Brand New iMac 24" 2.8 GHz Intel 2 Core Extreme 500 GB Hard Drive Issues

Question

Had a 2 week old iMac 20" 2.4 GHz 320 GB hard drive that I purchased from the Apple Store online on 12/09/07. Got delivered to me on 12/13/07. After 7 calls (on 7 different days) to Apple Care Support, my iMac could not get onto the internet network in my apartment.
Had Apple swap my unit and I got the top of the line model out there now, the iMac 24" 2.8 GHz Intel 2 Core Duo Extreme with 500 GB hard drive. Still, can't connect to the internet.
I've got Time Warner Cable as my internet service provider (High Speed Internet Access). I'm using a brand new Airport Extreme as my base station in the living room, and a brand new (all exchanged through AppleCare) Airport Express which I'm using to extend the network as a bridge.
My new iMac is in the study den in my apartment, and my MacBook Pro gets signal from anywhere in the apartment, but when I use the iMac, and click on my secure network using the WPA2 passcode that I set up, the iMac tries to connect, and says "Connection Time Out" and then "Connection Fail."
I've read posts throughout these forums saying that there are issues with the new aluminum iMacs that came out.
I'm running Leopard 10.5.1 on both machines right now, and even with the swap from the 20" to the 24", I still have the same problems.
Gonna have to make another angry call to AppleCare Support tonight to see if I can get this thing resolved.
Anyone else have any other suggestions to getting this fixed for my iMac?
What about using a different router besides the Apple Extreme or Airport Express? Any ideas?
Thanks

Answer 1

ok try this with your MAC BOOK PRO
Go to your system preferences go to the apple icon and then hit system preferences. From section where it says Internet & Network, there you should see an icon folder that says Sharing, In tiger its like that I don´t know how it is in Leopard, but if it is the same we are in luck. Ok Go to sharing and in sharing go to airport option in airport option make a 128 bit wep key and make a sick *** long password hit ok. Now go check the box that says Airport and then hit the start button to start using your MAC BOOK PRO as a router. Now go to your sick *** I wish I had your 24 inch Imac and here I am stuck with my old Imac early intel, and hit the airport extreme icon oh by the way you should also enable your MAC BOOK PRO airport extreme which now it is a WIFI Router trasmitter I Hope I was of any help