Quoted from FlippinJimmy:I have highlighted the switch in question for clarity
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That's the slam tilt switch; that's not your problem, if it was tripped you'd be in GAME OVER mode. Do you have a schematic... most likely you've got a runout/0 position switch on one or more of your score reels in the incorrect position or dirty. Also look for disconnected wires on each of the score reels... chances are you've got at least one that needs re-soldering. If that turns out NOT to be the issue you'd have to review the schematic to see what other relays/units could be at fault.