Sun Microsystems Enterprise 250 Owner's Manual page 238

You can choose to run an abbreviated POST with concise error and status reporting
or run an extensive POST with more detailed messages. For more information, see
"How to Set the Diagnostic Level for POST and OBDiag" on page 234.
What to Do
1. Ensure that the front panel keyswitch is in the Standby position (
2. Turn the keyswitch to the Diagnostics position (
The system runs the POST diagnostics. POST displays status and error messages on
the system console or on an RSC console, if the RSC software is configured to
display POST output. 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 223 and "How to Use OpenBoot Diagnostics (OBDiag)" on page 230.
Results
While POST is running, you can observe its progress and any error indications in the
following locations:
System console or Remote System Control (RSC) console
Front panel fault LEDs
Keyboard LEDs (if a keyboard is present)
You can also obtain a summary of POST results by using the .post and .rsc
commands.
Observing POST in Progress
As POST runs, it displays detailed diagnostic status messages on the system console
(or on an RSC console, if POST output has been redirected to an RSC console). If
POST detects an error, it displays an error message on either the system console or
the RSC console that indicates the failing part. A sample error message is provided
below:
Power On Self Test Failed. Cause: DIMM U0702 or System Board
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220 Sun Enterprise 250 Server Owner's Guide • June 1998
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