My flash has started blowing the solenoid fuse on startup. Turns out solenoid 1-8 are locked on. If I disconnect the cable 2p11 the fuse doesn't blow. The game boots up, all lamps flashing as the should and sound is working if I start a game.

I've measured the transistors and they seem to be ok. Although the PIA IC5 outputs 5vdc on all of Port A outputs. Port B which drives solenoid 9-16 seems to be ok and sound is working as it should.

I guess it's not uncommon for the PIA to die as I've already changed out the other PIA IC10 on the driver board.

Anything else than a broken PIA that could cause it to output +5vdc on all of Port A? Just thought I would check before I replace it.

I will replace IC5 and see what happens. I haven't replaced the 40 pin interconnect either and by reading it looks like that is very often the fault, I did however measure resistance over every pin and they all seem to have a solid connection.

I replaced IC5 PIA and now everything is back up and running!