Lenovo NetVista Hardware Maintenance Manual (HMM) for NetVista 2271, 6840, and - Page 64

No-beep symptoms, Power-On Self-Test

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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. 1. Memory Module Base 640 KB memory error or shadow RAM error 2. System Board One long beep and two or three short beeps 1. Video Adapter (if installed) during POST. (Video error) 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 No beep during POST but computer works correctly. FRU/Action 1. System Board 58 Hardware Maintenance Manual A40 Type 6840 A40P Type 6841 A40i Type 2271: IBM NetVista Computer

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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
58
Hardware Maintenance Manual A40 Type 6840 A40P Type 6841 A40i Type 2271: IBM NetVista Computer