I was working on a fully working Black Hole that I just finished up repairing. A strand of solder touched the bottom transformer and bridged something else and now the game won't boot. A few coils are stuck on and it won't go into attract mode. All displays are blank and it won't go into test mode. Credit display shows 0. All my voltages seem good on the PS. Slam switch mod has been done. Fuses test good.
At this point, all I have checked on the cpu with a logic probe is A0 and it is stuck low. Not sure where to begin on this one. Any direction to narrow it down? I have the manual and repair guide. Thanks.