Sun Microsystems 220R About Troubleshooting Your System, Error Indications, Front Panel LEDs

About Troubleshooting Your System

The system provides the following features to help you identify and isolate hardware problems:

■Error indications

■Software commands

■Diagnostic tools

This section describes the error indications and software commands provided to help you troubleshoot your system. Diagnostic tools are covered in “About Diagnostic Tools” on page 118.

Error Indications

The system provides error indications via LEDs and error messages. Using the two in combination gives one a high degree of confidence that you can isolate a problem with a particular field-replaceable unit (FRU).

The system provides fault LEDs in the following places:

■Front panel

■Keyboard

■Power supplies

Error messages are logged in the /var/adm/messages file and are also displayed on the system console by the diagnostic tools.

Front Panel LEDs

System front panel LEDs provide your first indication if there is a problem with your system. Usually, a front panel LED is not the sole indicator of a problem. Error messages and even other LEDs can help to isolate the problem further.

The front panel has a general fault indicator that lights to indicate a problem with the power supply subsystem. See “About the Status and Control Panel” on page 7 for more information about the two LEDs and their meanings.

138 Sun Enterprise 220R Server Owner’s Guide • October 1999