Problem of my old Powerbook G4

Try these links.

http://www.airportcardsdirect.com/oraica.html

http://www.amazon.com/s/?ie=UTF8&keywords=g4+airport+card&tag=googhydr-20&index= aps&hvadid=25180097311&hvpos=1s1&hvexid=&hvnetw=g&hvrand=830038757339670469&hvpo ne=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_66z07os7mf_b

http://www.ebay.com/sch/i.html?_nkw=airport%20card%20apple%20g4&clk_rvr_id=50136 9637522&adpos=1s3&MT_ID=69&crlp=17972959355_2416792&device=c&geo_id=10232&keywor d=airport+card+apple+g4&crdt=0

http://www.dvwarehouse.com/Wireless-Airport-for-PowerBook-c-5347.html&pltid=f5ab 23e65c986bc46c978b980006a148

Hello and welcome to the support community

We need more details on what is wrong with your powerbook. For example you can't connect to a wireless network as you get an error or the airport doesn't show active. The problem may not be with your airport card but any number of things like software or the antenna.

If you want to trouble shoot the issue here are some links to tips.

http://www.wifi.com/community/apple-computers/t-top-10-airport-troubleshooting-t ips-984.html

http://www.apple.com/support/airport/

http://support.apple.com/kb/HT1145

http://support.apple.com/kb/HT4628?viewlocale=en_US