Thanks for the reply! I only have a multimeter- no logic analyser or oscilloscope. So far everything is finally checking out in terms of continuity.
Is there anything I can do with what I have?

Hey guys, I was wondering if anyone could give me a hand here? I have a Korg DW-8000 here that I got for next to nothing because it was in poor shape. It made no sound and half of the buttons didn't work. I got it to a point where nearly everything is working, except that now, every note played is t...