I am having a problem with my donkey kong, i think it may be a sync issue but im not sure. It's an all original game, except for the power supply, it has been changed to a switcher. Sanyo EZ 20 monitor. The game turns on fine but after a while, and the time varies, the video cuts out. sometimes it plays alright for half an hour sometimes it happens right away. the game is still playing and the sound is still on. Not sure if its a sync or a voltage issue. ive tried two different switchers and im getting good voltage so i dont think its the power supply. any help on this would be appreciated. Thanks...