So I have an S-Drive Max, Sofia and Ultimate1MB in one of my 800XLs. Decided to play some Lode Runner today. Title screen plays fune, but after the game starts, the screen starts going on and off. Does not do it on the title screen, just the ameplay. Other games play fine. Also noticed some games that use artifacting are in black and white, while others seem to be OK. Pinball Construction Set is one that comes to mind that is black and white. Is this normal?