Quoted from PW79:
Bad CPU board from what I've heard.
A local fella here nicely warned me there's a component on the new (or some new?) CPU boards that Stern is aware of which can fail. Rebooting the game x amount of times will get it to work but the next time you boot it up you're back to square one.
If I were you I'd reach out to Stern asap. Best of luck
Yep, exactly what happened to me. It would work sometimes if I left the power off for 5+ minutes and then powered back on. Eventually the sound would go out. Stern sent me a new CPU board and all is good now. Well except for the blown power supply that Im waiting for now.