For this one power on.

Did you try grounding the transistor tab ( jumper wire put one end on metal top of transistor and briefly touch other end to ground ) to be sure wiring from transistor to coil is all good ?

For this one power off - you'll have the board out of the game anyway.

Grab your meter, set to ohms or diode. Two probes three legs, measure outside to middle, other outside to middle, two outsides. Flip probes and repeat - then do the same on a similar transistor nearby and see if readings are the same.

Check out YouTube too, lots of short videos on how to use a meter.

LTG : )

Not familiar with Champion Pub, but would presume there's a switch or mode that triggers the right arm. If there is, test it in switch edge test and test the solenoid in solenoid test.

That doesn't mean voltage is getting to the right arm coil (broken wire between J133-3 and the right arm coil).