Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!eecae!netnews.upenn.edu!rutgers!psuvax1!psuvm.bitnet!ia0
From: IA0@PSUVM.BITNET
Newsgroups: comp.sys.atari.st
Subject: Re: Broken ST
Message-ID: <71682IA0@PSUVM>
Date: 15 Feb 89 17:30:34 GMT
References: <836@wpi.wpi.edu>
Organization: Penn State University - Center for Academic Computing
Lines: 13

I also have a broken 520 STFm, which I was trying to upgrade to 2.5Mb.  The
upgrade unit did not fit well in the case, so I was trying to adjust the
template which pushes into the MMU chip, then powering up and counting memory.
At one point, the system failed to boot.  So I removed the new ram.  It still
won't boot.  The upgrade consisted of a video piggy back card and the MMU
template.  The current symptoms:  no video, no disk-access light, but the
disk head does move a bit when powered up, and I can hear the video whine.
I suspect problems with either the MMU or video chips, since they are the
ones that get moved/plugged-into.  Any ideas?  I'm dead in the water at the
moment.

David Huenemoerder PennState Dept. of Astronomy
internet: dph@astro.psu.edu (128.118.30.150)
bitnet: ia0@psuvm