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If both the turntable doesn't move and the microwave isn't heating, this means that one of your 3 door switches has failed or you have a faulty main display control board that thinks one of the switches has failed even though it hasn't. You'll need to remove the vent panel above the door, then the control panel to access the door switches. Below is a video on how to test the door switches and if one of them doesn't work, then replace it. If they all test good---you need to replace the display board.
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