook...
  • Page 2 First Edition (Feburary 2019) © Copyright Lenovo 2019. 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-...

  • Page 3: Table Of Contents

    Trademarks ....lxi Locating FRUs and CRUs ... Major FRUs and CRUs ..© Copyright Lenovo 2019...
  • Page 4 Hardware Maintenance Manual...

  • Page 5: About This Documentation

    • Depending on the version of operating systems, some user interface instructions might not be applicable to your computer. • Documentation content is subject to change without notice. Lenovo makes constant improvements on the documentation of your computer, including this Hardware Maintenance Manual. To get the latest documentation, go to https://support.lenovo.com...
  • 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 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

    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 DANGER Chapter 1 Safety information...
  • Page 12 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT 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 1 Safety information...
  • Page 26 Hardware Maintenance Manual...

  • Page 27: 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 2019...

  • Page 28: Checking The Ac Power Adapter

    • Damage caused by liquid spilled into the system • Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an incompatible card • Improper disc insertion or use of an external optical drive •...

  • Page 29: Cru List

    CRU list Model: Lenovo 14e Chromebook MT: 81MH Type ac power adapter self-service power cord self-service Chapter 2 General checkout...
  • Page 30 Hardware Maintenance Manual...

  • Page 31: Chapter 3. Create And Use A Usb Repair Shim

    Step 2. Download the image file of the repair shim from http://www.lenovo.com/support . A Lenovo service credential is needed to download the image file. Attention: Make sure to download the latest version of the image file. A shim created with an earlier version of the image file may cause the repair process to fail.

  • Page 32: Factory Test Items

    Table 1. Combination of the 20 – character VPD Preceding characters Machine type Model number “1S”, 2 digits 7 digits 3 digits 8 digits The MTM and SN can be found on the label attaching to the bottom cover. Step 6. Follow the instructions on the screen to start the FATP Tests.
  • Page 33 Common issues leading to GoogleRequiredTests fail Issue Description HWID mismatch Each Chromebook has a known hardware configuration. Each configuration is assigned an HWID. HWID mismatch can be caused by using unauthorized parts, or missing parts. If the write-protect function is not turned off before recovering the computer with the repair shim, it will also cause HWID mismatch.
  • Page 34 Hardware Maintenance Manual...

  • Page 35: Chapter 4. Identifying Frus (Crus)

    Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at .

  • Page 36: Major Frus And Crus

    Major FRUs and CRUs Figure 1. Lenovo 14e Chromebook exploded view Hardware Maintenance Manual...
  • Page 37 Note: Depending on the computer model, your computer might look different from the illustration above. Table 3. Major FRUs and CRUs FRU description Optional-service CRU Self-service CRU LCD module Upper case (with keyboard) Antennas (main + auxiliary) Touchpad assembly System board Speakers Wi-Fi card I/O board and I/O board cables...

  • Page 38: Lcd Frus And Crus

    LCD FRUs and CRUs Figure 2. LCD module – exploded view Hardware Maintenance Manual...

  • Page 39: Miscellaneous Parts

    • Screw M2.5 x 5.0, silver (4) Two acetate fabric tapes (for speakers) Conductive tape (for touchpad) Looking up the FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: https://support.lenovo.com/partslookup Chapter 4 Identifying FRUs (CRUs)
  • Page 40 Hardware Maintenance Manual...

  • Page 41: Chapter 5. Removing A Fru Or Cru

    6. When replacing a FRU, carefully retain and reuse all screws. If screws are missing, look up details in “Miscellaneous parts” on page 33 for replacement screws and order them through the Lenovo CRM system. 7. When replacing the base cover, reapply all labels that come with the replacement base cover. If some original labels are not included with the replacement base cover, peal them off from the original base cover and paste them on the replacement base cover.

  • Page 42: Remove The Lower Case

    When prompted to log on to the local host, type chronos and press enter. Step 5. Type sudo bash and press enter. Step 6. Type ectool batterycutoff and press enter. Step 7. When the message SUCCESS. The battery has arranged a cut-off and the system should be Step 8.

  • Page 43: Remove The Battery Pack

    Step 3. Remove the lower case. Figure 5. Remove the lower case Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement part: Lower case Remove the battery pack Make sure the following FRU (or CRU) has been removed. “Remove the lower case”...

  • Page 44: Remove The Wi-Fi Card

    Step 2. Detach the battery pack connector from the system board. Figure 7. Detach the battery pack connector Attention: Use your fingernails to unplug the battery pack connector. Do not pull the cable with force. Step 3. Remove the battery pack. Figure 8.
  • Page 45 Step 1. Detach the main and auxiliary antenna connectors. Figure 9. Detach the 2 connectors Step 2. Remove 1 screw. Figure 10. Remove 1 screw Screw specifications Number of screws Color M2.0 x 2.5 Black Chapter 5 Removing a FRU or CRU...

  • Page 46: Remove The I/O Board

    Step 3. Remove the Wi-Fi card by pulling it away from the slot. Figure 11. Remove the Wi-Fi card Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement part: Wi-Fi card Remove the I/O board Make sure the following FRUs (or CRUs) have been removed.
  • Page 47 Step 2. Remove the screws. Figure 13. Remove the screws Position Number of screws Screw specifications Color M2.5 x 5.0 Hinge (right) Silver M2.0 x 5.0 I/O bracket (right) Silver M2.0 x 3.0 I/O board Black Step 3. Remove the right I/O bracket. Figure 14.

