First I would double check for power at the wire nut connections from the black and white wires and not just to black and ground. I've run into cases where there was a bad common [white wire] but 120V from black to ground. Next I would check for power at the switches and/or the fuse. If you have power going through the fuse I would say that your main board is bad. To double check that you can do a continuity check on the display board according to the tech sheet. The majority of the time it's the main board because even if the display board is bad it will light up. One other check that you can try is to disconnect the display board ribbon connector from the main board [tape the connectors as a precaution] and reassemble. Turn the power "back" on and see it the d/w powers up. If it does the display board is bad. On some models [I can't name them all] if the main board detects a failure in the display board it shuts everything down. With the display board disconnected the main board will go into a cancel.
Just a few suggestions. I hope they help. [/color]