Airport is Connected, But Internet Doesn't Work

Hey guys. I have a 17" PowerBook G4 running Tiger. My problem is with Airport. I can't seem to connect to any network. What's strange is, I have a full signal, Open Internet Connect shows that I am connected. Everything seems ok. I can use ethernet to connect to the internet. I know that it is an issue with the computer because I can't connect to any networks, I've tried about 4 times. I've tried network diagnostics and assistant, nothing works. Any ideas?

if ur connecting to a home modem-router(not someone elses), id suggest turning off any other computers attached to the modem or router network, and then turn off ur powerbook, unplug ur router and unplug ur modem and leave for 2 minutes, then turn modem on-wait 1 minute-turn router on-wait 1 minute-turn powerbook on and try to connect

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Hi, KK93.
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http://support.apple.com/kb/HT4628
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Hi, KK93.
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Sorry, this is my first time doing this ^^;
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Hi JaschaW,
Can you try to update me with more specific details. The only idea I can think of now, is for you to :
1) Open System Preferences>Network.
2) Click on Airport, go to TCP/IP.....check if there's any setting being set to Manual on the IP address part.
OR you can try doing this....
Shut down your mac.
Switch it on back......now quickly press the Apple Key + the "S" key. Hold it there, until a black screen is prompted. It will prompt you to type a command, in order for you to proceed to boot normally. Do that....after that another prompt....type "exit" without the inverted comma.
Try that....let me know if it works....
Cheers
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Airport is Connected, But Internet Doesn't Work

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