Answer Hello David. First thing to check for is a bad door switch on the unit. If the door switch is bad, it will prevent the unit from coming on and running properly. If the switches are good, then replace the main board on the unit. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Monday, April 14, 2014