Internet Connect Not On Leopard

I recently bought an iMac G4 on eBay and am having problems getting the Airport Extreme card to connect to any network. It came with 10.5.1 installed and I've updated it to Leopard 10.5. ...

Since then, I have tried to reinstall Leopard 5 or 6 times from a retail copy. Guys at the 'Genius' Bar tell me I'm just paranoid, but I think something is up. ...

and two Wintel PCs had no trouble connecting at all. The symptoms included not seeing the LAN at all, or when seeing the LAN, connecting to it resulted in many timeout failures. ...

This error is completely irrelevant to my Internet connection status, and I've learned that this Internet Connect app doesn't even exist in Leopard. ...

Previously, I could share my internet connection from my Tiger machine to my Leopard machine. Now it seems not to work. ...

Previously, I could share my internet connection from my Tiger machine to my Leopard machine. Now it seems not to work. ...

Saw on googling that a post with this title has already been posted but on searching forum couldn't find it. ...

My PC is connected to a modem router by ethernet cable, whilst my Mac is connect to the internet through Airport. ...

I was running tiger on my old ibook G3, and I set my bluetooth to look to my phone for an internet connect while I was in spots where wifi wasn't available. Super easy! ...

He's owns a MacBook Pro, earlier today he was able to surf web pages just fine, after playing a game on History.com his internet connection became very slow. Now some web pages will not load at all. Select few will load but it takes awhile for it to load the entire page. ...