How do you turn on the power in Zombie mode in Black Ops?

Answer 1

Firstly open the door at the top of the stairs on the right hand side cost 750,

then open the next door heading right 1000,

then you'll head down stairs into a room with 2 flights of stairs going down and a turrent in the middle. directly opposite the turrent is the next door 1250

then run forward to the end then left and there will be one more door for 1250.

Once you open that door, you'll come out into a big open room (the theatre) - run to the opposite side of it and there is a light and a big arrow pointing to the wall where the power button is.

Once you turn on the power obviously you can get the energy boosts and turn on the turrents.