Richmond, VA
Check BR1 on the power supply. Not long ago one of my games started buzzing although it was pretty loud and come to find out BR1 was shorted and kept popping a fuse. Also if its just buzzing with the lights on then remove the screws from the sound board and float from the screws (Normally the wires are strong enough to hold it up for a short test like this. Then turn on the machine and see if the buzzing is reduced / gone. If so you have a ground loop somewhere. I've done the same thing that Dallas_Pin was suggesting with the nylon screws and washers in all my system 11 games and the buzzing has been drastically reduced. Good Hunting!
(Topic ID: 227956)
Dunakeszi
