IBM 866251Y - Netfinity 5500 M20, Hardware Maintenance Manual

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Diagnostic tools
The following tools are available to help identify and
resolve hardware-related problems:
Ÿ
Diagnostic Programs
Ÿ
Power-on self-test (POST)
Ÿ
POST beep codes
Ÿ
Error messages
Ÿ
Troubleshooting charts
Ÿ
Option diskettes
For a list of error codes and messages, see
“Symptom-to-FRU index” on page 285.
Diagnostic programs
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, such as the the system board,
Ethernet controller, video controller, RAM, keyboard,
mouse (pointing device), diskette drive, serial port, and
parallel port. You can also use them to test some external
devices.
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.
Note
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.
To run the Diagnostic Programs, see “Running diagnostic
programs” on page 14.
For a list of error codes and messages, see
“Symptom-to-FRU index” on page 285.
Power-on self-test (POST)
When you turn on the server, it performs a series of tests
to check the operation of server components and some of
the options installed in the server. This series of tests is
called the power-on self-test or POST.
POST does the following:
Ÿ
Checks the operation of some basic system board
operations
Ÿ
Checks the memory
Ÿ
Compares the current server configuration with the
stored server configuration information
Netfinity 5500 M20 - Type 8662
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