Tom L Inverness , FL February 19, 2022 Appliance: LG Microwave LMHM2017ST/00 Lg Microwave Lmhm2017st/00: The microwave light would come on but it wouldn’t heat. How to replace Board Assembly,Latch. I ordered the latch board assembly and some interlock switches from AppliancePartsPros.com. It arrived in a very short time. I replaced the old parts and now my LG microwave runs like it did when it was new. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes