Airport Card Turns Itself Off (Macbook OS 10.5.8)

My girlfriend's Macbook has spontaneously begun turning off its airport extreme card. I can turn it back on, but it will only stay active for 30 seconds or so before it shuts itself off again. All of the network settings appear normal and I've tried a few basic troubleshooting things (like removing the battery and holding down the power button).
Any help would be greatly appreciated!

Tynan Granberg wrote:
My girlfriend's Macbook has spontaneously begun turning off its airport extreme card. I can turn it back on, but it will only stay active for 30 seconds or so before it shuts itself off again.
Welcome to Apple's discussion groups.
It might help to reset the connection settings on that Mac using these steps one at a time until it works again:
1) Use the AirPort menu bar item to turn AirPort off, then on again.
2) In the Network panel of System Preferences delete the AirPort item from the left column, then add it back.
3) In the same panel as (2), define a new location and see if you can make that work.
4) In the same panel, select the AirPort connection item, click the "Advanced" button, select the "TCP/IP" tab, then click "Renew DHCP Lease".
5) In the folder /Library/Preferences ( not <yourhomefolder>/Library/Preferences), move the folder SystemConfiguration onto the Desktop, then restart your computer. See if you can now make your AirPort connection work.
They may not help, but they'll only take a couple of minutes to try. Before you try these, note all your network settings, because the latter steps will destroy them.
If that doesn't help, I'd run the diagnostics that came with that Mac. If that still doesn't show you anything, I don't have any more suggestions.

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