Do all your sounds work in coil test?

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?

Which jumpers were those?

There are many jumpers on the sound board that could affect things. can you check all the jumpers (W1, W2, etc) against the diagram in the manual? How do you have your dip switches set?

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

I thought sys 7 only had them in the switch matrix?

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 said the only difference is the switch matrix 0 ohm links replacing the resistors ... i have to wonder if what you had was simply a faulty driver board ( pia probably) and the second "system 6" one was just one that worked?

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

ive got a gorgar coming in with the same problem ( in its case no heartbeat) .. will let you know what caused it when it arrives and i find out myself.

System 7 doesn't use the driver board for sound

Dip switches?

FYI in my case with gorgar the board needed a new 7442, a new cpu and one of the input gates as well.. the cpu was still capable of "press the test switch" demo but no longer understood inputs. no idea what caused it but it was ultimately a cpu issue with the 6808.