I had the micro for about 5 years and it worked fine then the turn motor broke and i changed it and broke again. it seems to have a burn or discoloring on the broken shaft. I would like to know why it broke again after only a few weeks of service.
You will want to check the motor to make sure that it is not getting overvoltage or undervoltage which either could cause the turntable motor to burn out. Would most likely be a overvoltage issue. This would be caused by the control board.