Four switches in this circuit. A normally open switch on the center target relay, a normally closed switch on the Index cam of the motor at level A (the bottom switch) which pulses the 300 point relay, the star target switch, and a normally open switch on the gate relay. The 300 when lit light is controlled off the gate relay. I think we can pretty much eliminate the switch since it is scoring 100. My suspicion is the Index Cam nomally closed switch is staying open and thus it cannot pulse the 300 point relay for the proper score. It could be the gate relay switch or the center target relay switches are not closing, but I'd check the motor switch first then go to the others.