Hi. I am running a 125GHz 17" flat screen G4 Power PC.( with the round base) It has an Airport Extreme card installed (M8881LL/A) but it doesn't always make a good wireless connection to the Airport Base Station which is only in the next room. Can airport cards go bad? And would I have to buy the same model (M8881LL/A) or is there an Apple website that can give me alternative cards to buy.........Thanks folks.........Dean M