Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!ames!pacbell!rbdc!mccann
From: mccann@rbdc (Mike McCann)
Newsgroups: comp.sys.atari.st
Subject: Re: Monitor weirdness
Message-ID: <1990Apr7.130538.19224@rbdc>
Date: 7 Apr 90 13:05:38 GMT
References: <17307@orstcs.CS.ORST.EDU>
Organization: Red Barn Data Center Public Access Unix, Winston-Salem, NC.
Lines: 17

warningm@prism.cs.orst.edu (MICHAEL WARNING) writes:

>My mono(SM124) monitor decided to flip out on me today.  It will jerk the
>screen back and forth horizontally for several minutes, and then shift the
>entire screen to the left.  If you drag a icon or window to the extreme left,
>it will come up reversed as if the left side of the screen had been folded
>on top of the rest of the screen.  All this will start to happen after the 
>monitor has been on for several minutes, and you have to turn it off for a
>minute or so to get it back to normal.

>Is this some common, easy to fix problem, or do I have to get it serviced?
>(It's only about two months old...)
I can't speak for the 124 specifically, but in general, something has happened to your horizontal sync. From your description, it sounds temperature-sensitive. I suspect a bad solder joint, perhaps at the flyback or horizontal-output-transistor (or in those area(s)). Good luck.

EOF
>				Mike Warning
>					warningm@prism.cs.orst.edu