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From: rfl@oddjob.UChicago.EDU (Bob Loewenstein)
Newsgroups: comp.sys.mac
Subject: Re: problem with MacPlus video display
Message-ID: <13995@oddjob.UChicago.EDU>
Date: Tue, 22-Sep-87 11:00:41 EDT
Article-I.D.: oddjob.13995
Posted: Tue Sep 22 11:00:41 1987
Date-Received: Thu, 24-Sep-87 04:38:59 EDT
References: <2409@batcomputer.tn.cornell.edu>
Organization: U of Chicago - Astronomy & Astrophysics
Lines: 11
Summary: it happened to me

> My MacPlus had been working fine until one time when I turned it on, the
> screen was brighter then normal.  I checked the brightness knob and found
> that even after turning it all the way down, the screen was as bright as it
> had originally been at 9/10 brightness, and it adjusted upwards from there.

This happened on two different analog boards to me.  I played around with the
board and convinced myself that both brightness pots were ok. I searched for
flakey solder joints, but found none. Without a circuit diagram, it would have
taken more time to figure out the cause, so I bailed out and spent the $145
for a new board in each case.
>