Question : Problem: Powerbook G4 "15 does not find airport network

The ssid is broadcast.  The Macbook network connection sharing is off.  The ip address for the MacBook is assigned by dhcp.

Answer : Problem: Powerbook G4 "15 does not find airport network

Does it find any other wireless networks? If not , my guess is the card needs re-seating or the antenna connection is loose or broken. Does iStumbler detect the network:   http://www.istumbler.net/  ?