John S Marietta , GA December 29, 2015 Microwave arcing Pried off the old damaged magnetron cover (wife had a little fire in there) and siliconed the new one on. The little plastic rivits hold it in place. Let dry for about 12 hrs. Microwave back in action with no lightning bolts now. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes