IBM 6648 - Manual (Page 86)

No-beep symptoms
Note
Type 6568/6569/6648/6649 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 41).
2. Set Power-On Self Test to Enhanced.
Symptom/Error FRU/Action
No beep during POST but computer works
correctly.
1. System Board
No beep during POST.
1. See “Undetermined problems” on page 90
2. System Board
3. Memory Module
4. Any Adapter or Device
5. Riser Card
6. Power Cord
7. Power Supply
POST error codes
In the following index, X can represent any number.
POST Error Code FRU/Action
000 SCSI Adapter not enabled
1. Verify adapter device and Bus Master fields
are enabled in PCI configuration program.
See documentation shipped with computer.
02X
1. SCSI Adapter
08X Check SCSI terminator installation.
1. SCSI Cable
2. SCSI Terminator
3. SCSI Device
4. SCSI Adapter
101 System board interrupt failure
1. System Board
102 System board timer error
1. System Board
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Hardware Maintenance Manual: IBM NetVista Computer Types 6058, 6059, 6269, 6568, 6569, 6578, 6579, 6648,
6649