The set screw that holds that wheel with the teeth that lock into the band of little slots on the upper globe tightly to the crankshaft coming out of the motor may have gotten loose. The wheel will spin when you have it on without the globe on it, but any weight and it won't turn the globe. If you even put your finger on the spokes, it stops turning, though the shaft is turning and the motor is cranking away.
Not to worry.
Easy peasy, according to the super techs AT the Litter Robot factory and shipping center.
Remove the globe from the base and set the base on your lap. Look at the cog wheel and turn it gently in that slot it is in, looking to one side of it until you see a little black ring on the silver shaft that cog wheel is on. That is the set screw. No, it doesn't look like a screw because it has a hollow top. This is the kind of screw you tighten and loosen with an Allen wrench. That's one of those goofy little shafts of metal, often bent into a Z shape or shaped like an L. Find an Allen wrench that fits in the hole and "righty-tighty"... turn it to the right until the wheel no longer turns easily on the shaft when you push it with your finger with the motor off.
Put the globe back on the base, plug the Litter Robot back in, and turn it on. The light should be yellow or green. Push the left hand button and the LR should cycle for you now.
'You've just fixed your Litter Robot!
NOW< the trick is to put that little Allen wrench where you can remember its location! <G>
Best of luck to you!
