IBM 7940, Problem Determination And Service Manual

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Diagnostic programs, messages, and error codes
The diagnostic programs are the primary method of testing the major components
of the server. As you run the diagnostic programs, text messages and error codes
are displayed on the screen and are saved in the test log. A diagnostic text
message or error code indicates that a problem has been detected; to determine
what action you should take as a result of a message or error code, see the table in
“Diagnostic error codes” on page 103.
Running the diagnostic programs
To run the diagnostic programs, complete the following steps:
1. If the server is running, turn off the server and all attached devices.
2. Turn on all attached devices; then, turn on the server.
3. When the prompt Press F1 For Configuration/Setup is displayed, press F1.
4. From the Configuration/Setup Utility menu, select Start Options .
5. From the Start Options menu, select Startup Sequence Options .
6. Note the device that is selected as the first startup device. Later, you must
restore this setting.
7. Select CD/DVD-ROM as the first startup device.
8. Press Esc two times to return to the Configuration/Setup Utility menu.
9. Insert the IBM Enhanced Diagnostics CD in the CD drive.
10. Select Save & Exit Setup and follow the prompts. The diagnostic program
starts.
11. From the top of the screen, select either Extended or Basic .
12. From the diagnostic programs screen, select the test that you want to run, and
follow the instructions on the screen.
For help with the diagnostic programs, press F1. You also can press F1 from within
a help screen to obtain online documentation from which you can select different
categories. To exit from the help information, press Esc.
To determine what action you should take as a result of a diagnostic text message
or error code, see the table in “Diagnostic error codes” on page 103.
If the diagnostic programs do not detect any hardware errors but the problem
remains during normal server operations, a software error might be the cause. If
you suspect a software problem, see the information that comes with your software.
A single problem might cause more than one error message. When this happens,
correct the cause of the first error message. The other error messages usually will
not occur the next time you run the diagnostic programs.
Exception: If there are multiple error codes or light path diagnostics LEDs that
indicate a microprocessor error, the error might be in a microprocessor or in a
microprocessor socket. See “Microprocessor problems” on page 91 for information
about diagnosing microprocessor problems.
If the server stops during testing and you cannot continue, restart the server and try
to run the diagnostic programs again. If the problem remains, replace the
component that was being tested when the server stopped.
Chapter 5. Diagnostics
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