Player 2 : Follow player 1 and get a portal on the ground (so they’re sitting side-by-side). Now turn around 180 degrees and fire the exit portal on the right-hand slanted wall panel in front of you. Now stay by the ledge for now.
Player 1 : If you've positioned both portals correctly, the laser beam will pass through and hit the power receptor near you, shutting the fan off for good. If not, adjust the height/position of the portals until this is achieved.
Player 2 : Once the fan is permanently switched off, drop the Cube and then set a portal on the lower platform to your right and on the slanted wall panel behind you (directly opposite the giant fan).
Both Players : You both need to pull the switches at the same time to open the doorway, now run up the flight of stairs, locate the disc and put it into the slot to complete the second course!
Welcome back to Aperture Science, a world where your Companion Cube isn't you're only company. Take control of Chell once again in Valve's sequel which takes you on an humorous and puzzling adventure and in our detail-packed guide we'll show you:
How to solve every test chamber first time.
Conquer every co-op chamber with a friend.
Loads of High Definition screenshots and videos showing you the solutions to every single chamber.
High Definition strategy videos for every achievement in the game.
Uncover all of the hidden secrets and Easter eggs.