The light in my microwave went out. how do i replace the light bulb?

You'll have to remove the oven from its cavity, remove the rear panel and access the light bulb socket from there.

What is the make and model of the microwave

YES. IT'S USUALLY FAIRLY SIMPLE. jUST REMOVE THE COVER OVER THE LIGHT AND SCREW IN A NEW BULB.

In this case, you have to check the control panel. There might be wire connections and contacts that loosens. The bulbs inside the oven is connected to a switch that that only functions once the oven is in closed position.

Replacing the cavity light requires taking off the outer wrapper to access the bulb. Nothing easy or magical just an exercise in patience.
Eric

See if I get what you are saying.Sounds like the light switch is bad.That would be the first thing I would check.

The part that controls that is goes through your control panel on your microwave. For the lights to come on to start with the door being closed switches have to be working right and when you press start the lights come one. When the microwave is through cooking and you open then close the door then the lights should go out. The logic IC on the control panel board that detects all these events is not being reset correctly. Unless you get a microwave tech to track down the component on the control panel circuit board it is not something that you could do on your own since it takes voltage and signal checks with the proper equipment and then some soldering and desoldering of the defective component(s). Good luck and God bless.

The bulbs are glued in at the factory. Unplug the microwave and see if you can remove the base of the bulb from the socket with needle nose pliers. You may have to twist the heck out of the bulb base but it should come out. If you do need a new socket it is available at www.geappliances.com under parts and accessories. Or call 1-800-626-2002 for GE factory parts

The controller needs to be repaired. We regularly repair these control board assemblies for only $32.50 nationwide, and that's much cheaper than replacing the board. For safety, disassembly and other info see http://tinyurl.com/yzjozk