Not entirely related, but you guys seem to know a lot about these TV's. I have an Aquos42 and last night the black or dark colors started getting blotchy, pixelated and dark purple. I tried adjusting the birghtness/contrast/ etc from the menu and I thought that I had fixed it, but after it is on for about 15 minutes or so the purple starts coming back. After about a half hour it is horrible - the image is practically shot. If turned off for about an hour, it goes back to starting out normal. After swapping out things through the process of elimination, it's not the cables, not the box, it's the TV. I can't seem to find anything quite like this anywhere else, so I submit to your expertise. Any thoughts, theories?