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From: davisson@milton.u.washington.edu (Gordon Davisson)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Mac+ Monitor going bad
Summary: Yow, do we need an FAQ yet?
Message-ID: <18376@milton.u.washington.edu>
Date: 14 Mar 91 05:42:26 GMT
References: <1096@anaxagoras.ils.nwu.edu> <1991Mar9.194446.8378@contact.uucp>
Organization: University of Washington, Seattle
Lines: 36

Oh, boy, I get to answer two questions at once!

In article <1096@anaxagoras.ils.nwu.edu> sandell@ferret.ils.nwu.edu
(Greg Sandell) writes:
>I have a 2 1/2 year old MacPlus and the screen is going bad, it seems.
>Now and then the screen simply goes black.  When I give it a hit,
>it comes back on, accompanied by some flicker and a bunch of thick
>black bands across the screen.

And in article <1991Mar9.194446.8378@contact.uucp> jkirsh@contact.uucp
(Joel Kirsh) writes:
:My almost-two-year-old Mac plus has recently developed intermittent "black-
:outs" (maybe I should be crossposting to sci.med? ;-) )
:
:The entire display goes black, but returns with just a slight tap of the
:casing.  Anyone seen this before?  Is it my entire display that's trashed,
:or just a flakey connection here or there?  Am I about to be electrocuted
:by an improperly connected flyback transformer?

Both of you are almost certainly sufering the same problem: a cracked
solder joint on pin 1 of the J4 connector on the analog board.  (It's
the 10-pin connector near the middle of the analog board.  Pin 1 is the
one at the end closest to the front of the Mac, a little seperated from
the other pins.  The function of that pin is to carry the video signal
coming up from the motherboard.)  All you should need to do to repair
it is heat the connection with a soldering iron, and maybe add a little
more solder.  As long as you're at it, you might as well redo the rest
of the pins, and also those on J1 (the 4-pin connector near the top front
corner of the board).  If you don't feel up to doing it yourself and
there's no one in your area who does this sort or work, mail it to me;
I like easy repairs.

--
Gordon Davisson
Westwind Computing	(206) 632-8141
4518 University Way NE, Suite 313, Seattle WA 98105