Sterling S Susanville , CA August 13, 2016 Appliance: Model KENMORE 721XXXXXXX Microwave light burned out Removed Case Cover. Changed bulb. Grounded power plug by reversing extension cord with only ground pin connected. Essential to help ensure large (dangerous) capacitor is discharged. Waited 1/2 hour hoping for power remaining to drain. Wore Rubber gloves for insulation & avoided working near Capacitor & Transformer. Other than the dangers of these electrical components The bulb change was easy enough. Not recommended for anyone who does not understand the dangers of those two components. The case screws are Torx 25 with the security pin (need special bit). Be careful. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes