Have you tried the obvious stuff, like reseated ROMs and connectors?

Your +5 volt line is dropping, which is causeing the sound card to reset. The sound board is very sensitive to voltage drops. try re-seating all the 5 volt line connectors.

First time poster, long time collector of machines. Currently have over 500 arcade and pinball and redemption games. Found this issue to be exactly the same as mine. Did you fix the issue, or did I just buy your old game from Captains? Either way mine is doing the exact same thing , randomly repeating "No payn no game" over and over again and pretty much killing the music and making the machine annoying as can be. I will try the above mentioned reseating repair in the 5v line and will report back.

Hi Edde ! My TFTC was doing the same thing a few weeks ago and i found that all 3 battery AA were almost dead ( even one was leaking) ... put new one and it solve my problem.
Sorry for de delay...