Suddenly G4 no longer connects to internet

My wireless internet has worked effortlessly for years, but suddenly my G4 decides it can't find it. A few days ago, it started asking for the password which was odd, but now no response. The signal is completely full and all other laptops and computers in the house have NO problem. I have turned Airport on and off, restarted, repaired permissions with Disk Utility, zapped PRAM, rescanned for devices and nothing. I always do all updates, so the G4 is fully updated and runs 10.5.7 What has happened? thanks-

Can you give more details of your G4 (processor speed; OS; RAM, etc)? I don't see a G4 desktop machine listed in your equipment list so some extra info is a good starting place. If it's a PowerBook G4 that's involved, they have separate forum areas, broken down by model. Find your specific version and follow one of these links:
G4 PowerBook Titanium case 15-inch
G4 PowerBook Aluminum case 12-inch
G4 PowerBook Aluminum case 15-inch
G4 PowerBook Aluminum case 17-inch

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