Hi, I picked up a NDS Lite secondhand and there is something wrong with the touch screen. After ten minutes or so the screen graddually becomes blurry, colours become faint or invert and it gets to the point where it's very difficult to see what's going on. When I turn it off it needs to "cool down" or something for half an hour or so or else the screen will be just as blurry as when I turned it off. The system came with a replacement screen bt I'd like to know exactly what this priblem might be before I disassemble anything. Thanks in advance!