The magnetron on my microwave does not come on when the start button is pushed although the oven light comes on and the timer begins the count down. If you gently pull on the handle the magnetron will come on but may go off when the handle is released. Sometimes is will come on if you push on the door. Would this be a spring problem?

I appreciate the quick response. I have a few questions. Do I not have to remove the microwave from the wall? Do I need to discharge the capacitor? When I removed the front vent grill I saw one screw at the top of the control panel. Should the control panel come loose after removing that screw? I thought I would have to remove the case to access the components but I noticed the capacitor is right above the control panel.

Thanks for your info. I was able to remove all the switches and clean them and the areas around them. Unfortunately the microwave still only works when you slam the door just right. It has blown the fuse twice in the last week. I have ordered a replacement because I think it will eventually fail completely. Hope it works until then. Thanks again for your help.