Quoted from action76:Check the "Z" connector coming off of the driver board at J114. If you are unfamiliar with this "Z" connector, it is like a coupler/splitter used to split the power so they could drive the aux 8-driver board. If you can disconnect the plugs from the Z connector and the reconnect them tightly and the flipper works then, that is your problem. This is only a temporary fix. You should replace the connector at J114 and crimp the two wires together in the connector with Trifurcon pins and eliminate the "Z" . This fixed mine right up. I got this info from the Pinball Ninja site which I highly recommend.
Bumping an old thread, but I started having this issue today and this is what fixed it!
Pleasanton, CA
