Hey delga,
Drive motor armature has open curcuit. You can check continuity accross a1 and a2 with power off. 9 times out of ten, its the motor brushes. If not check power cables to motor, if you check resistance you will see it is open curcuit, again its prob worn or stuck motor brushes
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.