Hello this is my first post on this site since I'm new to the hobby and I'm hoping for some help. I just picked up a Caveman Pinball and everything was working as it should. I loaded it up and brought it home and you guessed it. It powers up and seems to be fine. Display and screen seems fine. What doesn't work anymore is it doesnt want to do a self test and the coin op doesn't work. Also I can't seem to get any credits to appear. Not sure what to look for. The $.25 coin lights up. Thanks