Cube airport can't see my network

Hi. I have a Cube that I am trying to get up and running but I can't get the Airport card to see my wireless network. I know the Cube has an airport card installed because when I do a System Profiler I get the following:
Wireless Card Type: AirPort
Wireless Card Locale: USA
Wireless Card Firmware Version: 9.52
Current Wireless Network: wireless network not available
My base station is an Airport Extreme 802.11b/g compatible with security set to "None". It shows up just fine on my other computers but when I look for networks on the Cube it just says "No networks within range". I have tried everything I know to no avail. Any ideas? Thanks in advance.

Hey, never mind. I swapped out the airport card for another one and it worked. Apparently it was a hardware issue with the card itself.

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I am reposting this on this forum as I have not had a response so far. Apologies.
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Thanks for replying to my problem. Since posting my original thread, the Cube's AirPort status bar has re-appeared for no apparent reason on about 4 occasions. Each time I put the Cube to sleep and re-awakened it, the status bar again greyed out each time. This morning after awakening the status bar became visible after a couple of minutes. I immediately checked the DHCP table in my router's software configuration manager. The AirPort card and Ethernet's, MAC and IP addresses were both listed. I left the Cube running for about 20 minutes, put it to sleep, awakened it and the status bar was (is) greyed out once again. Armed with the IP address I tried configuring the TCP/IP settings manually (I entered the IP address displayed by the router for the AirPort card) but unfortunately I am back to square one. I am considering de-fragmenting my drive using TechTool Pro 4 and then rebuilding my directories using DiskWarrior. I have to optimize the drive since DiskWarrior reports that my HD doesn't have enough contiguous space. I have a small 20GB LaCie drive on which I will install TechTool Pro and optimize it from there. I was going to create an e-drive partition, but the program was de-fragging space for the e-drive to occupy and it was taking hours to do it. I hope that optimizing from the LaCie works. If all else fails I will wipe the HD and re-install everything. I don't want to do this but I might not have any choice. I still hope that someone might come up with a solution.
500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)
500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)
500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)

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Forgive me for re-posting this thread. My original title doesn't flag up my problem. Originally posted under 'Airport status bar greyed out.
I have two G4 PowerBooks, a G4 Cube and a PlayStation 3 all connected wirelessly to my BTBOYAGER 2091 router. Yesterday my G4 Cube awoke from sleep and the AirPort status bar appeared greyed out. I was able to re-establish the wireless link a couple of times via Network Diagnostics, but now the AirPort card fails to recognise the router. The other two PowerBooks and the Playstation 3 recognise the router and all work fine. I have tried deleting the SystemConfiguration folder and re-booting, repairing permissions and deleting the router keychain, but nothing restores AirPort or Network settings and let's it 'see' the router. I have the Cube connected to the internet via the ethernet link to the router and I have access to the internet. From Network Diagnostics I get the following report on screen: -
Network Status
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AirPort Settings - red light (Failed)
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ISP - green light
Internet - green light
Server - green light
I have searched through the forums and can't find a thread, so I thought I would post my problem and ask if someone can help me restore my AirPort and Network settings, if indeed that is the problem. I have a screenshot of the Network, Network Diagnostics and AirPort windows showing the problem visually. I can email the screenshot on request.
I would be grateful for any help and hope that I have posted this correctly.
With thanks
Eric Lovat
500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)
500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)

Thanks for replying to my problem. Since posting my original thread, the Cube's AirPort status bar has re-appeared for no apparent reason on about 4 occasions. Each time I put the Cube to sleep and re-awakened it, the status bar again greyed out each time. This morning after awakening the status bar became visible after a couple of minutes. I immediately checked the DHCP table in my router's software configuration manager. The AirPort card and Ethernet's, MAC and IP addresses were both listed. I left the Cube running for about 20 minutes, put it to sleep, awakened it and the status bar was (is) greyed out once again. Armed with the IP address I tried configuring the TCP/IP settings manually (I entered the IP address displayed by the router for the AirPort card) but unfortunately I am back to square one. I am considering de-fragmenting my drive using TechTool Pro 4 and then rebuilding my directories using DiskWarrior. I have to optimize the drive since DiskWarrior reports that my HD doesn't have enough contiguous space. I have a small 20GB LaCie drive on which I will install TechTool Pro and optimize it from there. I was going to create an e-drive partition, but the program was de-fragging space for the e-drive to occupy and it was taking hours to do it. I hope that optimizing from the LaCie works. If all else fails I will wipe the HD and re-install everything. I don't want to do this but I might not have any choice. I still hope that someone might come up with a solution.
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500 Mhz G4 Cube, 1 GB RAM, 40 GB HD, 1.5 Ghz Aluminium PowerBook G4, 1.25 GB RAM, 80 GB HD Mac OS X (10.4.9)
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