This guide will teach you how to turn on the Power in the map Classified. Turning on the power is fairly easy and straightforward.
From the spawn room (Conference Room) take a left and open one of the two doors.
This will lead you into the Deserted Hallway, from here go straight ahead and into the elevator.
Take the elevator downstairs and you’ll end up in the War Room: Upper Level.
Go down the first flight of stairs and take a left. You will now be in the War Room: Lower Level.
Make your way into the elevator room with the label “DEFCON _” above it.
Take the elevator down and you will shortly arrive at the Laboratories.
Continue straight and the second door to the left will be where the Power Switch is located.
Interact with the Power Switch and that’s it, power’s activated!
There you have it, that’s how you activate the power in the map Classified!
Here’s a video tutorial if you would like a better visual representation: