Chapter 6. Symptom-To-Fru Index; Light Path Led Errors - IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual

Chapter 6. Symptom-to-FRU index

This index supports xSeries 455 servers.
Notes:
1. Check the configuration before you replace a FRU. Configuration problems can
2. For IBM devices not supported by this index, refer to the manual for that device.
3. Always start with "General checkout" on page 37.
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 server.
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: Some tables have more than two columns; in those instances, more than
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

Light Path LED errors

The system-error LED on the operator information panel is lit when certain system
errors occur. If the system-error LED on your server is lit, use the following table to
help determine the cause of the error and the action you should take.
Before replacing any FRU:
1. Observe LEDs on boards.
2. View the system-error log.
3. Run AMIDiag program.
Level 2 Light Path LED
None (An error has occurred and
cannot be isolated, or the ASM
processor has failed.)
All LEDs off (error log full)
Note: "See Log" LED might be lit.
CPU LED on (failed processor)
Note: Verify correct installation
sequence; see "Installing and
replacing a microprocessor and
power module" on page 99.
© Copyright IBM Corp. 2003
cause false errors and symptoms.
one column on the left is required to describe the error symptom.
replacing the component.
FRU/action
An error has occurred that is not represented by a Light Path Diagnostics
LED. Check the system-error log for more information about the error.
1. System-error log is 75% full; clear the log.
2. PFA alert; check error log for failure; clear PFA alert; remove ac power for at
least 20 seconds, reconnect, then turn on server.
3. Run diagnostics.
1. See the system-error log.
2. Microprocessor 1-4.
Note: To see microprocessor error LEDs, remove the processor-board
assembly from the chassis, and press the LED activation switch.
3. Processor board.
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