If you have two sets, one has output one doesn't, what I would do is remove the actuator from one with no output and install in the one that is running bad.
See if that helps get at least one up and running good, then mess with the other issues on the other set.
One connector and two bolts and the actuator is removed.
If that works then you at least will know the actuator may be out of adjustment or bad.
What I don't like what I see is the actuator slams all the way open when the set is started, shouldn't do that.
Also when the set is started, the rod shouldn't come out of the seat either. The black spherical nut on the rod should always be in the seat.
The one that has no output because the PMA isn't putting out enough voltage, may be because the speed is to low.