All the noise and vibrations in a microwave comes from it's cooling fan and the motor that turns/moves the tray. If this is causing the side panel to vibrate then you need to locate where the panel is making contact with other parts of the microwave and place some rubber between those points.ow can you quiet vibration on side panel where magnatron is located, if I put my hand on this location you can feel it vibrate and by applying a little pressure the noise is cut in half, tried square piece of rubber used as seam tape for rubber roofing helped a little but looks ugly (wife).