Sun Microsystems 220R manual Results, Observing POST in Progress

To set the diag-switch?to true and power cycle the system unit:

1.When the ok prompt is displayed, type the following command:

ok setenv diag-switch? true

2.At the Sun Type-5 keyboard, power cycle the system by simultaneously pressing the Shift key and the Power-on key. After a few seconds, press the Power-on key again, or press the On/Off button on the system once.

Note –The keyswitch must be set to the Power-On/Off position.

The system runs the POST diagnostics. POST displays status and error messages in the system console. For more information, see the “Results” section below.

Upon successful completion of POST, the system will run OBDiag. For more information about OBDiag, see “About OpenBoot Diagnostics (OBDiag)” on page 126 and “How to Use OpenBoot Diagnostics (OBDiag)” on page 129.

Results

While POST is running, you can observe its progress and any error indications in the following locations:

■System console or through a tip connection

■Front panel fault LEDs

■Keyboard LEDs (if a keyboard is present)

Observing POST in Progress

As POST runs, it displays detailed diagnostic status messages in the system console. If POST detects an error, it displays an error message in the system console that indicates the failing part. A sample error message is provided below:

Power On Self Test Failed. Cause: DIMM U0702 or System Board ok

POST status and error conditions are indicated by the general fault LED on the system front panel. The LED blinks slowly to indicate that POST is running. It remains lit if POST detects a fault.

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