IBM 6648 User Manual
Page 85
Beep Symptom
FRU/Action
2-4-X
1.
Run Setup
2.
Memory Module
3.
System Board
3-1-X
DMA register failed
1.
System Board
3-2-4
Keyboard controller failed
1.
System Board
2.
Keyboard
3-3-4
Screen initialization failed
1.
Video Adapter (if installed)
2.
System Board
Display
3-4-1
Screen retrace test detected an error
1.
Video Adapter (if installed)
2.
System Board
3.
Display
3-4-2
POST is searching for video ROM
1.
Video Adapter (if installed)
2.
System Board
4
1.
Video Adapter (if installed)
2.
System Board
All other beep code sequences
1.
System Board
One long and one short beep during POST.Base
640 KB memory error or shadow RAM error
1.
Memory Module
2.
System Board
One long beep and two or three short beeps
during POST.(Video error)
1.
Video Adapter (if installed)
2.
System Board
Three short beeps during POST
1.
See “System board memory” on page 55
2.
System Board
Continuous beep
1.
System Board
Repeating short beeps
1.
Keyboard stuck key?
2.
Keyboard Cable
3.
System Board
Chapter 2. Types 6568/6569/6648/6649
71