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This article was posted to the Usenet group alt.hackers in 1995; any technical information is probably outdated.

How to fix a Mac PowerBook

Article: 7520 of alt.hackers
Newsgroups: alt.hackers
From: (Jon P. Knight)
Subject: How to fix a Mac PowerBook
Sender: (Usenet-News)
Approved: me
Date: Thu, 16 Mar 1995 10:55:05 GMT
Organization: Dept of Comp. Studies, Loughborough University of Tech., UK.
Lines: 32
Status: RO


I picked up an Apple PowerBook 140 6/20 about a year ago for about 400
pounds (it was a refurbished ex-Apple internal usage machine).
Everything was fine and dandy except that after a few months the LCD
display would suddenly go black and I'd have to thump it a bit to get it
to come back on.  A bit annoying but not a real problem.  Anyway, about a week
ago the display finally gave up the ghost completely; no amount of
thumping or twisting would bring it back to life.  I managed to get hold
of a no. 8 Torx screwdriver (I really must buy a set of these for
myself!) and opened up the display case.  As I did so, the display came
back on.  Ah great I thought.  As I pushed the display case back on, the
display went off again.  Bummer.

Time for a hack: I moved the display case back and forth and noticed
that it was moving a thin plastic ribbon cable on the right hand side of
the LCD by pressing down on some metalicised cardboard (which I assume
is some sort of shield).  The cable was firmly seated in its connectors
so I could only assume that it had a broken track or loose joint that
was being separated by the pressure of the cardboard pressing against it.  To
overcome this I simply cut a strip out of the cardboard shield around
the ribbon cable.  When I put the display case back on, there was no
cardboard to press against the ribbon cable and so the LCD carried on
working.  Bingo!

As I'v heard lots of people whinging about the cost of replacing PB140
LCDs I thought I'd pass this on for your delictation and delight.

<A HREF=""> Jon Knight
* Its not how big your share is, its how much you share that's important. *

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