It's the power supply, simple and easy fix. An MPC board won't "fry" that easy to my knowlege. But the slightest mishaps can blow the power supply. I'm not sure it's a "fuse", because i took it to a shop. But I had mine fixed for like $30 and it was done in like 2 hours. Any repair shop can fix it.
I'd suggest taking it in for repair unless you know what you're doing.
EDIT: On second thought, I think it was a "fuse", it's little tubes inside, if one of yours looks like a burnt out bulb, you got the same issue I had. Those most likely are fuses(I build computers, not MPCs, lol).