Half way through a game the pin will go into reset mode , then play a few more games and it happens again ,just started never had this problem before ,checked the two slam switches on the door and side cabinet both are open, where next

thanks chris is the link you put up good for bally machines or williames or both, the ground strap from the cabinet is connected to the back box

Bally 1978 star trek, yep 7 flashes

i have moved the wiring on the top right connector no resets and the same with j4 on the mpu board they both look good