I have a flat-screen (but not flat) LCD here, and the picture is a little off. It's hard to explain, one day while I was watching the blue element of the screen just suddenly shifted. Now everything, especially light colors, show a blue ghost of the screen image that is offset by a few inches. The next morning everything was normal for a couple of minutes, then it came back like it overheated or something. Does anyone know what this is or how much it may cost to repair?