Lenovo Legion Y740S-15IRH Hardware Maintenance Manual
  1. Manuals
  2. Brands
  3. Lenovo Manuals
  4. Laptop
  5. Legion Y740S-15IRH
  6. Hardware maintenance manual
Lenovo Legion Y740S-15IRH Hardware Maintenance Manual

Lenovo Legion Y740S-15IRH Hardware Maintenance Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Lenovo Legion Y740S-15IRH
Lenovo Legion Y740S-15IMH
Hardware Maintenance Manual

Advertisement

Table of Contents
loading

Related Manuals for Lenovo Legion Y740S-15IRH

Summary of Contents for Lenovo Legion Y740S-15IRH

  • Page 1 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 2 First Edition (April 2020) © Copyright Lenovo 2020.

  • Page 3: Table Of Contents

    Remove the coin-cell battery..Trademarks ....lxi Remove the battery pack ... © Copyright Lenovo 2020...
  • Page 4 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH 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 2020...
  • Page 6 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH 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 © Copyright Lenovo 2020...

  • 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 Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH 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 2020...

  • Page 28: Cru List

    • Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard disk drive might have been dropped or subject to excessive force. CRU list Table 1. Model: Lenovo Legion Y740S-15IRH & Lenovo Legion Y740S-15IMH (Machine type: 81QA & 81YX) Type ac power adapter...

  • Page 29: Chapter 3. Idetifying Fru (Cru)

    Chapter 3. Idetifying FRU (CRU) Locate FRU and CRU The exploded illustrations help Lenovo service technicians identify FRU or CRU that they may need to replace when servicing a customer’s computer. © Copyright Lenovo 2020...
  • Page 30 Figure 1. System exploded view Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 31 Table 2. System FRU (CRU) categories FRU (CRU) category Strip cover LCD cap Upper case assembly (with keyboard and touch pad) Power LED board Fingerprint reader Coin-cell battery I/O board M.2 solid-state drive (SSD) Heat sink Fans Battery pack Speakers Lower case WLAN sponge WLAN card...
  • Page 32 Figure 2. LCD exploded view Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...
  • Page 33 Table 3. LCD FRU (CRU) categories FRU (CRU) category LCD bezel mylar LCD panel Removable tapes LCD cover Bezel cap Microphone board Microphone board Hinge cap LCD hinge Chapter 3 Idetifying FRU (CRU)
  • Page 34 Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...

  • Page 35: 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 36: Remove The Lower Case

    Disconnect all power cords, cables, and USB devices from the computer. Step 2. Place the computer upside down on a flat surface. Step 3. Remove ten screws. Figure 3. Remove ten screws Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...

  • Page 37: Remove The Coin-Cell Battery

    Remove the lower case using the pry tool. Figure 4. Remove lower case. Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Lower case Remove the coin-cell battery Make sure the following FRU (or CRU) have been removed.

  • Page 38: Remove The Battery Pack

    Figure 5. Remove coin-cell battery Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Coin-cell battery Remove the battery pack Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the coin-cell battery”...

  • Page 39: Remove The Touch Pad Bracket

    Callout number Screw specifications Number of screws M2 x L3 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Battery pack Remove the touch pad bracket Make sure the following FRU (or CRU) have been removed.

  • Page 40: Remove The Wlan Card

    Callout number Screw specifications Number of screws M2 x L3 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Touch pad bracket Remove the WLAN card Make sure the following FRU (or CRU) have been removed.
  • Page 41 Figure 9. Slide WLAN card out of the slot Number of screws Callout number Screw specifications M2 x L3 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: WLAN card Chapter 4 Removing a FRU or CRU...

  • Page 42: Remove The Speakers

    Attention: Use your fingernail to pull the connector to unplug the battery pack cable. Do not pull the cable. Figure 10. Remove right speaker Step 2. Disconnect the left speaker cable from the system board. Then, remove the left speaker. Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...

  • Page 43: Remove The M.2 Solid-State Drive

    Figure 11. Remove left speaker Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Speakers Remove the M.2 solid-state drive Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 Step 1.

  • Page 44: Remove The Heat Sink

    X-RiteColorAssistant.exe will auto run. Click Restore Profile button from prompted window to restore the profile from Lenovo cloud. Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: M.2 solid-state drive Remove the heat sink Make sure the following FRU (or CRU) have been removed.

  • Page 45: Remove The Fans

    Callout number Screw specifications Number of screws M1.6 x L1.8 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Heat sink Remove the fans Make sure the following FRU (or CRU) have been removed.
  • Page 46 Number of screws M2 x L3 Step 2. Remove the fans. Figure 15. Remove fans Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Fans Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...

