MacBook Pro Airport  switches off

Hi
Had my new 2.53GHZ Intel Core 2 Duo for a few months now and today for the first time my built in airport card, switched itself off.
When I went to Network Settings and clicked turn airport on, nothing happened.
So I then restarted and the start up wheel froze mid spin, so I took out battery and restarted all back up and running, later today the same problem occurred again.
Just to check it wasn't a broadband router Issue I switched on my old macbook pro, and the airport worked fine and connected me to the internet.
Any Ideas I have just updated the OS to 10.5.7 yesterday I think.

Same happens to me. I suspect it happens most often when my system is hot/warm.
MacBook Pro 17, 10.5.7 9J61, 2.6GHZ, 4GB.
The airport suddenly stops working. Sometimes the network preferences dialog wont open. Other times it will open, but I can never start the airport.
Othertimes, the system simply freezes, nothing will move. I've had this happen three times in a row, with me rebooting each time.
So I took my Mac to a service center. The guy ran Tech Tools Deluxe and it reported bad volume links (or something or another), so he re-installed the OS.
When I got it home, I restored via my Time Machine, but the mac is freezing or the airport is turning off now after five days of trouble free operation. The disk tests are clean. So the bad volume info on the disk was due to me restarting my computer, not the root cause.
So I'm going to have to run my system back to the service center.

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                dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f9ee60000
                dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f9edb8000
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    Mac OS version:
    12C60
    Kernel version:
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    Kernel slide:     0x000000001d800000
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    System model name: MacBookPro6,2 (Mac-F22586C8)
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    Thommy

    Hi,
    called to the apple hotline and got informed that the so called "residual current" is normal at the MAC Pro. Sometimes the USB Ports sometimes the FireWire Ports keep been powered continously even the machine is switched off.
    Apple told me further that I can use a connection plug board with a central switch to solve my issue.
    I will close now the subject! Thanks veryone for all your help here!
    Thommy

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