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General checkout
The server diagnostic programs are stored in upgradable read-only memory (ROM)
on the system board. These programs are the primary method of testing the major
components of the server: the system board, Ethernet controller, video controller,
RAM, keyboard, mouse (pointing device), diskette drive, serial ports, hard drives,
and parallel port. You can also use them to test some external devices. See
"Diagnostic tools overview" on page 13.
Also, if you cannot determine whether a problem is caused by the hardware or by
the software, you can run the diagnostic programs to confirm that the hardware is
working properly.
When you run the diagnostic programs, a single problem might cause several error
messages. When this occurs, work to correct the cause of the first error message.
After the cause of the first error message is corrected, the other error messages
might not occur the next time you run the test.
A failed system might be part of a shared DASD cluster (two or more systems
sharing the same external storage device(s)). Prior to running diagnostics, verify
that the failing system is not part of a shared DASD cluster.
A system might be part of a cluster if:
v The customer identifies the system as part of a cluster.
v One or more external storage units are attached to the system and at least one of
v One or more systems are located near the failing system.
If the failing system is suspected to be part of a shared DASD cluster, all
diagnostic tests can be run except diagnostic tests which test the storage unit
(DASD residing in the storage unit) or the storage adapter attached to the storage
unit.
Notes:
1. For systems that are part of a shared DASD cluster, run one test at a time in
2. If multiple error codes are displayed, diagnose the first error code displayed.
3. If the computer hangs with a POST error, go to the "POST error codes" on
4. If the computer hangs and no error is displayed, go to "Undetermined
5. Power supply problems, see "Power supply LED errors" on page 133.
6. Safety information, see "Safety information" on page 149.
7. For intermittent problems, check the error log; see "POST error codes" on page
1. IS THE SYSTEM PART OF A CLUSTER?
YES.Schedule maintenance with the customer. Shut down all systems related to the
cluster. Run storage test.
NO. Go to step 2.
© Copyright IBM Corp. 2000
the attached storage units is additionally attached to another system or
unidentifiable source.
looped mode. Do not run all tests in looped mode, as this could enable the
DASD diagnostic tests.
page 134.
Problems" on page 143.
134.
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Table of Contents
Troubleshooting
