Remove J2 on the Solenoid Driver. This provides the circuit for the knocker. The game should boot now. I'd say the corresponding driver TIP102 Q3 is shorted on. But how this relates to the issues since re populating the playfield is a mystery, as that solenoid is in the lower cabinet.
you should be able to enter the self test, but the solenoids associated with J2 will not fire. At least you can test the CPU lamps.
