Lenovo 1044 System event log, Diagnostic LEDs on the front control panel, Onboard debug digitron

System event log

The system-event log contains messages of three types:

Information	Information messages do not require action; they record significant 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 10 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 95