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From: hgw@julia.math.ucla.edu (Harold Wong)
Newsgroups: comp.sys.mac
Subject: Re: Mac Plus Motherboard from Hell
Keywords: sierra, papa, alpha, november, kilo
Message-ID: <1108@sunset.MATH.UCLA.EDU>
Date: 30 May 89 17:06:37 GMT
References: <14233@pasteur.Berkeley.EDU>
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Reply-To: hgw@math.ucla.edu (Harold Wong)
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Organization: UCLA Mathematics Department
Lines: 37

In article <14233@pasteur.Berkeley.EDU> terence@cory.Berkeley.EDU (Terence Chang) writes:
>
>Mac error code 0300FF (a RAM test failure) which was no surprise,
>because the usual pattern of diagonal stripes that follows a cold
>start was glitched.  Badly.  Columns of extra pixels in the middle
>of the screen and columns of missing pixels on the right side.
>
stuff deleted
>
>	Then I put the Mac on its side and spanked its bottom.  And
>voila!  Up and running without a single misplaced pixel.  First
>there was the cold start and the warm start, and now the Han Solo
>start.  Does anybody know what's really wrong with my Mac?
>

Easy, I had a semi/simular situation.  I has just upgraded the memory in my
SE and it turned out that the SIMM boards were a little too thick.  When I
stuffed the memory into the SIMM Sockets, I broke two of the pins and the
Mac started up with memory error and the missing stripes.

I would guess some of the pins on your SIMM socket lost connection with
the SIMM and when you hit it, made contact.

This is a warning to all Mac users.  If you are upgrading Mac memory, 
watch out for SIMM boards which are too thick.  If it takes effort
to stuff them in, then it's too thick.  Serious damage can result
on your mother board.  Also watch out for SIMM boards which are too
thin.  If they slosh around after you install them, they are too thin
(also, you will not be able to start up the Mac), you might have the same
problem as terence did.


-------------------------------------------------------------------------------

Harold Wong         (213) 825-9040 
UCLA-Mathnet; 3915F MSA; 405 Hilgard Ave.; Los Angeles, CA 90024-1555
ARPA: hgw@math.ucla.edu          BITNET: hgw%math.ucla.edu@INTERBIT