Quoted from RobAquinas:
Pin-Pilot or anyone out there, I have finally made some progress on this machine. Could you send me some pictures of the under playfield wiring? Maybe four pictures in quadrants will give me enough detail to piece this thing back together.
Something to consider… On pool sharks Wayback in the day, there was a service bulletin. Basically they had assembled the ground braid in the cab wrong from the factory, and in doing so, part of the braid shorted against the voltage for the knocker. So, when the knocker would go off, it would actually blow up the relay on the auxiliary solenoid driver board. When it did that, you would lose it was either the A side or the C side Solenoids. I’ve owned quite a few pool sharks over the years as an operator, plus I love the game for some strange reason lol. But every pool sharks I’ve ever gotten in, I always disconnect the knocker as a preventive measure. You may want to pull that auxiliary solenoid driver board and closely inspect the relay switches on the inside see if any of them were burned or broken. I have had to do this repair on a couple of pool sharks that have past through my hands over the years