Greetings, I have a PowerBook G4 1.33GHZ with stock memory. It is relatively new (a month old or so). The problem is with my Airport Extreme card. It was also factory installed. The other day after restarting, it was no longer recognized by the OS. I have restarted several times, tried reseating the card, and tried resetting the PRAM. I have not yet reset the PMU, but I might as a last resort. Any ideas?