Light Bulb

I used the following instructions that I found online:Outer Case Removal 1. Remove screws securing outer case to chassis.
2. Push outer case approximately 1 inch to the back of
the unit, which will free case from front plate.
3. Lift outer case from chassis.
4. Reverse procedures to reinstall.
Lamp Socket Removal ... Read more 1. Remove outer case, see “Outer Case Removal”
procedure.
2. Remove wire leads from lamp socket terminals.
3. Remove screw securing lamp socket to air duct
assembly.
4. Replace and reassemble in reverse order.
For our microwave, removal of the outer case required a nut driver with a special bit to fit a screw with a star shaped head with a pin in the center of the head (tamper-resistant Torx security screw) - not common in most tool boxes. I was lucky enough to have a large assortment of bits and found one to work but I expect many would end up heading to the hardware store. Bulb replacement was easy and obvious as in the instructions above. Replacing the cover took some coordination by two people to insure that the cover fit properly over the flanges around the oven before screwing in place - not difficult but took us a couple of tries to get it properly aligned and on track. I understand that there is the potential for a pretty good electrical shock from the capacitor inside a microwave if you are not careful - this explains the Torx security screws. If you're not a qualified technician you can decide if you want to make this repair. If you do, be careful to contact only the bulb assembly which was not difficult to access. Thanks to whomever provided the original instructions.

Discovered we had to remove the top cover of the microwave and replace the bulb from the top. Difficulty was the microwave and oven are attached and both had to be pulled out of the wall to get to the top of the microwave. The units were heavy.