Do you have a manual and schematic for your bowler? if not you might want to think about getting one. if you cannot find them online you can check www.pbresource.com or www.stl-bb.com. I know on my chicago coin bowler I have a game reset coil I can manually reset and an end of game switch stack that I would check if I had your issues. But without a schematic and voltage meter I'd only be guessing at what right looks like. Also a schematic will tell you if things like that jumper belongs there.
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