My microwave oven worked two hours ago. Now it is not getting power. The clock/timer does not light up, no controls work or beep. The problem is not the outlet or the electrical circuit, which is working with other devices when tested. The power cord is not damaged. Does this unit have a fuse that can be changed or what else may be wrong with it. I do pretty much all my cooking in this microwave. MW8987B serial number 20711481KG