Recently I had an issue onmy Top Score. Whenever a rollover was hit, it would score a bonus even though some rollover targets were not lit for a bonus. They still scored bonuses. I examined the solder tabs on the relays and found one on the relay that controls the bonus that was bent enough to make contact with the adjacent terminal. Straightened it and it was fixed. I suggest you examine every wire coming out of every relay and straighten any kinked wires and tabs.