Quoted from lint:thanks for the tip. Fuse does not blow when AC not plugged into PS board. Measuring AC voltages at the plug with working fuse:
Pin1: 12.09
Pin2: 12.09
Pin3: GRND
Pin4: 14.57
Pin5: 14.53
Pin6: 37
Pin7: 32.50
so, this must be an issue on the PS board? Info on my work on that is here: https://pinside.com/pinball/forum/topic/rottendog-gps001-repair
Thanks any and all for the help!
Lint I have an aftermarket sys 1 power supply you can borrow in Lodi. PM me if you want to grab it