My World Cup was rebooting. Had a friend replace bridge rectifiers, 5 big caps, smaller 100uf cap, and the voltage regulator (kit from Marcos+ regulator).
https://www.marcospecialties.com/pinball-parts/WPC-PDA12697X

Put the board back in, and it buzzed for a sec, then blew Fuse F112 (Solenoid Secondary). CPU board LEDs are off, and Power board L4 and L5 are off too- the +5v and +20v circuits.

I don't seem to have 5v, 50v, 20v, or 18v at the test ports, but I'll have to double check them.

Any idea where to start?

Ha, yeah, thanks. My friend does electrical/hardware for a living, so i trusted him better than my own butterfingers. Caps are all the right direction.

Turns out I'm not getting some voltages from the transformer. I'm getting 55 volts AC on fuse 112. Emmanuel says it expects only 16 but it's also supposed to be a 50-volt DC line. Any ideas?