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Beep Symptom FRU/Action
1-4-4
Software NMI port failure
(only used by EISA BIOS).
1. System Board
2-1-1, 2-1-2, 2-1-3
2-1-4, 2-2-1, 2-2-2
2-2-3, 2-2-4, 2-3-1
2-3-2, 2-3-4, 2-4-1
2-4-2, 2-4-3, 2-4-4
First 64K RAM chip or data
line failure on bit
x
.
1. RAM Memory Board
2. System Board
3-1-2
Master DMA register test in
progress or failure.
1. System Board
3-1-3
Master interrupt mask
register test in progress or
failure.
1. System Board
3-1-4
Slave interrupt mask
register test in progress or
failure.
1. System Board
3-2-4
Keyboard controller test in
progress or failure.
1. System Board
2. Keyboard
3. Keyboard Card
3-3-1
Slave DMA register test in
progress or failure.
1. System Board
3-3-4
Screen memory test in
progress or failure.
1. System Board
3-4-1
Screen initialization in
progress.
1. System Board
3-4-2
Screen retrace test in
progress.
1. System Board
4-2-1
Timer-tick interrupt test in
progress or failure.
1. System Board
4-2-2
Shutdown test in progress
or failure.
1. System Board
2. Processor Card
4-2-3
Gate A20 failure.
1. System Board
4-2-4
Unexpected interrupt in
protected mode.
1. System Board
2. Processor Card
4-3-1
RAM test of memory above
64K in progress or failure.
1. RAM Memory Board
2. SO DIMM
3. System Board
42 IBM Mobile Systems - ThinkPad HMM Volume 3