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From: tgoose@eng.umd.edu (Jason Garms)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Tragic SIMMS installation
Message-ID: <1991Apr23.163613.10397@eng.umd.edu>
Date: 23 Apr 91 16:36:13 GMT
References: <41443@cup.portal.com>
Sender: news@eng.umd.edu (C-News)
Reply-To: tgoose@eng.umd.edu (Jason Garms)
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Organization: College of Engineering, Maryversity of Uniland, College Park
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In article <41443@cup.portal.com>, Drako@cup.portal.com (Chris Del Grande) writes:
> 
[stuff deleted...]
  >         He first suspected that he had accidentally clipped the wrong 
  > resistors (R35 & R36) but upon further examination everything was in order.
  > The 1 meg chips were also in the proper rows/banks, etc. All wires and cables
  > were intact also. The mac still would not startup properly.
There are atleast 4 different revisions of the logic board and some require
the higher density SIMMs closer to the CPU (in the back) and some require them
to be farther from the CPU (in the front).  Did your friend try it both ways?

  >         He took the machine to a local Mac dealer who said it was a fried
  > CPU (I believe) and charged him > $400 for a replacement. Does this seem in
  > order? My friend says that he didn't touch any of the other components and 
  > such, so just how sensitive are these inner components to the human presence.
  > Any information would be greatly appreciated...(his dad didn't appreciate the
  > VISA charge and would like some answers.)  Thanks!

Actually the most common cause of the symptom you just described is a problem
with the ROMs.  This can usually be corrected by just replaceing the ROMs.
Many Apple dealer don't do this. (or maybe they don't realize that they can do
this).  A possible cheaper alternative would have been to have an FDHD ROM
upgrade installed.  This would only have cost about $100 instead of the $400.

Jason Garms
tgoose@eng.umd.edu