The other post about this opener reminded me of the problem my door's
got. The trolley (I think that's what it is - the metal piece that
slides along the overhead rail as the door moves) is just plain
stuck. When the arm is attached to it, the motor can't budge it. I
can't move it by hand either. It's stuck a couple of inches from the
fully-closed position. How do I unstuck it?
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