Powering the board from the regulated AC adapter in the back, I get no problems, everything boots up fine. However powering the game from the jamma edge, I smell something burning and I notice a transistor on the bottom of the motherboard had blown. I checked my 12v line on the jamma edge and it's about 12.6v and I notice it's literally going straight from the 12v line to the pico/whatever the atx thing they used, not through a regulator or anything. I tried it 5 more times and the same transistor blew each time. Now there's a problem here. I can't regulate the 12V cause no arcade psu that I know of has a 12v regulator. I took the pcb to another jamma setup, checked the jamma voltage and the 12v was around 12.1, no problems it works fine.