Surface light won't turn off

I changed the halogen bulb in my microwave and must have shorted the surface light switch on the control panel. everything on the microwave works fine but now the surface light will not shut off. what part do i need to fix this problem?

The surface lights operated by the smart board which got damaged due to that short. The correction is to replace the smart board. If you need the correct part number, post the end of the model number.

Gene.

My problem is the same except my bulb flashed out when turning on. I can find no part named “smart board” in the parts list. JVM1950dr1WW. Help please.