Microwave ovens are a testament to man's ingenuity and creativity. For someone to have the foresight to imagine that food can be cooked without ever being placed in an oven or near a fire is astonishing. The microwave oven is a marvel of science, available right in our kitchens.
So, you're here because your microwave oven isn't working as well as it used to or it isn't working at all. Many times, you can quickly and inexpensively fix the problem by yourself. You will need to have a volt-ohm meter, which you can pick up at most hardware centers. A notebook to record your process is a valuable assistant when it comes to trying to remember which screw goes where. As always, unplug the appliance before troubleshooting unless otherwise noted. Now, let's see if we can fix that problem.