Airport Card no longer recognized by PowerBook

I always take my PowerBook G4 to class with me for the purpose of taking notes during class. I was connected to the internet there, over the wireless network (on campus) with no problem.
When I got back home, my PowerBook wasn't seeing the wireless network (at home, seperate from the wireless network on campus), but I knew it was working because my iMac is connected to it just fine, along with two other computers in my house. I tried restarting a couple of times, and actually typing the name of the network into the Airport drop-down menu. This all did nothing, as did repairing the disk permissions.
I find it very unlikely that the card is not seated correctly, because first of all, when I brought the PowerBook back from campus (when it was working properly) it was tranported in my TUMI bag, which has a dedicated padded holder for PowerBooks, and then immediately took it out and sat it on my desk next to my iMac only to find the PowerBook no longer seeing the wireless signal.
And at this point, I could still turn Airport on and off, and I restarted the computer a couple of times to see if it would pick up the signal, all the while Airport was still recognized by the system (I could still turn it off and on from the drop-down menu, but no wireless networks were present).
So, I popped in my OS X DVD to boot from it to use the Repair Disk feature. It came up with an error that said something to the tune of "incorrect number of threads." It repaired the disk without any probems, or so I thought (and so it thought).
Now, the computer wouldl not function because it runs into a kernal panic, forcing me to hard shut-down the computer. It happened everytime, sometimes during startup, sometimes not until I got into OS X, but always soon after the OS starts.
I then booted the computer as a "Safe boot" and this seemed to stop the kernal panics, and I shut down the computer and started it again with no panics. There was no longer any recognition of the Airport card, either. Not even through the Airport Setup Assistant. It keeps telling me there is no card installed.
I have tried two seperate cards, as I thought maybe the one went bad, but nothing came of this. I tried zapping the PRAM, booting into Open Firmware to reset to defaults, all leading to nothing. I even went so far as to completely erase the drive and do a clean install of OS X, which now drops my system down to 10.4. NOTHING.
Please, anyone willing to help that would be great, even if you would like to contact me through iChat and we can discuss this over iSight to get to the root of the problem. Screen name is CoreyAtMiamiU.
Sorry about the long post and thanks for taking the time to read it.

This is a user to user discussion area. So it is unpredictable as to when someone with a suggestion will respond to your post. An hour in the middle of a work day isn't a long time.
Since the card is recognized, there isn't anything wrong with that side of the card. If the card isn't receiving a signal, either the RF side of the card has failed, the antenna wire isn't connected properly, or the antenna in the PowerBook has failed.

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