Just brought home a Super Mario that is started doing the same thing. When I fired up the first few plays, everything was working great. The next few plays, the background music started to slow and sound like someone was messing with it on a record player. Now I just get Mario saying "I'm SUPER now." and that's it. I'm a newbie to the hobby - this is my first table - is anyone available to hold my hand and walk me through this?

Just a follow-up on this in case anyone else has issues with System 3 sound boards. I ended up ordering a new main sound board. Hooked it up and was getting cymbals and the drum beats but no sound or speech. Pulled the 20-pin ribbon cable that runs between the two sound boards and found that the pins were horribly mangled. I tried straightening them up the best I could, plugged it back in and got full music, but no speech or sound effects. The Aux sound board would not even boot up (no LED). Replaced that ribbon cable with a new one from K's Arcade, plugged it in, and now I have full sound and speech!