Hello. I am experiencing a blown F103 on powerup, which is continous duty 50 volt circuit on a Williams getaway. I noticed this after swapping out bulbs to LEDS. The only thing that seems affected is the ramp magnets. I kept them unplugged, breaking the circuit, and can almost play a normal game. I made the mistake of leaving it powered on so obviously I touched something to something with a socket wrench or fallen bulb. I doubt I pinched a wire on a bulb socket because that wire is nowhere near any socket. The only board underneath that I could have unknowingly messed with is the "ball accelerator board". What is the best method to try to issolate where the problem is( part of that circuit is on the power driver board). BTW the capacitor and bridge rectifier on that path were replaced.

Thanks
Jeff