Path: utzoo!censor!geac!torsqnt!jarvis.csri.toronto.edu!utgpu!watserv1!watmath!att!cbnewsl!floyd!saf
From: saf@floyd.ATT.COM (Steve Falco,14D-327,4865,ATTBL)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Thoroughness of Mac Boottime Memory Test
Summary: memory seating problems
Message-ID: <4358@cbnewsl.ATT.COM>
Date: 28 Feb 90 14:00:16 GMT
References: <9805@batcomputer.tn.cornell.edu> <39035@apple.Apple.COM>
Sender: nntp@cbnewsl.ATT.COM
Reply-To: saf@floyd.ATT.COM
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Organization: AT&T Bell Laboratories
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> So your problem COULD be flaky RAM (make sure you've seated it correctly/snugly
> since that is a major cause of problem RAM).

I just added 2 megs to a mac+ bringing it up to 4 megs (yeaaaa!)
The first time I installed the RAM I got vertical lines all over the
screen.  Wiggled them a little and everything seemed to be fine.

Sadly, it became a crash-o-matic with MPW staying up for maybe 20
minutes at a time.  The errors were totally random.

I removed all the RAM and painted the connections with Cramolin (a
contact cleaner sold for high-end stereos among others).  I also pulled
off every cable I could find and painted them too (since I had
"dancing-screen" syndrome a while back).

One observation I have is that the new SIMMs seem slightly thinner than
the old ones.  I don't know what the spec is nor did I put a micrometer
on the new ones but I sure would be annoyed if 2 cents worth of
fiber-glass is the root cause of the problem.

Anyway, it ran for 3 hours doing compiles last night with no problems.
Is it fixed?  I hope so...

	Steve Falco   saf@floyd.att.com