Robert P Sunset Valley , TX April 24, 2016 Appliance: Model 721.67903601 Kenmore elite microwave/convection light bulb expired : I have replaced one before. Unplug the microwave. The case must be removed. Must be careful to remove all case screws and do not bend or tweak the case. The bulb is located top right as you face the microwave. The bulb assembly is held in with one screw. Easy to remove. Do not touch any other part. Install the new one. Install the case. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes