PMB 1010, I sent mine back to Pansat on a warranty claim. They sent me a new motor to replace the defective one.
I should explain though that my problem was eventually traced to a damaged gear train. It would rotate towards the east limit and then lose gear engagement when it got to the stripped teeth. If you tried to reverse rotation, it wouldn't because it couldn't re-engage the gears again.
If your motor will still rotate - even intermittently - I would think it could be the processor inside of the motor. It's the brain that tells the motor how much, when & where to rotate to. If it loses electrical communication with the receiver for some reason, it gets confused so it shuts itself down. Then it will not rotate at all.
Unplugging the STB from 110V - then restoring power - resets the processor. It supposed to rotate itself back to the south reference position to restore it's sense of position/direction. Sat Control & Pansat Technicians told me that there are some conditions when just unplugging will not reset it. My replacement motor arrived in this state - brain dead.
On Techs advice, I removed the printed circuit board from within the motor housing & reset it. To do so, first disconnect motor coax from receiver power. Look for a small removable cover plate (prox. 1"x3") on the bottom of the motor. Cut the little sticker label that's on one edge of it with a sharp razor knife. Find a flat spring tab on one end of the cover (in the bigger gap) & depress it with a small screw driver to unlatch it. Carefully pry & lift up the cover. On the back, you'll see a small printed circuit board with several wires that are connected to it by a plug/socket connector. Unplug it, let it set for a minute or so then reconnect the plug.
Re-assemble the motor & test for proper operation. If that doesn't do it, then it's time to send it in for warranty service. You can email the
SM3D12 factory at
http://www.sat-control.si/eng/index.htm
Hope this helps.