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From: LEEK@QUCDN.QueensU.CA
Newsgroups: comp.sys.amiga
Subject: Re: Harddrive Problem
Message-ID: <90207.091452LEEK@QUCDN.BITNET>
Date: 26 Jul 90 13:14:52 GMT
References: <963@richsun.cpg.trs.reuter.com> <1990Jul24.193214.29667@sbcs.sunys
 <26ad143b-2580.3comp.sys.amiga-1@tronsbox.xei.com> <571@oregon.oacis.org>
Organization: Queen's University at Kingston
Lines: 29

In article <571@oregon.oacis.org>, jmeissen@oregon.oacis.org ( Staff OACIS)
says:
>
>I had something equally as mysterious happening. I have a rev 4.2 A2000, with n
>a A2090 and C='s 2-meg ram expansion. About every couple of months, it
>would suddenly start crashing, for no reason. I could boot it and leave
>it untouched for a while and come back and it would be flashing the ol' red
>GURU. The problems would get worse and worse, until it wouldn't even
>reboot,crashing at random spots during the boot process  Power cycling
>didn't help (even leaving it off for days at a time....turn it on and instant
>GURU). The only thing that would fix it was opening it up and removing the
>boards and putting them back. Then it would work fine for another couple of
months. It got to be a regular thing, and I got quite good at popping the cove r
and reseating the boards. Finally I tried swapping the physical positions of
the boards, and I haven't have a problem since (except, of course, when the
room temperature exceeds 100 degrees
>:-)
>I don't question what works. :-)
>
>--
>John Meissen .............................. Oregon Advanced Computing

Sounds like you have a bad contact problem (more like oxidation problem).
The physical action of unplugging/plugging the board remove some of the
oxide and hence problem gone until more oxide built up.  As for the reason
why the board swap works ... May be one of the boards have a gold plated
connection

K. C. Lee