No sure how you are with schematics, but here are the places I would start looking:
The score motor (red arrow) is energized if any of the "normally open" switches are closed (circled in green) or the make/break switch at 1E is "made" (circled in orange)
Personally I would check motor switch 1E first in case its not opening (it should be open at the motor's "home" position.) Then methodically move through the relay switches - starting with any you may have recently cleaned/touched, if any.