Airport card no longer detected

My Powermac G5 (dual 2.0 ghz, summer of 2005) has been running on my wireless network without a hitch until recently when it randomly stopped recognizing my Airport Extreme card after I restarted it following a software update. The card's installed correctly, but the computer just completely fails to recognize it. I'm really mystified, if anyone has any ideas it would be greatly appreciated. Thanks!

drewbwhite, I'll offer three suggestions.
1. Check the T shaped airport antenna on the back of your G5.
2. Reseat the card.
3. Do a PMU and nvram reset. Instructions here:
http://www.macosg.com/group/viewtopic.php?t=5819

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