I have had issues where the driver board jumpers are not set correctly. This will give the wrong or no background sound even though they all work in coil test.

1) Was this driver board the original board and worked ok with this one in the past?

2) Do you have another driver board you can swap and see if the problem continues?

The jumpers are used on the System 7 driver boards. Just make sure you are using a system 6 driver board. This is a mute issue though if it worked in the past with this driver board

Mike V

Yeah. I don't think they specifically have anything to do with the background sound but I had the wrong driver board in a Blackout and it was having the exact problems. It also had the wrong sounds on different switches. I found a system 6 driver board and that fixed it.

Although if this driver board worked fine in the past then this is not your problem

Mike V

I would have thought that too but the other system 7 one I tried did exactly the same thing. It was odd as it just choose the wrong sounds and no background sound. All sounds worked in the switch test and the game played fine. Speech worked fine too.

I've noticed the new combo reproduction board is having issue with sound for system 7 games and now doesnt support it.

I think there is something else different in the System 7 for sound.

Mike V