Rich,
The CPU went OK then, as I couldnt test in a machine?
Can you post some footage of your game with sound, we will see if we can get you fixed.
I had to socket the rest of the IC's and replace the roms using 2732's as I was having intermitent boot problems but apart from that thanks for repairing the corosion etc.
Go back a page Dean and you'll see my footage there (on utube)
Could the sound prom on the pcb have a problem?