IBM 6840GAU - NetVista A40 - 6840, Hardware Maintenance Manual

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Beep Symptom FRU/Action
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
30.
2. System Board
Continuous beep
1. System Board
Repeating short beeps
1. Keyboard stuck key?
2. Keyboard Cable
3. System Board
No-beep symptoms
Important:
Type 2271/6840/6841 computers default to come up quiet (no beep and no memory count
and checkpoint code display) when no errors are detected by POST.
To enable beep and memory count and checkpoint code display when a successful POST
occurs, do the following:
1.
Select
Start Options
in the Configuration/Setup Utility program (see “Setup Utility
program” on page 7).
2. Set Power-On Self-Test to Enhanced .
Symptom/Error FRU/Action
No beep during POST but computer works
correctly.
1. System Board
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Hardware Maintenance Manual A40 Type 6840 A40P Type 6841 A40i Type 2271: IBM NetVista Computer