IBM XSERIES 255 TYPE 8685, Hardware Maintenance Manual And Troubleshooting Manual

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Chapter 6. Symptom-to-FRU index
This index supports xSeries 255 servers.
Notes:
1. Check the configuration before you replace a FRU. Configuration problems can
cause false errors and symptoms.
2. For IBM devices not supported by this index, refer to the manual for that device.
3. Always start with “General checkout” on page 25.
The symptom-to-FRU index lists symptoms, errors, and the possible causes. The
most likely cause is listed first. Use this symptom-to-FRU index to help you decide
which FRUs to have available when servicing the computer.
The left-hand column of the tables in this index lists error codes or messages, and
the right-hand column lists one or more suggested actions or FRUs to replace.
Note: In tables with more than two columns, multiple columns are required to
describe the error symptoms.
Take the action (or replace the FRU) suggested first in the list of the right-hand
column, then try the server again to see if the problem has been corrected before
taking further action.
Note: Try reseating a suspected component or reconnecting a cable before
replacing the component.
The POST BIOS code displays POST error codes and messages on the screen.
Beep symptoms
Beep symptoms are short tones or a series of short tones separated by pauses
(intervals without sound). See the examples in the following table.
Beeps Description
1-2-3
v One beep
v A pause (or break)
v Two beeps
v A pause (or break)
v Three beeps
4 Four continuous beeps
One beep after successfully completing POST indicates the system is functioning
properly.
Note: See “System” on page 160 to determine which components should be replaced by a field service technician.
Beep/symptom FRU/action
1-1-2
(Microprocessor register test failed)
1. Optional microprocessor (if installed)
2. Microprocessor
3. System board
© Copyright IBM Corp. 2002
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