iMac late 2006
iMac (Late 2006) - Unable to connect to network after reinstall OS x 10.4.
computer is connect but unable to open safari pages
iMac, Mac OS X (10.4)
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.4 instructions...
Is that Interface dragged to the top of Network>Show:>Network Port Configurations.
If using Wifi/Airport...
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
in Network>TCP/IP>DNS Servers:, for that Interface... then add these numbers...
208.67.222.222
208.67.220.220
(There may be better or faster DNS numbers in your area, but these should be a good test).
Click OK.