Lenovo IdeaPad S540-14IML Owner's manual

Hardware Maintenance Manual
Lenovo IdeaPad S540 series
Lenovo IdeaPad S540-14IML
Lenovo IdeaPad S540-14IML Touch

Hardware Maintenance Manual

First Edition (August 2019)
© Copyright Lenovo 2019.
LIMITED A D RESTRICTED RIGHTS OTICE: 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 o. GS-
35F-05925.

Contents
Chapter 1. Safety infor ation . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
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 . . . . . . . . . . . . . . . 21
Checking the ac power adapter . . . . . . . . 22
CRU list . . . . . . . . . . . . . . . . . . 23
Chapter 3. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 25
All FRUs (CRUs). . . . . . . . . . . . . . . 25
Miscellaneous parts . . . . . . . . . . . . . 31
Chapter 4. Re oving a FRU or
CRU . . . . . . . . . . . . . . . . . . 33
General guidelines. . . . . . . . . . . . . . 33
Remove the lower case . . . . . . . . . . . . 33
Remove the battery pack . . . . . . . . . . . 34
Remove the memory module . . . . . . . . . 36
Remove the M.2 solid-state drive . . . . . . . . 37
Remove the Wi-Fi card . . . . . . . . . . . . 38
Remove the heat sink and fan assembly . . . . . 40
Remove the dc-in cable. . . . . . . . . . . . 42
Remove the speakers . . . . . . . . . . . . 43
Remove the fingerprint board . . . . . . . . . 44
Remove the touchpad assembly . . . . . . . . 46
Remove the I/O board . . . . . . . . . . . . 47
Remove the system board. . . . . . . . . . . 48
Remove the upper case(with keyboard) . . . . . 50
Disassemble the LCD module . . . . . . . . . 52
Remove the LCD panel . . . . . . . . . . 52
Remove the hinges and the LCD cable . . . . 56
Remove the camera and microphone board . . 58
Appendix A. Label locations. . . . . . 61
Trademarks . . . . . . . . . . . . . . . . lxiii
© Copyright Lenovo 2019 i