Replaced membrane pad. A previous post was spot on with excellent step by step details. Most time-consuming part of the project was removal of the adhesive residue before applying the new pad. Possibly a product like Goo-B-Gone would have done the job but did not have it and was anxious to get the part replaced once it arrived. Speaking of arrival, I was amazed to see the part delivered within 2 days of placing the order. Sure is great to have a working microwave. I made the mistake of ordering the part from another source and the wrong part was sent in the correctly marked box. Appliance Part Pro will be my go-to source for future parts.