After the oven went through the self cleaning cycle the control panel went blank and I cannot open the oven door. The oven has power to it. How do I release the door so I can test the control panel?

Look at these: https://dl.dropboxusercontent.com/u/8010163/Whirlpool_Gas_Ovens.zip

Also check this one: https://dl.dropboxusercontent.com/u/8010163/Whirlpool_Slide-in_and_Freestanding_ranges_Electric.pdf
You can hook a bent rod onto latch and release it.