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Article #474

Dark line on PB 520c screen?

#474
From: Carl Edlund Anderson
Date: Mon, 01 Jun 1998 00:00
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     During the course of normal operations this morning a mysterious line
of darkened pixels appeared on the screen of my PowerBook 520c.  It started
at the bottom of the screen, about 6/10ths of the way over from the right
hand side and ran up to about the middle of the screen.  It appeared
generally as a line of darkened pixels, but would sometimes switch to oddly
coloured pixels--the pixels were never actually non-functional, since they
still could show correct colours and shapes depending on what the
background or window in their region happened to be.

     I immediately panicked, of course, and ran every kind of test and
maintenance utility that I had.  I didn't expect this to do much, and I
don't think it did, but after 30 minutes or so this line "dimmed" to appear
as a line of pixels slightly greyer than they should be.  The line is still
pretty much detactable as I type now, though not nearly as gruesomely
distracting as it was.

     This leaves me with the nagging worry that the problem will
re-intensify, probably worse than before, without warning.

     Anyone familiar with this or similar problems? I can't quite figure
out what's going on, but this is the only passive matrix colour screen I've
worked with.  It _was_ built in 1991, so it _is_ getting on a bit, but it's
still worrying.

     BTW, does anyone know a good Cambridge-area (UK) Apple service place
*besides* the Apple Cambridge BusinessCentre?  Last time I dealt with them
it was a nightmare of the first order ...

Cheers,
Carl

Cheers,
Carl

-- 
Carl Edlund Anderson
Dept. of Anglo-Saxon, Norse, & Celtic
St. John's College, University of Cambridge
mailto:cea20@cus.cam.ac.uk
http://hea-www.harvard.edu/~carl/
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From: cea20@cus.cam.ac.uk (Carl Edlund Anderson)
Subject: Dark line on PB 520c screen?
Date: 1998/06/01
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