Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!sun-barr!newstop!male!sunpix!pak
From: pak@sunpix.East.Sun.COM (Paul Kaiser - Sun Visualization Products)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: COMPAQ power supply connector
Message-ID: <588@sunpix.East.Sun.COM>
Date: 19 Mar 91 01:29:46 GMT
Sender: news@sunpix.East.Sun.COM
Organization: Sun Microsystems, Research Triangle Park, NC
Lines: 23

I have an old COMPAQ Deskpro Model III.
(No, not a Model 386, it is an 8086 machine.  Like I said, it's old.)

The power supply died, and all the COMPAQ dealers I spoke with wanted
over $300 for a new power supply, which is probably more than the machine
is worth.  So I bought an XT-clone power supply from CompuAdd for
$70 (even though the form factor and connectors are incompatible) and
started to build an adapter.

COMPAQ uses a heavy-duty 20-conductor ribbon cable from the p.s. to the
motherboard.  I've got it pretty much figured out except for pin 1, which
appears to be labeled "+5 RST".  Pin 2 is labeled PWR GOOD, for which there
is an equivalent signal from the XT power supply.  I tried to follow the
traces on the COMPAQ power supply PC board, and it looks like pin 1 is
related to PWR GOOD.

Can anyone shed any light on the situation?  The local
COMPAQ-authorized repair center says the power supply connector
isn't described in the repair manual.

Any other suggestions?  (Other than "get a real machine.")
------
Paul Kaiser, paul.kaiser@east.sun.com