My Game seems to operate correctly when set on 3 ball play.
When set to 4 ball play there are 13 switches (including the pop bumpers) that award a bonus ball in the animated back box every time they are hit.
They should not award a bonus ball unless they are lit. This happens on all players in 5 ball play.
To make matters worse when the first ball is launched and hits one of the bonus switches the animated bonus unit cycles continuously adding balls and
only stops when I turn the machine off. This doesn't happen all the time but is something that just started happening.
I've read everything I can find on the net about Gottlieb bonus issues but have found nothing like this one.
I have the schematics but don't understand them well. I have closely looked at all the relay switches, control bank switches and player unit switches
for proper gap and contact. Did the same with the score motor. Seems there must be a closed switch somewhere that shouldn't be. I don't know where else to look.
Other than this problem the game functions beautifully.
I hope someone here can push me in the right direction.