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Why no airport extreme detected?

My MacBook Pro 15" core dual cannot detect the airport extreme hardware. I had swap a new hard disk and installed Leopard OS but still no detection of hardware. Is it an airport extreme card failure and need replacement?

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Before spending money, I would open it up to make sure the card is fully seated, etc.

Also, I have had problems with machines containing the non-updated 10.5.0 not seeing Airport cards. When then happens, I've had to plug into the Internet via an ethernet cable, update the machine to 10.5.8, at which point the Airport became visible. Hopefully this is what you're experiencing.

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After verifying that the AirPort Extreme card is firmly seated AND its wireless antenna connected is attached, give the following steps, in order, a try. Stop if a steps resolves the problem.

 

Step 1

• Open a Terminal session. The Terminal application is located in /Applications/Utilities.

• At the command prompt, enter: ifconfig -a

• Locate the network interface that is giving you trouble. (Note: en1 = AirPort)

• Look to see if Terminal indicates the problematic interface is not enabled. (Note: Enabled = flags: UP, status: active)

• If not enabled, enter: sudo ifconfig en1 inet up

• At the command prompt, enter: ifconfig -a

• Verify that the problematic interface is now active and various network interface related data should now be listed.

Step 2

• In Finder, go to /Macintosh HD/Library/Preferences/SystemConfiguration

• Move (not copy) the preferences.plist file to the OS X desktop.

• Restart the computer.

• Verify if you have connectivity. If not, go to the next step.

Step 3

• In Finder, go to /Macintosh HD/Library/Preferences/SystemConfiguration

• Move (not copy) the NetworkInterfaces.plist & com.apple.airport.preferences.plist files to the OS X desktop.

• Restart the computer.

• Verify that you have connectivity. If not , go to the next step.

Step 4

• In Finder, go to /Macintosh HD/Library/Preferences/SystemConfiguration

• Move (not copy) the entire SystemConfiguration folder to the OS X desktop.

• Restart the computer.

Verify that you have connectivity.

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