  • Page 48: Remove The Speakers

    Step 4. Open the right hinge. Figure 15. Open the right hinge Step 5. Remove the I/O board. Figure 16. Remove the I/O board Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement parts: I/O bracket (right) I/O board Remove the speakers...
  • Page 49 Step 1. Detach the speaker connector from the system board. Figure 17. Detach the speaker connector Step 2. Peel off two acetate fabric tapes. Figure 18. Peel off the acetate fabric tapes Step 3. Fold the keyboard cable upwards to release the speaker cables. Figure 19.

  • Page 50: Remove The System Board

    Step 4. Remove the speakers. Figure 20. Remove the speakers Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement part: speakers Remove the system board Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case”...
  • Page 51 Figure 21. Detach the 6 connectors Step 2. Remove the screws. Figure 22. Remove the screws Screw specifications Position Number of screws Color M2.5 x 5.0 Hinge (left) Silver M2.0 x 5.0 I/O bracket (left) Silver M2.0 x 3.0 Black System board Chapter 5 Removing a FRU or CRU...
  • Page 52 Step 3. Remove the left I/O bracket. Figure 23. Remove the left I/O bracket Step 4. Open the left hinge. Figure 24. Open the left hinge Step 5. Carefully remove the system board. Figure 25. Remove the system board Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement part: System board Hardware Maintenance Manual...

  • Page 53: Remove The Upper Case (With Keyboard)

    I/O bracket (left) Remove the upper case (with keyboard) Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 36 “Remove the battery pack” on page 37 Step 1. Detach the EDP cable connector from the system board. Figure 26.

  • Page 54: Remove The Touchpad Assembly

    Figure 28. Open the hinges Step 4. Remove the upper case in the arrow direction shown below. Figure 29. Remove the upper case Attention: Do not pull out the upper case before detaching the EDP cable connector. Otherwise the cable may be damaged. Refer to “Major FRUs and CRUs”...
  • Page 55 Figure 30. Detach the touchpad connector Step 2. Fold the keyboard cable upwards. Figure 31. Fold the keyboard cable upwards Step 3. Peel off the conductive tape. Figure 32. Peel off the conductive tape Step 4. Remove the 5 screws. Chapter 5 Removing a FRU or CRU...
  • Page 56 Figure 33. Remove the 5 screws Screw specifications Position Number of screws Color M2.0 x 2.0 Touchpad Silver M2.0 x 2.0 Touchpad bracket Silver Step 5. Remove the touchpad bracket. Figure 34. Remove the touchpad bracket Step 6. Remove the touchpad. Figure 35.

  • Page 57: Disassemble The Lcd Module

    Refer to “Major FRUs and CRUs” on page 30 to look up details about the following replacement part: touchpad assembly conductive tape Disassemble the LCD module The LCD module as a whole is not a FRU. Instead, it contains FRUs as its components. Before disassembling the LCD module, make sure it has been detached from the upper case.
  • Page 58 Step 2. Remove two hinge covers on the left and right. Figure 37. Remove the hinge covers Step 3. Remove the 6 screws. Figure 38. Remove the 6 screws Screw specifications Number of screws Color M2.5 x 2.2 Black Hardware Maintenance Manual...
  • Page 59 Step 4. Remove the left and right hinges. Figure 39. Remove the hinges Step 5. Pull out two removable tapes on the left and right. Figure 40. Pull out two removable tapes Step 6. Carefully lift the LCD panel, detach the EDP cable connector from the panel, and then remove the LCD panel.

  • Page 60: Remove The Camera Board

    Figure 41. Detach the EDP cable connector and remove the LCD panel Refer to “LCD FRUs and CRUs” on page 32 to look up details about the following replacement parts: LCD bezel Hinge cover Hinges Removable tapes LCD panel Remove the camera board Make sure the following FRUs (or CRUs) have been removed.
  • Page 61 Figure 42. Detach the camera connector Step 2. Release the EDP cable. Then, remove the EDP cable and camera board. Figure 43. Remove the EDP cable and camera board CAUTION: The camera board is fragile and easily bent. Remove it with great care. Refer to “LCD FRUs and CRUs”...
  • Page 62 Hardware Maintenance Manual...

  • Page 63: Appendix A. Features And Connectors

    Appendix A. Features and connectors 1 2 3 Figure 44. 14e Chromebook features and connectors Table 6. Features and connectors Feature or connector Camera light Camera Microphones dc-in / USB-C connector dc-in light USB 3.0 (Type-A) connector Combo audio connector...
  • Page 64 Hardware Maintenance Manual...

  • Page 65: Appendix B. Label Locations

    50 mm x 19 mm Mexico label Mexico 66 mm x 26.5 mm Indonesia postel label Indonesia 15 mm x 10 mm Malaysia SLP Malaysia 10 mm x 10 mm BIS logo label India 18 mm x 18 mm © Copyright Lenovo 2019...
  • Page 66 Hardware Maintenance Manual...

  • Page 67: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. USB is a trademark of USB Implementers Forum. Wi-Fi is registered trademark of Wi-Fi Alliance. USB-C is a trademark of USB Implementers Forum. All other trademarks are the property of their respective owners. © 2019 Lenovo.

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