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My guess is the video card is going bad. Try replacing that. If you have a spare monitor you may want to try viewing your desktop on a different monitor before going out and buying anything.

First thing I would check is the cable between your monitor and computer. Swap it for another cable if you can detach it from the back of the monitor. If not, leave it be. The inside of a CRT monitor is a dangerous place. You can get shocked and killed by the voltages in there.

If it is an LCD monitor, then it would almost have to be a video card or driver issue. If not those two, then it would mean the monitor would have to be replaced. But one color would not disappear completely on an LCD> You may lose it in spots, but I've not heard of a full failure of one color on an LCD.

If it is a CRT monitor, you may want to try replacing that. Long story short, CRT's use 3 colors red, blue and green) to create the image you see on the screen. The three colors are controlled by "guns" built into the tube. Each one is operated independently, but are synchronized to each other. If one gun or the components that control it fail, then the picture would be as you described it.

In summary, try another monitor on your computer, or try your monitor on another computer. Then you can see if the problem is in your computer case or the monitor itself.

For testing, you can either borrow a monitor from someone else, or many computer shops will check this for you. A smaller high tech shop may even have a workbench with a monitor set up for customer use, usually for a small fee.

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10y ago

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