Sorry to keep annoying you all but cant find much info on the 80b online but the new CPU arrived for Rock which has the game up and running 
Only a couple of issues but the main one is the sound board doesnt fire up. But if i push the sw2 button the sound board boots up and all music etc works fine. Any input on how to fix this?
Lets be clear please on what is happening when you push switch 2. This is sw 2 on the sound board. Does it then go into a demo mode and play each sound? Or does it then just turn on and operate normaly during game mode? This switch when pushed triggers a gate that sets the reset signal pin 40 on T3 which is the 6502 CPU.
I dont have schematics but if it plays each sound from the test button, I would assume the sound board and its supply voltages are Ok. The signals to trigger the sounds, S1, S2, S3, S4 etc come from the driver board.
Can you please confirm excactly what you mean is happening when you push S2.
