Re: IIGS monitor repair

[mjmahon@aol.com (Michael J. Mahon)]

Slick wrote:

>My IIGS monitor is fritzing out. It works for about half an hour, then the
>screen goes blank, and the power light goes out. Pressing the power button
>has no effect. IF I leave it turned off for an hour (or sometimes more) It
>will turn on for a short time, then go out agin.

Before doing anything more radical, try replacing the fuse.  A fatigued
fuse can display this kind of symptom--for a while.  Then it just quits.

The behavior is clearly temperature-related, so spraying (selectively
with a narrow-nozzled tube) circuit cooler on various power-related parts
(since the power light itself goes out, it is almost certainly in the power
supply) _after_ it has cut out, to see what makes it work again when
cooled.  (Circuit cooler is a freon-like liquid which is a wonderful
insulator, so you don't need to worry about shocks or shorts--just
don't get things so cold that they condense a lot of water out of
the air.)

This procedure, BTW, is what a TV serviceman would do to localize
the intermittent open (as well as prodding with an insulated rod).

If you don't feel comfortable working on exposed electronics, don't
practice on monitors.  ;-)

-michael

 Email:  mjmahon@aol.com
 Home page:  http://members.aol.com/MJMahon/