Where did the giant remote control go?
I was just watching that again and it strikes me as rather odd, but what did they do with that huge remote control thing they had at the start of the movie. Surely they could have found that opened the big door and shut down the radiation around the machine as it had buttons to do that... And also extend the bridge to walk to the computer.
Then all they'd have to do is find the central processor and use sledgehammers.