Non, il cherche la clef de l´ascenseur dans la salle d´apesanteur.
µ
J´ai trouvé un truc en Anglais...(C´est à partir de la salle oùtu débloques les portes rouges)
Go right to the next room, then examine the machine with the red orb. It´ll
unlock a door. Grab the chest in the south end of this place, then return to
the weightless room. You´ll have to make your way to the left exit, where you
originally came in, which is a much easier feat and doesn´t require direction.
Anyway, head down when you come out to reach a previously-blocked chest with
some good armor, then go all the way back to the save point where you first
came in. At the first intersection, head down instead of left.
At the next screen, keep to the right. You´ll eventually run past a chest with
some armor for Raine. Follow the path, and when you go through what looks to
be an airlock ( looks sort of like the tunnel that connects an airplane to the
airport) go left. At the next screen, head left until you go down some stairs.
After that, take the two paths leading down to get a pair of chests, then go up
and left for the blue lock. Disable it, then you´ve got to go all the way back
to the weightless room. I know, it´s a long walk. What you want to do is
return to the previous screen, then at the intersection, go down instead of
right through the tunnel. From there, just follow the original instructions
to the weightless room, because you´ll be back where you started.