Recently purchased this SWT, played one game and everything seemed to work correctly. Did a light shop on it with slingshot assemblies replaced, flippers rebuilt and a few coil sleeves changed out. Set the game up at my friends and the left flipper isn't working. All fuses are good and properly amped, and flipper buttons and EOS seemed gapped equivalent (I cleaned the flipper switches with alcohol on a cotton swab). I had placed both flipper assemblies on Molex connectors. If I connect each flipper connector to the opposite flipper coil, they both seem to work. If I connect them back properly, the left doesn't work. Although occasionally when pressing the left button, the flipper mech "wiggles" a little bit but doesn't flip. I left the game to do some research. My friend called me to say he fired the game back up and played two full games and everything worked fine, then he lost the left flipper. He hit both flipper buttons simultaneously and both flippers worked, then he lost the left flipper. I'm a bit stumped at the moment. Anyone have any thoughts?

Yes. Thinking there is a loose connection or something . My friend elaborated - when hitting both flipper buttons at the same time, they both work, and then with buttons still pressed in, the left flipper drops to resting position, the right one stays up. He tried connecting the flipper mechs to the opposite Molexes and the opposite occurs.

Wow. Found my problem. Down in the coindoor switch area, I didn't take a good enough picture. I connected a connecter together that obviously was grounding something out. The connectors looked like they went together. My bad, they don't. Pulled it apart and the game plays awesome.

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Damn. Spoke too soon. Still an intermittent issue. Back to the drawing board.

I think the issue is fixed. Most of the time in pinball it tends to be something stupid or simple. I ended up reseating most of the board connectors and the ribbon cables, and adjusting the shooter lane switch since it started auto firing. Not sure if it was any one thing that caused the issue, but I'm not going to rethink it too hard. Game is playing very well right now and the left flipper has not ceased to flip once.