I've got a Williams Jolly Roger. Everything works on it except for the game will not start a 2, 3 or 4 player game. No matter how many times I push the start button it only plays a 1 player game. I've got plenty of credits on it. Where would I start to diagnose this problem? I'm fairly new to EM repair.

Also, when I switch on the game, I need to put a coin in for the game to light up and come to life. After this first coin is put in, the game stays on and plays until I unplug it. Is this normal for these older EM pins?

Thanks for these tips. I think I've isolated the problem to a gummed up Coin Unit Stepper. I tried moving it by hand to loosen it up but it still doesn't turn freely like the other steppers. Now to figure out how to remove and clean it.

Follow up: I cleaned the coin stepper and the player stepper. The game is working great now.