OP

Quoted from mwrussel:

I previously had an issue with my Dr Who where several solenoids/optos were firing causing a weird issue. The playfield moves without knowling location, ball shooter, tardis popper, MPF ball ejects all fire randomly. Last time, everything passed tests and when checking connections, the problem resolved when I removed unplugged and reseated J117. It's now doing the same thing again, but everytime I try to check, fuse F105 blows. Reseating the plug does not fix it this time. A short somewhere? Any help would be appreciated.

OP

Quoted from mwrussel:

I checked the voltages coming into the power driver. I believe I was using the DMM correct by choosing the VAC setting, putting the common on the ground strap attached to the mounting plate and then checked individual pins through the connector. I roughly got half the state VAC for each input. I checked just a few of the outputs as well and they seemed to be spot on.
Here's the input VAC results with expected in ()
J101
pin 1 5.3 (9)
pin 2 5.2 (9)
pin 4 6.7 (13)
pin 6 6.7 (13)
J102
pin 2 8.7 (16)
pin 4 7.9 (16)
pin 6 7.5 (16)
pin 9 7.5 (16)
J104 is VAC output to J901-3
pin 1 31 (50)
pin 2 26 (50)
J112
pin 1 4.6 (9.8)
pin 3 6.8 (9.8)
J115 all pins were supposed to be 6.8VAC, all were approximately 5 VAC
The few VDC outputs checed were as expectred, some higher than expected, 50v outputs at j107 were giving 75V