I just bought a C64 with a 1541 disk drive and a few games. My problem is the display, When i turn on the machine the screen fades front left to right as a white screen, Once it's on the start up screen, it is purple and not blue, Once I load a game the screen looks normal for half a second then fades to a white background, I can still see the game but it looks terrible. Ive tried the rf switch and the a/v cables the machine came with. Can anybody help?