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From: sysop@stech.UUCP (Jan Harrington)
Newsgroups: comp.misc,comp.sys.mac
Subject: Re: Leaving a Mac on 24hrs (power supply)
Message-ID: <135@stech.UUCP>
Date: Sat, 22-Aug-87 06:18:44 EDT
Article-I.D.: stech.135
Posted: Sat Aug 22 06:18:44 1987
Date-Received: Sun, 23-Aug-87 16:02:08 EDT
References: <5180@ihlpa.ATT.COM>
Organization: Scholastech, Inc., Waltham, Mass.
Lines: 26
Xref: mnetor comp.misc:1093 comp.sys.mac:5885

in article <5180@ihlpa.ATT.COM>, prgclb@ihlpa.ATT.COM (Blesch) says:
> 
> I just got a new power supply in my Mac 512K enhanced (I've heard
> from more than one Mac owner that power supplies aren't the most
> rugged component, to put it tactfully), and I noticed the same thing.
> The screen is fuzzy for the first several minutes.  Patterns with dots
> close together (like the desktop and the scrolling bars) shimmer, and
> letters aren't very crisp.  After a while, things look okay.
> 
> Are these things normal?  I'm going to ask the repair person, but


Normal?  No way.  The symptoms you describe are generally associated with
a power supply that's going to fail. Please take that Mac of yours back
to the repair shop post haste.  Get the technician to adjust the power supply
and whatever other components necessary to get rid of your video problem.

You see, the video driver and the power supply are on the same board ...
One of the most common systems of a power supply that's about to go to
Mac heaven is oddities in the video.  Something isn't right, even though it
straightens itself out once the macine warms up.


Jan Harrington, sysop
Scholastech Telecommunications
seismo!husc6!amcad!stech!sysop