Seems like whenever I get one step ahead with this machine, I'll soon go two steps back.. After start up, the 100's relay in the backbox is buzzing and locking in. I also lost the ball in play lights (the one flashes on start up), and pressing the credit button again doesn't add a player, as the reset relay is energized again and keeps me at player one. Turning the coin unit let's me add players. I've checked the GO relay, reset relay, score motor stacks for a dozen times. I'm at a loss, help would sure be appreciated.

Yes! That was the obvious solution I must've bumped one outlane switch while working. Thanks guys. Now the players get added too. But I still have the problem of the ball in play lights not working.. That would be it!

EDIT: Got it! It was a make or break switch on the GO relay. Darn these things are delicate..