DECstation 2100: power trouble?

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

I've got a machine.  The case calls it a DECstation 2100 and the bottom
sticker says "CPU KN01".  It does have (what is marked as) a MIPS CPU
chip and the motherboard silkscreen has, among other things, the
|d|i|g|i|t|a|l| logo and the text "KN01 54-19463-01", so I'm reasonably
sure it is indeed a 2100.

I tried turning it on.  The lights stuck at EF.  I pushed the reset
switch and they changed tp 7F, then back to EF.  I pushed the reset
switch again and they flickered in a way that to my eye said "flaky
connection to the LED common, or flaky power" (they flickered
irregularly, all exactly in sync as near as my eye can tell).

I opened it up and there is nothing obviously wrong to my eye.  Nothing
looks overheated to the point of damage and none of the caps in the
power supply are visibly bulging, nor is there obvious mechanical
damage apparent.

Given the thing's age, though, flaky power seems more likely than
something like a bad etch run giving an irregular connection to the LED
common.  Just because caps aren't bulging doesn't mean they're certain
to be good, after all!

But the power supply connector has something like eight different
colours of wires across 14 pins.  Does anyone know the pinout of that
connector - that is, what voltages I should expect on what pins?  Also,
is the power supply capable of running with no load?  (I've run into a
few that aren't, including some that let out the magic smoke upon being
powered up with no load.)  I've got a fairly decent multimeter (a Fluke
87), so I can measure, but I'd like to know what I *should* get so that
I can tell whether what I *do* get is good.

If the voltages are compatible and the PS appears to be nonworking, I
could hook it up to a boring peecee supply just to get the silly thing
working; while I'd rather use the original supply, for my purposes I'd
prefer a working FrankenPMIN to a dead original-equipment PMIN.

/~\ The ASCII				  Mouse
\ / Ribbon Campaign
 X  Against HTML		mouse%rodents-montreal.org@localhost
/ \ Email!	     7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B