I have an ibook G4 1.42 ghz. It worked fine until recently. After connecting to a wireless network for a few minutes, it then begins to sporadically drop out. And after losing the connection, it can't detect any wireless networks. Turning off the card, restarting the computer, letting it sit for a few minutes... signals come in and out, but then drop again. I'm using OS X.4, so this isn't a software problem, the OS, or caused by an update. The antenna also isn't faulty. The computer reads the card as being fully functional, but just doesn't detect any wireless networks. I've exhausted all software solutions and now can only conclude it's a hardware problem. Given the symptoms I've described, would the best idea be to replace the card altogether? Or is there reason to believe this won't solve anything? Thanks.