Donald D Mesa , AZ December 08, 2017 Appliance: Maytag Free Standing Microwave UMC5100ADW Maytag Microwave Umc5100adw: Microwave stopped working display did not light this was microwave above wall oven one unit. How to replace Capacitor. I checked the fuse and found it was bad. I bought a capacitor, but it looked OK so I did not replace.I turned on power and the display turned on and then I heated a glass of water and it works fine. This is my first time I attempted an appliance repair. 22 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes