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From: collins@pnet02.gryphon.com (Steven Collins)
Newsgroups: comp.sys.amiga.tech
Subject: Re: A500 hardware problem con't...
Message-ID: <24986@gryphon.COM>
Date: 19 Jan 90 16:00:11 GMT
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Organization: People-Net [pnet02], Redondo Beach, CA.
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I don't recall the layout inside an A500, but in an A1000 it is VERY
easy to cut traces underneath any of the socketed chips by removing them
with a screwdriver. A real chip puller is greatly prefered...
I 'fixed' and A1000 for a friend of mine once this way, but eventually
found it by poking around with a logic probe... There is an excellent
file called 'the flake report' about things that go wrong on amigas.
It has many helpfull suggestions on possible problems and diagnostic
procedures. All I can find is my hardcopy right now, but it suggests
that a ram chip that is failed 'open' can be found by piggybacking
a known good ram chip on top. It also suggests that a bad ram chip 
that is failed 'short' might be hotter to the touch than good rams.

I will upload the whole thing, if I can find it and no one objects
to inflamably...
                                        steve collins

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