No restart on UNO after power down

HazardsMind:
If it is not going back on when you plug the USB back in then it is possible that you fried it. OR you have a possible short somewhere.
Remove all your wire and try the USB again.

Note that he said:

I can go back and reinstall the program and it will start to run again.

That wouldn't be possible if something was 'fried' or 'shorted'.

Lefty