IBM xSeries 440 8687, Hardware Maintenance Manual

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Error logs
The POST error log contains the three most recent error codes and messages that
the system generated during POST. The System Error log contains all messages
issued during POST and all system status messages from the service processor.
You can view the contents of the System Error log from the Configuration/Setup
Utility program or from the diagnostic programs.
Viewing error logs from the Configuration/Setup Utility program
Start the Configuration/Setup Utility program; then, select Error Logs from the main
menu. See “Using the Configuration/Setup Utility program” on page 16 for more
information.
Viewing error logs from the diagnostic programs
Start the diagnostic programs; select Hardware Info from the top of the diagnostic
programs screen; select System Error Log from the list that appears; then, follow
the instructions on the screen. See “Starting the diagnostic programs” on page 59
for more information.
Light path diagnostics
The server’s light path diagnostics feature provides a path that can be followed in
four phases to help identify the source of an error. The lights are designed to be
followed in an orderly progression, depending on the error. The lights are viewed in
the following order:
1. Begin on the front panel (see “Server controls and indicators” on page 7).
2. Proceed to the light path diagnostics panel (see the illustration at step 1 on
page 55).
3. Check the lights on the top of the server (see the illustration at step 2 on page
55).
4. Look inside the server, if required.
Many errors are first indicated by the illumination of the system-error light in the
operator information panel on the front of the server (see “Server controls and
indicators” on page 7). If the system-error light is on, one or more lights on top of
and/or inside the server might also be on that can direct you to the source of the
error. This section will describe how to follow this light path.
Note: In a merged system of more than one server, light path diagnostics will
indicate errors on the primary server only.
The following procedure describes how to follow the light path.
Note: Read “Safety information” on page 201., “Handling electrostatic
discharge-sensitive devices” on page 204, and “Working inside a server with
power on” on page 71.
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xSeries 440 Type 8687: Hardware Maintenance Manual