I've search several sun hardware groups, several sun hardware faqs, and still,
I can't find anything that describes this behavior.
I've removed both the RSC card, and the vga card, leaving only the serial
connection.
When I boot into diagnostic mode I see:
... snip 15min of tests ...
System is operating in Service Mode.
Reading temperature limits from FRUPROMs: CPU0/2 CPU1/3 MB I/O DBP0
Environmental monitor is ON
{3} ok
At which point it accepts no input. Bugger.
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