Hey Brett,
The only thing I can think of is that your TV uses three seperate "projectors" for the three colors, RGB (red, green, blue) and it sounds like your red projector is not perfectly alligned with your green and blue projectors. This usually happens over time due to heat. The only other issue might be that the lamp in your red projector is going out and might need replaced. That would cause the red arch on your picture.
hope that helps,
Patrick Sewell
February 2008
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