Hi everyone, I recently purchased a refurbished AirPort Extreme Card and AirPort antenna for my late 2004 Power Mac G5. My Mac is running on OS X Version 10.4.11. I properly installed them, since the computer notes the AirPort Extreme card in the "About Mac" menu. There are a couple of wireless networks near my home and the computer doesn't detect any of them. I've checked out previous forum discussions around this issue, tried some suggested troubleshooting to no avail. Can I presume the AirPort Extreme card is defective? It detects absolutely no signal from the other networks around here. Could the WEP password length of our router have anything to do with it? Do I need to download a driver to activate the AirPort Extreme Card? Could upgrading to a different operating system make it work? I would appreciate any help, any suggestions. Thank you.