Airport not working

After the replacement of the display,my airport card is not detecting on the system.The fan making noice and system is too slow .I booted from the external HDD(OSX is installed).same problem is apear.I tried SMC and PRAM rest.But still the problem is existing.Please helpme to overcome from this problem.Please mail me @ : [email protected]

Ziad,
There have been posts in the past of the Airport card
needing to be properly seated. Not clear which pB
you have, but mine is in the battery bay. It
apparently takes some effort to properly seat.
Joe
thank you all for your help, but apparently, I had to replace my airport card...this is only after 1 year and 6 month... how reliable is that.

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