Operation Manual

6. For intermittent problems, check the error log; see “POST error logs” on page
17 and “Diagnostic programs and error messages” on page 22.
Complete the following steps to perform the checkout procedure:
001 IS THE SERVER PART OF A CLUSTER?
YES. Schedule maintenance for the server. Shut down all servers related to
the cluster. Run the storage test.
NO. Go to step 002.
002 IF THE SYSTEM IS NOT PART OF A CLUSTER:
If the operating system is running, complete the following steps:
1. Check the light path (see “Light path diagnostics” on page 18).
2. Check the service processor system-error logs:
a. If the system-error log indicates a damaged field replaceable unit
(FRU), replace the FRU, and run diagnostics to confirm that the
problem has been solved.
b. If the system-error log does not indicate a damaged FRU, see “Error
symptoms” on page 121 and “Undetermined problems” on page
136.
If the operating system is not running, complete the following steps:
1. Check the light path (see “Light path diagnostics” on page 18).
2. Check the service processor system-error logs.
a. If the error log indicates a damaged field replaceable unit (FRU),
replace the FRU, and run diagnostics to confirm that the problem
has been solved.
b. If the error log does not indicate a damaged FRU, check the
operating-system event logs; if these logs do not specify a particular
error, go to step 3.
3. Turn off the server and all external devices.
4. Check all cables and power cords.
5. Set all display controls to the middle position.
6. Turn on all external devices.
7. Turn on the server.
8. Watch the screen and the serial port for POST errors, and record any
POST error messages that are displayed on the screen. If an error is
displayed, look up the first error (see “POST error codes” on page 88).
9. Run diagnostics (see “Starting the diagnostic programs” on page 23).
003 DID THE DIAGNOSTIC PROGRAM START?
NO. Find the failure symptom in “Error symptoms” on page 121.
YES. Run the diagnostic programs. If necessary, see “Diagnostic programs
and error messages” on page 22.
If you receive an error, see Chapter 6, “Symptom-to-FRU index,” on page
85.
If the diagnostic programs were completed successfully and you still
suspect a problem, see “Undetermined problems” on page 136.
If the server does not turn on, see “Error symptoms” on page 121.
16 IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide