This is an over the stove top mounted microwave. It has a light inside which works fine when the door is opened and the microwave itself works fine also. There are two lights in the bottom of the unit which light the surface of the stovetop under the unit. There is also an exhasut fan which exhausts steam etc. from the stovetop from under the unit. These are the problem. There are 2 seperate switches on the bottom of touch pad, 1 for the 2 lights & 1 for the exhaust fan. Both switches beep when touched, but the lights do not come on and the fan does not operate. I have replaced one of the bulbs and the other works, so I am confident it is not that. I can't help but wonder if there is a connection between the 2 ( a common fuse or wire) that would account for only these 2 functions not working. It is less likely that it is 2 seperate problems. Thanks,John