My Bally Hotdoggin’ has been working great, then both flippers on the right stopped working. I checked all wiring and found no loose connections. Filed flipper button contact as well. Thinking it might be Driver Board related, I swapped out the board with a new Alltek and no change. Put existing board back in and cleaned pins on J1 & J2 and checked/wiggled connections while holding down flipper button, nothing.

Next, I tried this from minnesota13 on another post: “Run a clip lead from the working flipper coil voltage in -- the end lug with the diode stripe to the equivalent lug on the non working flipper.
Then if the non-working flipper now works it's the flipper power pin associated with the driver board. If it doesn't work look for a ground path problem.”. I get nothing on either right dead flipper which tells me I may have a grounding issue?

How should I troubleshoot this problem further?

As always, THANKS!

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Thanks for your response. I’ll give that a try but there are two flippers on the right side, both dead, and unlikely the EOS switches failed simultaneously. Also I swapped the driver board with a new one and it didn’t correct the issue.

Fixed! ghostrachel BigAl56 yep, it was the normally closed switch on the lower flipper. Filed it and the EOS and everything works again. Yes, I will be rebuilding these flippers soon. Thanks all!

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