Some of my Buttons don't work on my microwave

Question

For some odd reason some of the soft buttons on the front panel of the microwave stopped working. * Worked like a charm yesterday and it's in a location w/ no moisture. * I would have to say there's probably 5 to 7 buttons that stopped functioning at the same time. (random buttons and not all by each other) The most important button START/STOP isn't working -_-. I've had this microwave for about a year and use it pretty often. ** added info **The open door button is right below the soft button panel. Maybe too much opening and closing cause something to go lose inside the unit. Thanks for whatever you can provide...