Thank you, I also received a response from David Humphrey yesterday via email, he designed the Ni-Wumpf MPU replacement board. He mentioned a possible coating of rewash may be the issue, told me to clean the tinning with an eraser and see if that corrects. He didn't mention checking the option...
My Sinbad solid state machine, the second yellow and last purple drop targets do not score points when dropped. I checked the wire harness connections on the board and they are all good. All switch contacts are good. All switch matrix diodes are good. The machine was upgraded to new boards prior...
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