My obsession with staring an early solid state Bally collection led me to purchase a "fully functioning" Centaur II from out of state and had it shipped to me. I started it up and played a few games without any issues. The next day it blew the F3 fuse before I could play another game and I haven't been able to get it back up and running since. I've read all 14 pages of this thread and watched some YouTube videos, but I'm still a little overwhelmed with how to figure out why the F3 fuse is blowing. I spent a couple hours last night taking all of the plugs off the boards, cleaning them, and reseating them...I know it is hard to tell visually, but everything seemed solid. When I replace the F3 fuse (4A) and turn the game on, everything starts up as normal - 7 green light flashes, lights on, displays on, solenoids fire - then, not too long after the F3 will blow again.
I'd welcome any suggestions with where to start.