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124 Sun Enterprise 220R Server Owner’s Guide • October 1999
To set the diag-switch? to true and power cycle the system unit:
1. When the ok prompt is displayed, type the following command:
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:
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.
ok setenv diag-switch? true
Power On Self Test Failed. Cause: DIMM U0702 or System Board
ok