Lenovo ThinkCentre 6487 Hardware Maintenance Manual page 91

Beep Symptom
1-3-1-3 Keyboard controller failed
2-2-3
CMOS power failure and checksum checks
failed
2-2-4 CMOS configuration info validation
failed
2-3-1 Screen initialization failed
2-3-2 Screen memory failed
2-3-3 Screen retrace failed
1-2 Search for video ROM failed
All other beep code sequences
Continuous beep
Repeating short beeps
FRU/Action
1. System Board
2. Keyboard
1. Battery
2. System Board
1. Battery
2. System Board
1. Jumper on J28
2. System Board
System board
System board
System board
System board
System Board
1. Keyboard stuck key
2. Keyboard Cable
3. System Board
Chapter 7. Symptom-to-FRU Index
85