You can try a stepwise protocol, its worked for me in the past for reasons unknown. First, take everything out: controllers, game, and jumper/expansion pack. Power it on for about 10 seconds and turn off. Add the jumper/expansion and turn on for about 10 seconds. Then add the game and power on for 10 seconds, then try to actually play something. For some reason its worked for me in the past, but I had both video and audio issues. Worth a shot.