Replaced the motor that turns the glass turntable. as easy aS CHANGING A LIGHT BULB.remove screws holding bottom cover on microwave ,there is a 21 volt motor with 2 wires attached to it .unplug, remove 2 screws that hold motor in place.if the shaft is "d"shaped, insert motor to line up shaft. turn motor to align screw holes,tighten screws,plug in motor,replace bottom cover ,and your done