James J Saint Cloud , MN June 06, 2015 Appliance: LG Microwave Oven LRM1260SW Lg Countertop Microwave Lrm1260sw: My lg microwave is about 8 years old start button broke. How to replace Button. New part simply fit into space and all three tabs snapped into their slots. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes