Joe H San Juan Capistrano , CA October 21, 2019 Appliance: LG Microwave LMHM2017ST/00 Lg Microwave Lmhm2017st/00: Microwave would not cook. everything else worked no heat. How to replace Board Assembly,Latch. Followed the instructions on your "fix it" video on how to test for a bad micro-sensor. Wola! found one of the three micro-sensors was faulty. Replaced the whole board Assembly,latch just in case the other micro-sensors were ready to go bad. Ten minutes and I was back to using the microwave. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes