The last few times i have tried to power up my moon patrol, i get a loud hum in the speakers and 'led 1' on the ps board doesn't lite up. Game also does not boot. If i unplug the edge connector from the pcb and turn on the game, all 3 led's lite up on the ps board. I now have 2 separate mp boardsets and the same happens with either set in the game. I replaced the 15-pin connector that goes to the ps board and the ps board was rebuilt by yellow dog. Any ideas before i pull the trigger on a switcher? 

