Re: Dying IIGS Monitor ?!?

[irsman@iastate.edu (Ian Schmidt)]

In article <1JUL199409491615@vax2.concordia.ca> spector@vax2.concordia.ca (Mitchell Spector) writes:

>RGB screens (also having owned and used many others) and it seems what you've
>described is quite normal. When you power up any GS screen after it's been
>off several hours, the bright-level is very low and your forced to adjust the 
>brightness knob to make things visable. As the CRT warms up, it gradually
>gets brighter and brighter until it's at it's optimum level for viewing.

>(like it's going to lose the picture) when I move the brightness knob towards
>the center? Just where you feel it lock in at the center, moving the knob will
>cause the screen to flicker like there's a loose connection or something. I'm
>wondering what the problem is, and if there's a safe way to fix it...

Sounds like a dirty pot; try turning the monitor off then moving the knob
quickly back and forth between the ends of its range to get some of the dirt
and grime worked loose.  This is pretty normal as things age; my TV's volume
knob has similar problems.

>	--And once on the subject, I have another RGB with I believe someone
>may have tampered with the internal controls, though not sure. With the
>brightness knob in default-center, the screen is *exteremly* bright, and 
>I must turn it down to it's lowest setting to come even close to looking the 
>same level of brightness as my other screens. Another thing is the upper region
>of the screen has a kind of red-ish blurr, as if someone had messed with the
>focus setting (the middle and bottom regions aren't affect). The color 
>tint seems rather strange too. I'd try adjusting the internal controls, but

The brightness sounds like maybe a high-voltage misadjustment.  The red blur
and odd tint are classic symptoms of the monitor's having been exposed to a
strong magnetic field to the point where it's internal deguassing coil can't
cope.  A TV repairman should be able to degauss it for you fairly quickly with
minimal cost.

-- 
Ian Schmidt / irsman@iastate.edu / irsman@cs.iastate.edu
"The look in your eyes as you head for the door is a cold fire" - Neil Peart