Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!mcsun!cernvax!chx400!ugun2b!ugsc2a!kanala
From: kanala@sc2a.unige.ch
Newsgroups: comp.sys.mac.hardware
Subject: Re: Portrait Display problem
Message-ID: <269@sc2a.unige.ch>
Date: 14 Oct 90 19:23:10 GMT
References: <1990Oct9.210021.24473@Neon.Stanford.EDU> <1990Oct9.230536.6653@hayes.fai.alaska.edu>
Organization: University of Geneva, Switzerland
Lines: 43

In article <1990Oct9.230536.6653@hayes.fai.alaska.edu>, ftdkl@acad3.fai.alaska.edu (LaSota Daniel K) writes:

> In article <1990Oct9.210021.24473@Neon.Stanford.EDU>, philip@pescadero.Stanford.EDU (Philip Machanick) writes...

>>I have an Apple Portrait Display (fancy name for A4/full page). The
>>general display quality is good, but there is a downward slope at the
> .
> .
>>anyone know what the problem is and how to fix it?
>>--
>>* horizontal lines come out looking like this:
>>    _______
>>   /
>> /
>>/
>>(though obviously not as bad).
>>-- 
>>Philip Machanick
>>philip@pescadero.stanford.edu
> 
> Although I don't know what would cause this a friend of mine has the same
> problem.  I also have a Portrait display and noticed a wicked squeal.
> It is now being replaced.
> Anyone else have problems witht he Portrait monitor?
> 
> Dan LaSota
> ftdkl@acad3.fai.alaska.edu                 

And now what am I writing:
I suspect there is no remedy to this. Problem may be caused by an
anomaly in wiring of inductance cathode ray electron beam deviator
(I do not know the exact "terminus technicus").
If this is true, then the only solution is to have a very friendly
dealer who lets to test twenty or fifty monitors in order to find one
that is acceptable.
At our institute, we have one Apple A4 monitor who makes this (upper left
corner):   :
            :
             :
             :
(Should be a vertical line near to edge.)  It is independent of video
board used (Apple, Nutmeg) and Mac (SE/30, II, IIfx).
Roman Kanala, CUEPE, University of Geneva, kanala@sc2a.unige.ch