A Peek at the Wellhead

Oil spill: Gulf of Mexico disaster 'growing by the moment'

This article has a nice graphic of the well head including an image taken of the robot submersible of the robot arm doing it's work. I see that there isn't a problem getting up to the well head and its BOP or Blow Out Preventer. So, is the problem electrical with the switches? Or is it a failure of an electronic or mechanical component? Is this something that can be repaired? If not, then why not?