Compaq P1220 darkened image and red tint

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jay
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Joined: Thu Feb 04, 2016 5:54 am

Compaq P1220 darkened image and red tint

Post by jay »

I picked up this monitor a couple days ago with this being a known problem. It has an overall red tint that is mostly noticeable on light colors, as well as a darkened image. Contrast/brightness adjustment are maxed, adjusting them only darkens the image further. I can adjust the colors to lessen the effect of the red tint, but the image is still overall pretty dark. Anyone know what the issue with it might be?

Here are some images of what it looks like. It was a little difficult to capture what it looks like since my phone has very little in picture adjustments, but it should suffice.
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Blair
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Re: Compaq P1220 darkened image and red tint

Post by Blair »

jay wrote:Contrast/brightness adjustment are maxed, adjusting them only darkens the image further..
sounds like that monitor is probably on its last legs, and the red tint is probably because one of the electron guns is going out. A dying CRT gun would normally cause a gradual change in color with time.

the blue or green gun is probably dead, (when the red gun dies the screen gets a greenish tint)

without spare parts there's probably no way to fix it
jay
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Joined: Thu Feb 04, 2016 5:54 am

Re: Compaq P1220 darkened image and red tint

Post by jay »

Blair wrote:
jay wrote:Contrast/brightness adjustment are maxed, adjusting them only darkens the image further..
sounds like that monitor is probably on its last legs, and the red tint is probably because one of the electron guns is going out. A dying CRT gun would normally cause a gradual change in color with time.

the blue or green gun is probably dead, (when the red gun dies the screen gets a greenish tint)

without spare parts there's probably no way to fix it
If a gun was dead, wouldn't the adjustment of that specific color do nothing? Unless you just meant that that specific gun is slowly dying. I assume the only way to fix it is change out the tube, which in that case it is probably junk. :s At least it was only $10.
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Blair
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Re: Compaq P1220 darkened image and red tint

Post by Blair »

dead electron gun, dying electron gun, damaged electron gun.

all kind of the same idea, probably not an easy repair even if it was worthwhile (a more expensive/ rare model would probably be the reason to do that) you could go into the monitors RGB settings, you might be of the pull down the other colors to compensate for the damaged gun but the image will still suffer because of it.

another idea is, did you make sure all the pins on the VGA connector were straight and unbroken? (probably a silly question but, I seen all kinds of monitor problems because of damaged VGA connector pins)
jay
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Joined: Thu Feb 04, 2016 5:54 am

Re: Compaq P1220 darkened image and red tint

Post by jay »

Blair wrote:dead electron gun, dying electron gun, damaged electron gun.

all kind of the same idea, probably not an easy repair even if it was worthwhile (a more expensive/ rare model would probably be the reason to do that) you could go into the monitors RGB settings, you might be of the pull down the other colors to compensate for the damaged gun but the image will still suffer because of it.

another idea is, did you make sure all the pins on the VGA connector were straight and unbroken? (probably a silly question but, I seen all kinds of monitor problems because of damaged VGA connector pins)
Yeah, the VGA connector is fine from what I can tell. I've messed with the RGB and contrast/brightness settings in the OSD, no combination really fixes the image being super dark. I went into my GPU settings and I am able to adjust contrast/brightness there with a test pattern, and then adjust the RGB settings in the OSD. It seems like I could get it close to looking 'normal' doing that. Not all that useful to me considering I was going to use it for Wii/DC though. I guess I'll probably be tossing it, hopefully I'll find another one at some point.
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