Can't boot from install disk, and says no airport card installed, HELP!

I bought a new Macbook Pro a few months ago, which recently had to go in for repair to have the screen changed. It came back with the new screen fitted but they had done a terrible job at aligning the lid, so it went back again. Came back and all looked good, until i booted up and realized that where my wifi icon is at the top of the screen, it wasn't connected. When clicking it to bring down the drop down menu of available wifi spots, all it said was "No Airport Card Installed"....Thinking a repair of disk permissions might be worth trying, I tried to boot from my OSX install disk holding down C, however when holding down C all it does is go on a constant loop of restarting, not even reaching the Apple logo. If I don't hold down C then it simply boots to the desktop, so i'm unable to access disk utility correctly to run a repair.
Being pretty fedup with the whole situation, the laptop has now gone back for a 3rd time, as it never had these two issues before. I was just wondering if anyone had any idea what might have caused this? And how a status of no airport card installed and a drive that wont boot a disk normally can be related?
I'll be getting it back on Tuesday, but i just wanted to know what the heck they might have done to have screwed things up.
Thanks
Phil
Message was edited by: Philip Dexter

Hi Phil,
I can't say for sure, but it sounds to me like they didn't reconnect the WiFi hardware when replacing the screen. To my knowledge, the Airport "hardware" (including the antenna) is located inside the screen hinge. When the screen was replaced (and the hinge not properly aligned) perhaps someone improperly connected the Airport hardware, or forgot to connect it entirely.
The reason the WiFi hardware is located in the hinge is because that is the only plastic area of the entire notebook. Radio signals do not travel well through aluminum, so some area of the computer has to be plastic to allow that signal to get through. The hinge is the only area where that's possible.
As for the reason why the machine wouldn't boot up from the disc, I have no idea. Here's hoping it does when it comes back. If I were you, I'd have a chat with Apple Customer Relations about the situation.
--Travis

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