Did you check the audio fuses in your AV board with the DMM? Also, your MM uses the same AV board as the TOTAN. You can swap the TOTAN AV board into the MM (and swap the sound roms) and see if there is sound in MM.

The pinwiki suggestions aren't going to be very helpful when the machine is not resetting. So for now debug the sound issue. Swapping Rom chips just requires popping them out carefully with a flat blade screw driver. Be careful to not bend the pins or put them in backwards or mix up the order. Did you check the fuses yet with a meter?

I would still swap the av board around with MM if it were me. the guy that talked you through the dmm work could talk you through the av board and rom swap. As long as the roms all go into the same sockets you pull them out of and in the same orientation, there should be nothing to worry about. I guess I'd try the Totan av board in the mm with the mm roms first. I swap boards often to narrow down issues. For me it's way faster than metering every schematic. Once the problematic board is found, then it's time to tear into the schematics.

Anyways, I wouldn't send the av boards off for repair without that test. If it works great in MM then it's fine. It could even be your roms.

Burn marks don't necessarily mean anything. Did you keep the roms and label them? A new rottendog board won't do anything without the rom chips. Without doing the tests, you may have sent your board off for nothing. . That was the purpose of all the tests I kept trying to get you to run.

Awesome. Please update the thread after you install the board back into the system.