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From: osmigo1@ut-ngp.UUCP (Ron Morgan)
Newsgroups: net.micro.mac
Subject: Jerky screen problem
Message-ID: <3079@ut-ngp.UUCP>
Date: Wed, 19-Mar-86 11:56:14 EST
Article-I.D.: ut-ngp.3079
Posted: Wed Mar 19 11:56:14 1986
Date-Received: Sat, 22-Mar-86 23:45:25 EST
Distribution: net
Organization: Speech Communication UT Austin
Lines: 24

*I've been having a problem with my mac, and wondered if any of you could offer some opinions.

The past three days, my screen has been "twitching." The movement is chara-
cterized by shifting in one direction and then back, "waves" passing through
the text, as if I were looking through a clear gel which wobbled from time
to time. When it's at its worst, I see jagged edges running up and down the
sides of the display, often connected across the screen by lines. 

All of these events are fairly quick. They last from about .2 to .4 seconds.
Factors:

About a month ago, I got a third-party upgrade which involved a board swap.
The cost was $150.00.

The last few days, a roofing crew has been working on the roof of my apartment
building. 

This mac has been on an average of probably 12-16 hours a day for 2 years.
It is kept covered when not in use. Could I be getting power supply problems?

Thanks in advance,
Ron Morgan
osmigo1@ut-ngp.UUCP
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