Sun Microsystems 220R service manual Error Indications, Front Panel LEDs, Keyboard LEDs

7.12.1Error Indications

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

The system provides fault LEDs in the following places:

Front panel

Keyboard

4Power supplies Disk drives

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

7.12.1.1Front Panel LEDs

Front panel LEDs provide your first indication if there is a problem with your system. Usually, a front panel LED is not the sole indication 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 whenever POST or OBDiag detects any kind of fault ( including a fault reported by a power supply).

7.12.1.2Keyboard LEDs

Four LEDs on the Sun Type-5 keyboard are used to indicate the progress and results of POST diagnostics. These LEDs are on the Caps Lock, Compose, Scroll Lock, and Num Lock keys as shown below.

Note - A keyboard is not shipped with the system. To read keyboard LEDs you must obtain a keyboard of the appropriate type (see the following graphic) and connect it to the keyboard/mouse port on the system's back panel.

212 Sun Enterprise 220R Server Service Manual ♦ January 2000, Revision A