Shad F Cumming , GA August 01, 2015 Microwave turn table and magnatron was not working Looked on Youtube to diagnose problem and sure enough figured out it was a faulty interlock switch. We were thinking of spending another $200 on a new microwave but only spent $5 on a new switch and $10 on a multimeter to determine which switch was faulty. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes