The switch is on the "I" position which means on, just double checked manual. Isn't there a little Ethernet LED in the back supposed to be lit even when the computer is off? If so mine is off.
Should be, check all the cables are pluged in, just incase you bumped something, seems funny that you went in and something went. Could be a dead PSU or Mobo, my money would be on the mobo as it is Asrock and hate em.