Tomb raider legend [the demon]

[Sir_John]

Hi there,

i have some troubles with the game tomb raider legend.
im on the level where lara meets an ugly demon its a demon of Amanda the friend of lara.
in the game there is a sort like of an electric-machine.

But i really dont know what to do here.
i tried everything

please help me!

Greetings
Sir_john

[Scott croft]

Ok well I will help you if you help me.

[Sir_John]

Sure thing,

but uhm... i've found an walktrough already..
anyway with what can i help you?

[Scott croft]

Do you remember the bit with the train well I'm past that bit I'm in this air vent thing and you jump wires and you shoot a fan. Do you know where I'm talking about?