  • Page 47: Remove The Usb-C Bracket

    Remove the USB-C bracket Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 Step 1. Disconnect the battery pack cable from the system board. Then, remove four screws. Attention: Use your fingernail to pull the connector to unplug the battery pack cable. Do not pull the cable.

  • Page 48: Remove The I/O Board

    Figure 17. Remove USB-C bracket Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: USB-C bracket Remove the I/O board Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 Step 1.

  • Page 49: Remove The System Board

    Screw specifications Number of screws M2 x L3 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: I/O board Remove the system board Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the battery pack”...
  • Page 50 Figure 19. Disconnect cables Step 2. Disconnect fingerprint and LED FFC cables connected to the system board. Figure 20. Disconnect cables Step 3. Remove three screws. Then, remove the system board. Lenovo Legion Y740S-15IRH Lenovo Legion Y740S-15IMH Hardware Maintenance Manual...

  • Page 51: Remove The Upper Case Graphite

    Callout number Screw specifications Number of screws M2 x L3 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: System board Remove the upper case graphite Make sure the following FRU (CRU) have been removed.

  • Page 52: Remove The Fingerprint Reader

    Lenovo Legion Y740S-15IMH Figure 23. Remove upper case graphite Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Upper case graphite Remove the fingerprint reader Make sure the following FRU (or CRU) have been removed.
  • Page 53 “Remove the fans” on page 39 “Remove the system board” on page 43 Step 1. Remove two screws. Then, remove the fingerprint reader. Lenovo Legion Y740S-15IRH Figure 24. Remove two screws and remove fingerprint reader Callout number Screw specifications Number of screws M1.6 x L2.5...

  • Page 54: Remove The Power Led Board

    Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Fingerprint reader Remove the power LED board Make sure the following FRU (or CRU) have been removed. Step 1. For model 15IRH, remove one screw, then remove the power button board. For model 15IMH, remove the power button board.

  • Page 55: Remove The Strip Cover

    Figure 27. Remove power LED board Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Power button board Remove the strip cover Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the battery pack”...

  • Page 56: Remove The Lcd Cap

    M2 x L3 Step 2. Remove the strip cover. Figure 29. Remove the strip cover Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Strip cover Remove the LCD cap Make sure the following FRU (or CRU) have been removed.

  • Page 57: Remove The Lcd Module

    Screw specifications Number of screws M2 x L2 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: LCD cap Remove the LCD module Make sure the following FRU (CRU) have been removed. “Remove the lower case” on page 30 “Remove the battery pack”...

  • Page 58: Remove The Lcd Bezel

    Step 2. Open the LCD module away from the upper case and remove the LCD module. Figure 32. Remove the LCD module Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD module Remove the LCD bezel Make sure the following FRU (CRU) have been removed.

  • Page 59: Remove The Bezel Cap

    Step 1. Remove the LCD bezel. Attention: The LCD bezel tape is not reusable. Figure 33. Remove the LCD bezel Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD bezel Remove the bezel cap Make sure the following FRU (CRU) have been removed.

  • Page 60: Remove The Lcd Hinge

    Screw specifications Number of screws M2 x L2 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Bezel cap Remove the LCD hinge Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the LCD bezel”...

  • Page 61: Remove The Lcd Hinge Cap

    Callout number Screw specifications Number of screws M2.5 x L2.5 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD hinge Remove the LCD hinge cap Make sure the following FRU (or CRU) have been removed.

  • Page 62: Remove The Camera

    Figure 36. Pull out the LCD hinge cap Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD hinge cap Remove the camera Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the LCD bezel”...

  • Page 63: Remove The Microphone Fpc

    Figure 37. Remove camera Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Camera Remove the microphone FPC Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the LCD bezel”...

  • Page 64: Remove The Lcd Panel

    Figure 38. Remove microphone FPC Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Microphone FPC Remove the LCD panel Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 30 “Remove the LCD bezel”...
  • Page 65 Figure 39. Remove adhesive tapes Step 2. Rotate the LCD panel away from the LCD cover. Figure 40. Rotate LCD panel. Step 3. Disconnect the LVDS cable. Then, remove the LCD panel. Chapter 4 Removing a FRU or CRU...
  • Page 66 LCD part. When the new color profiles are installed successfully, a prompted window will be displayed. Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part:...

  • Page 67: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2020 Lenovo.

This manual is also suitable for:

Legion y740s-15imh

Table of Contents