I'm still tracking this down and hope for more input. I have a much similar problem where I have fan, light, and panel power but NO heat. From the YOUtube videos I have been gleaning it seems that either the capacitor, diode, or Magnetron. https://www.youtube.com/watch?v=DlpYQRgD... What I NEED to see/read/know is how to dismantle the Mounted LG microwave properly. Are there any repair manuals anyone has for this?