I am working on a Williams Planets that when you start a game it will keep cycling, like it is looking for the ball. When you get it to catch and start a game, once the first ball is drained, it starts cycling thru the balls again. EMs are NOT my strong point and to be honest, I am not sure where on this machine to start looking.

Any suggestions?

Thank you both very much! EM's are my weakness. I have been trying to buy a couple cheap ones, to mess with in my free time, but you know how that goes

This gives me a good idea of what to look at when I go back to it this weekend.

I finally got a chance to spend some time on this planets table. When you start a game, it will usually run thru all the balls in a row. Like it says balls one, then before you do anything it cycles through to ball 5. Sometimes it will stay on ball one, sometimes it will cycle to ball four and stop. It seems pretty random. The only things I can find currently that are an issue, is the lock relay coil is burnt up and broken.. but oddly still works and the contacts on the bakelite for the ball count unit seem heavily worn, with a visible groove. However, I seem to have continuity everywhere on that. I'm going back in a couple days, when I get parts in for another of their pins.

Thank you for that! I do not remember seeing the tilt light come on. But I will definitely check for it when I am back there this week.

So the problem turned out to be a nut had dropped between the game over relay and the Tilt relay and was down so low I couldn’t see it.

I would have never found it without your help so thank you very much.