Likely causes:
- If the motor hums or makes straining noises then the cutters may be blocked/ jammed. Clear the blockage.
- If the motor makes ‘happy motor running’ noises but the cutters don’t move then one of the plastic drive cogs may be damaged. Not economically repairable
- If the motor makes no sound then there are many, uncommon, possibilities including fuse, cable, switch, or burnt out motor. Bring it in