How to Troubleshoot & Replace Whirlpool AP4135653 / D8547912 Capacitor

I have a Jenn-Air microwave that didn't turn on and had no lights. It just stopped working completely. I unplugged the unit and had to remove the rear cover using a *security screw kit* that prevents people from opening the rear panel. Once opened, I removed the fuse and testing it with an OHM reader to determine that the fuse went bad. But I also had to determine why the fuse blew and noticed a sticky oily substance under the Capacitor. I used a rubber glove and needle nose pliers to remove the leads to the capacitor and then used the rubber glove and 2 screw drivers to see if the Capacitor was still holding a charge by shorting it and it wasn't. So I ordered a replacement capacitor and fuse. Once installed, I assembled the microwave and turned it on and it worked perfectly. I recommend being very caution when working with the capacitor because I read online that it could hold a very powerful charge, even though it was unplugged. So I was careful to use rubber gloves and tried shorting it to discharge the capacitor before working on the microwave. 

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. 

I got my son to fix it, I`am happy and my wife is really happy, thinks. 

After removing the unit from a wall cabinet, dismantling cover plate (tamper resistant T15 Torx required for 2 rear panel screws), I found the fuse blown when measured with ohm meter. Additionally, I noticed that there was a small amount of fluid leakage on the bottom plate under the high voltage capacitor. After ensuring that the capacitor was fully discharged, an ohm meter was again used to test the capacitor finding it shorted. A new part was ordered by 2:00p that afternoon. AppliancePartsPros shipped a replacement immediately and it was at my front door by 10:30a the next day!!! Outstanding responsiveness. The new capacitor was inserted in the microwave. A 20 amp fuse was inserted. The cover was then reinstalled on the microwave. After powering up the unit, everything worked as designed. In closing, outstanding help with a replacement high voltage capacitor received in less than 24 hours from ApplancePartsPros. Way to go guys!!!! 

Troubleshooted panel brkr ok. Oven still dead. Opened cover & chk. Blown fuse. Went bought from radioshack 20a fuse & blow fuse again. Used ohm meter to chk short circuit found high voltage capacitor is shorted on high volt transformer side. Shop around online app has it. Ordered one Instal ordered parts & retest w/ ohm meter chk ok Plug it in working fine.(: fix.