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System event log
The system-event log contains messages of three types:
Information Information messages do not require action; they record signicant system-level events,
such as when the server is started.
Warning Warning messages do not require immediate action; they indicate possible problems, such as
when the recommended maximum ambient temperature is exceeded.
Error
Error messages might require action; they indicate system errors, such as when a fan is
not detected.
Each message contains date and time information, and it indicates the source of the message (POST).
Diagnostic LEDs on the front control panel
Identifying the diagnostic LEDs on the front control panel is a very important method for diagnosing server
problems. See “Front control panel” on page 11
for detailed information.
Onboard debug digitron
The onboard debug digitron helps trained service technicians to identify server problems. When you turn on
the server, the onboard debug digitron will display debug code on the screen.
Chapter 7. Troubleshooting 99