National Panasonic NN-C781JF Microwave problem | Start switch not function

National Panasonic Microwave NN-C781JF Replacement Microwave Panel NN-C781JFS Membrane Switch Touch Control Button Board Oven Repair Kit Description:  Full function and stable performance  Repair your machine by replacing the membrane panel touch switch  Help to solve the problems that caused by broken or damaged membrane panel, and make your machine work properly  Repair part for most microwave oven Specification:  Model: NN-C781JFS  Size: Approx. 238x77mm (LxW) Package:  1x Microwave Panel Note:  Please recheck the size and buttons of your original panel before making an order.  Professional installation is highly recommended