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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!ihnp4!inuxc!iubugs!iuvax!franco
From: franco@iuvax.UUCP
Newsgroups: net.micro.atari
Subject: Re: 1meg upgrade killer
Message-ID: <500025@iuvax.UUCP>
Date: Sat, 4-Jan-86 18:21:00 EST
Article-I.D.: iuvax.500025
Posted: Sat Jan  4 18:21:00 1986
Date-Received: Thu, 9-Jan-86 02:58:19 EST
References: <11106150@ucbvax.UUCP>
Lines: 20
Nf-ID: #R:ucbvax:-1110615000:iuvax:500025:000:1242
Nf-From: iuvax!franco    Jan  4 18:21:00 1986


The fact that your screen has raster for two seconds and then goes blank
does not mean that you fried anything.  My guess is that all chips are
fine.  Look for solder bridges (your new connections) in the following
way: hold the board up to a strong light (light is on the underside of the
board and you are looking from topside of board) and USING A 10X MAGNIFYING
GLASS (important - use a GOOD magnifying glass) scan all new connections
visible from topside for bridges.  Then, turn the board over and inspect
all new capacitor connections.  If you bent the capacitor leads too much
one or more may be making contact with some trace.  Then, reseat the 
memory controller chip.  Sometimes board flexing will unseat that chip.
I suggest you do all this work on a table covered with sheets of aluminum
foil and make sure you, the board and anything that contacts the board are
at the same electrical potential by keeping everthing in contact with the
foil (with the power off, of course) as often as possible.  When you power
up make sure the aluminum foil is somewhere else.  This message is being
brought to you by a fully functioning 1MEG 520ST.

P.S.  If the above fails I will buy the board from you (with everything
on it) for, say $50.