Mine stopped shredding too. When you put the paper in, it would try to shred it, but it would stop, but you can hear the motor still running. What happened is that, there is a gear that drives a shaft and the gear attaches to the shaft by a squarish hole and the shaft has an end with a squarish fitting and the squarish hole gets stripped and becomes round and just starts free spinning. It can be fixed, but you have to do some filing & drilling. You can drill a hole on the end of the shaft and put in a short pin. On the gear, make corresponding slots, so that the gear fits over the shaft with the new pin.