Monday 21 May 2018 at 23:13
I had a problem like this and it was driving me nuts. Turned out to be a cracked solder joint at one of the bridges on the rectifier board. I would start by reflowing solder on both the tops and bottoms on all bridge lugs. Unless it's a new REC. PCB.
Source: http://pinside.com/pinball/forum/topic/harlem-globetrotters-rebooting-on-random-coil-activations#post-4410441