Chapter 6. Symptom-to-FRU Index
SDRAM memory errors ..........70
Hard disk drive boot error .........70
Power Supply Errors ...........71
Diagnostic error codes...........72
Beepsymptoms.............90
No-beepsymptoms............92
POST error codes ............93
Miscellaneous error messages ........107
Undetermined problems..........109

The Symptom-to-FRU index lists error symptoms and possible causes. The most

likely cause is listed first. Always begin with ″General Checkout″on page 1. This

index can also be used to help you decide which FRUs to have available when

servicing a computer. If you areunable to correct the problem using this index, go

to “Undetermined problems”on page 109.

Notes:
vIf you have both an error message and an incorrect audio response,diagnose the error
message first.
vIf you cannot run the diagnostic tests or you get a diagnostic error code when running a
test, but did receive a POST error message, diagnose the POST error message first.
vIf you did not receive any error message, look for a description of your error symptoms
in the first part of this index.
vCheck the hard disk drive jumper settings before you replacea hard disk drive.
Important:
Some errors are indicated with a series of beep codes (see “Beep symptoms”on page 90).
Type2254, 2256, 2257, 6336, 6337, 6339, 6341, 6342, 6346, 6347, 6348 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 10).
2. Set Power-On Self-Testto Enhanced.
The processor is a separate FRU from the system board; the processoris not included with
the system board FRU.
© Copyright IBM Corp. 2000 69