Maybe the belt is broken, if you take out the surface is not turning, and then take out the barrel to manually try to see if the shaft and knife rotation is normal, are not a problem on the dismantling of the belt to see if the belt is broken, if it is a belt on the Internet to replace the 0K
Motor clogging, or the motor long time not used, according to the lack of rotor oil, the motor is generally burned out is rare, so it is best to get the repair service there, if they If you have knowledge of electricity, you can check the line to see if the power cord is off, if not, in the case of unplugging the power supply in the motor rotor drops of lubricating oil, and then rotate the rotor
Opened, you listen to the sound of any sound, if there is, you open the back cover, to see if it is not a problem with the linkage.
There may be a problem with the motor, or the power connector may be bad.