Internet Stopped Working Today

But it's only my computer. My mom's laptop -which I am using now- can connect fine via wireless. My computer is hard wired into the router as the modem and router sit next to it.

I tried connecting it to the modem directly - nothing.
I tried using each of my operating systems - Ubuntu11, LinuxMint 10, Debian, OSx10.6 and Windows 7 - and non of them can connect.
I tried running the diagnostics on Windows and OSx and they told me there was no ethernet cable plugged in, or a similar error.

This makes me believe that my ethernet port on my computer has died, but I really wouldn't know. Can Southperry offer any help?

Try a new cable, if not it's the ethernet port.