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From: ekijak@ARDEC.ARPA.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: Monitor Problems
Message-ID: <8701291631.aa21536@ARDEC-3.ARDEC.ARPA>
Date: Thu, 29-Jan-87 16:31:11 EST
Article-I.D.: ARDEC-3.8701291631.aa21536
Posted: Thu Jan 29 16:31:11 1987
Date-Received: Fri, 30-Jan-87 06:41:47 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 11

If bottom of display is not parallel with bottom of screen, sounds like the
magnetic deflection yoke on the neck of the picture tube has shifted.  This
can also shift the whole display to the right or left (or up or down) as was
stated also happened.  No need to adjust any controls, just reposition the yoke
(coils of copper wire surrounding neck of picture tube) until position of dis-
play is correct, and then tighten the screws to keep it there.  Be careful,
high voltages exist inside the chassis!
     As I was writing this, the thought occurred to me that there is another
thing that could shift the display and rotate it in relation to the screen
itself -- a magnet!  Make sure you don't have any accessory which creates a
strong magnetic field in close proximity to your display.