Need a little help here. I'm stuck in level 3, the CED tracking station, in D3 Mercenary. I can't figure out how to disable the secondary cooling fan. The previous objective was to disable the ventilation shaft fan, which I did using the large ball.
Here are screen captures of the objective and 3 in game shots leading up to the point where I'm stuck. Hope these twig your memory :)
Thanks for the help!
Your last pic is the one that you need to look at. See that mirror at the bottom? It's showing the fan mechanism you need to destroy. However, you obviously can't get to it, because of the wind in the tunnel. So what can you do? Take a look at the walls of the tunnel...notice how there's two forcefields on the far side and one on the near side? Notice how, if you angle it right, you can deflect laser bolts off the first forcefield and hit the second? Notice that, if you try a little harder, you can get a laser bolt off of all three bolts? Put that together with what the mirror is showing you, and I think you'll figure it out. 
