Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 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
CRU list . . . . . . . . . . . . . . . . . . 22
Chapter 3. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 23
Locate FRUs and CRUs . . . . . . . . . . . 23
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 27
Service tools . . . . . . . . . . . . . . . . 27
General guidelines. . . . . . . . . . . . . . 27
Remove the rubber foot. . . . . . . . . . . . 28
Remove the lower case . . . . . . . . . . . . 29
Remove the battery pack . . . . . . . . . . . 30
Remove the solid-state drive (SSD) . . . . . . . 30
Remove the antenna module. . . . . . . . . . 32
Remove the heat sink . . . . . . . . . . . . 32
Remove the fans . . . . . . . . . . . . . . 33
Remove the speakers . . . . . . . . . . . . 34
Remove the touchpad board cable . . . . . . . 35
Remove the system board, I/O board and I/O
board cables . . . . . . . . . . . . . . . . 36
Use a Golden Key U1 tool to flash-write key id
information . . . . . . . . . . . . . . . 39
Remove the LCD module . . . . . . . . . . . 39
Remove the upper case. . . . . . . . . . . . 40
Appendix A. Label locations. . . . . . 43
Trademarks . . . . . . . . . . . . . . . . xlv
© Copyright Lenovo 2022 i
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