Lewis S Fayetteville , AR July 19, 2016 Appliance: LG Microwave Oven LMV1680ST Lg Microwave/Hood Combo Lmv1680st: Lg microwave model lmv1680st stopped heating and the turntable stopped turning. How to replace Microwave Door Switch. Search Internet and the the door switches were likely the problem. Took it apart and tested the switches and found two of them to be bad. Ordered them from appliance parts pro and received them the very next day using standard delivery. ~$15 total and fixed. 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes