On my Stern Playboy the Jackpot will randomly grow during play. Not all the time, but on occasion. I cleaned the switch (it's the grotto in the back) that grow the jackpot but it is still growing on occasion.

What's odd is it just comes up on the screen, it doesn't try to eject the ball so it doesn't seem like the switch is reading it. Anyone have any ideas?

I did the diagnostic test and everything came up ok.

I will check on that...thanks for the tip. Doesn't happen often and really doesnt effect gameplay that much but can give you some cheap points.

Thanks for the Tips Doug and LTG, I'll give it a try tomorrow.

Thanks for the tips guys, played around a bit with it and the issue is fixed. Much appreciated.