Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!usc!rutgers!cbmvax!cbmehq!cbmger!peterk
From: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: More on my sick 2500/30
Message-ID: <1293@cbmger.UUCP>
Date: 4 Jun 91 14:54:34 GMT
References: <9106040619.AA27553@wugate.wustl.edu>
Reply-To: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Organization: Commodore Bueromaschinen GmbH, West Germany
Lines: 25

In article <9106040619.AA27553@wugate.wustl.edu> FINEBERG@WUMS2.WUSTL.EDU (Charlie Fineberg) writes:
>Yet another update on my still sick 2500/30...

Well, I fear this won't apply to your case, but it may serve as a lesson
for me and some others. Only recently we came across a hardware error
that was thought to have disappeared for years but now happened again:

We had an A2000 where no AT Bridgeboard wanted to work at all. All the
bridgeboards worked well in other Amigas, but not in this one. (Similar
things might happen to cards in the CPU slot, but then your error
should disappear when you take out the A2630.) Finally we found that
this was due to a very old version of the casing, more precisely the
bottom part of it. There is one more place (like a nut, I don't know
the precise English word) in the bottom to receive a screw to fasten
the mainboard on the bottom. Now in newer boards there is no hole in
this place, but normal traces. If you now insert a card, the board is
slightly bent, and the traces touch this post (metal) and get shorted.
Luckily this doesn't damage anything, only keeps the bus lines there
from working. - So the general hint: Just look under your mainboard
and search for posts that don't align with a screw. If you find any,
use insulating tape to "debug" it.

-- 
Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 
Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk