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Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!apple!portal!cup.portal.com!plav
From: plav@cup.portal.com (Rick M Plavnicky)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga.hardware
Subject: Re: Amiga Screen problems
Message-ID: <34378@cup.portal.com>
Date: 29 Sep 90 17:24:50 GMT
References: <371@shrike.AUSTIN.LOCKHEED.COM>
Organization: The Portal System (TM)
Lines: 26

In a recent posting by vervalin@AUSTIN.LOCKHEED.COM (Paul Vervalin) states:

[chop]
>                   It appears that the interlace [on my Amiga 500] just quits
>working.  One minute the high-res screen will look fine (i.e. all the 
>characters and things are solid), then the screen will kind of jitter a little
>bit and every other line on the screen will go away leaving these very narrow
>lines that (I think) are the background color.
[chop]
>                       I would greatly appreciate any insight anyone can give
>me regarding this problem.  Thanks!!

I hardly think this is worth posting, it's so silly.  But you did say
*any* insight... 

A while back my system began doing the same thing (2000, Sony
CPD1310).  Then one day I happenned to be fooling around with one of
those PAL boot utilities that came across the net.  To stabilize the
screen when swiching back and forth from PAL to NTSC required
adjusting the vertical hold control.  I noticed that by moving the
control just a little bit, I could produce/clear up an effect just
like you describe.  So, try fiddling with the vertical hold.

See?  I told you it was silly... :-)

/* Rick Plavnicky ...!sun!cup.portal.com!plav  -or-  plav@cup.portal.com */