Table Of Contents - Lenovo ThinkCentre neo 50a 24 Gen 3 Hardware Maintenance Manual

Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Important safety
information . . . . . . . . . . . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 2
Safety inspection guide . . . . . . . . . . . . . 3
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . . . . . 4
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multi-lingual translations) . . . . . . 4
Chapter 2. Important service
information . . . . . . . . . . . . . . . 27
Strategy for replacing FRUs . . . . . . . . . .
Strategy for replacing a hard disk drive or a
solid-state drive . . . . . . . . . . . . .
Important notice for replacing a system
board . . . . . . . . . . . . . . . . .
How to use error codes . . . . . . . . . .
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . .
Product definition . . . . . . . . . . . .
FRU identification . . . . . . . . . . . .
Chapter 3. Product overview . . . . . 29
Overview . . . . . . . . . . . . . . . . .
Rear . . . . . . . . . . . . . . . . . . .
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 31
Service checkout . . . . . . . . . . . . . .
Problem determination tips . . . . . . . .
Symptom-to-FRU index . . . . . . . . . . .
Hard disk drive boot error . . . . . . . . .
Power supply problems . . . . . . . . . .
Beep symptoms . . . . . . . . . . . . .
POST error codes . . . . . . . . . . . .
Miscellaneous error conditions . . . . . . .
Undetermined problems
Chapter 5. Diagnostics . . . . . . . . 39
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Basic procedure for resolving computer
problems . . . . . . . . . . . . . . . . .
UEFI diagnostic program . . . . . . . . . . .
Lenovo diagnostic tools
The Vantage app . . . . . . . . . . . . . .
Self-help resources . . . . . . . . . . . . .
Chapter 6. Hardware removal and
installation . . . . . . . . . . . . . . . 43
Handling static-sensitive devices . . . . . . . .
Service tool kit . . . . . . . . . . . . . . .
Major FRUs and CRUs . . . . . . . . . . . .
System board . . . . . . . . . . . . . . .
Removing and installing hardware
External options . . . . . . . . . . . . .
Computer stand . . . . . . . . . . . . .
Rear cover . . . . . . . . . . . . . . .
USB board . . . . . . . . . . . . . . .
System board shielding . . . . . . . . . .
M.2 solid-state drive and thermal pad . . . .
Wi-Fi card . . . . . . . . . . . . . . .
Memory module and shielding . . . . . . .
Heat sink and gaskets . . . . . . . . . .
Speaker . . . . . . . . . . . . . . . .
Power supply unit . . . . . . . . . . . .
Power switch board . . . . . . . . . . .
System board . . . . . . . . . . . . . .
Fan . . . . . . . . . . . . . . . . . .
Optical drive housing . . . . . . . . . . .
2.5-inch hard disk drive . . . . . . . . . .
2.5-inch hard disk drive foil . . . . . . . .
Optical drive, bracket and bezel. . . . . . .
Optical drive board. . . . . . . . . . . .
Rear cover bump . . . . . . . . . . . .
Microphone module . . . . . . . . . . .
Camera module . . . . . . . . . . . . .
Main frame . . . . . . . . . . . . . . .
Front bezel . . . . . . . . . . . . . . .
Chapter 7. Notices and
trademarks . . . . . . . . . . . . . . . 77
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