Lenovo Legion Y740 Series Owner's manual

Hardware Maintenance Manual
Lenovo Legion Y740 Series

Hardware Maintenance Manual
Lenovo Legion Y740 Series

First Edition (December 2018)
© Copyright Lenovo 2018.

Contents
Chapter 1. afety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . .
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. General checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 1
Checking the ac power adapter . . . . . . . .
Lenovo Legion Y740 Series CRU list. . . . . . .
Chapter 3. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 25
All FRUs (CRUs) for Lenovo Legion Y740 Series . . 5
Miscellaneous parts . . . . . . . . . . . . . 31
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 33
General guidelines. . . . . . . . . . . . . . 33
Remove the lower case . . . . . . . . . . . . 33
Remove the battery pack . . . . . . . . . . . 34
Remove the M. solid-state drive . . . . . . . . 36
Remove the coin-cell battery. . . . . . . . . . 38
Remove the storage drive (for selected models) . . 39
Remove the memory module . . . . . . . . . 4
Remove the Wi-Fi card . . . . . . . . . . . . 44
Remove the subwoofer (for Lenovo Legion Y740–
17) . . . . . . . . . . . . . . . . . . . . 47
Remove the heat sink and fan assembly . . . . . 48
Remove the speakers . . . . . . . . . . . . 50
Remove the I/O board . . . . . . . . . . . . 51
Remove the system board. . . . . . . . . . . 54
Disassemble the LCD module . . . . . . . . . 56
Remove the LCD module . . . . . . . . . 57
Remove the LCD bezel . . . . . . . . . . 59
Remove the hinges. . . . . . . . . . . . 60
Remove the LCD panel . . . . . . . . . . 61
Remove the camera and microphone board . . 63
Appendix A. Label locations. . . . . . 65
Trademarks . . . . . . . . . . . . . . . . lxvii
© Copyright Lenovo 018 iii