Bios Post Code Checkpoints - Sun Microsystems Ultra 27 Service Manual

B
A P P E N D I X B

BIOS POST Code Checkpoints

Typically, the BIOS displays warning or error messages on the video display in the event of
hardware or configuration errors.
However, if the error is so severe that the BIOS halts immediately or cannot initialize the video,
you can read the last executed POST code from the port 80 LED. The port 80 LED is located on
the lower right side of the motherboard (see Figure B–1).
The BIOS POST codes are listed in Table B–1.
Location of Port 80 LED
FIGURE B–1
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