Where can I find the airport card in my 17 MBP 6,1 (model #a1297)? I need to replace it. Or is this one of the models that is integrated into the screen and I would have to replace the screen as well? If so, can I at least see if the cables to the airport card are loose, to tighten them? About one in 15 startups, I get "Airport Card not found" and then I push my hand on the bottom of the case all around, and wifi works fine, until the next time I see "Airport card not found". Thanks!