Steve M Cincinnati , OH October 16, 2016 Appliance: LG Microwave Oven LMV2083ST Lg Microwave Lmv2083st / Asbelga: Microwave not heating. How to replace Microwave Diode. First I checked the diode and suspected it was bad but could not confirm it with my meter. Small price to pay to test. Received the part in 2 days from my order and installed the diode. No help. Finally I removed the Magnetron and found a cracked magnet. Ordered the magnetron and received it the next day. Installed it and problem solved. Spent less than $100 to repair a $300 microwave. I have used AppliancePartsPro many times and have never been dissatisfied. Always the correct part and always a fast delivery. Prices good. Service Great. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes