Can't connect to the internet via ethernet cable

I've been having some issues with connecting to the internet via ethernet cord on my college campus and I'm not sure how to fix it. Wireless works fine but as soon as I plug in, I get zero internet access. I've tried several things such as updating my LAN drivers and starting my computer up with limited 3rd party software to see if that was interfering any way, but nothing has worked thus far. I've tried testing the connection with different cables that are known to work on other computers and using different points of access but that doesn't seem to be the problem, either.

When I run diagnostics I get, "the connection between your access point, router, or cable modem and the internet is broken" as a response. I'm starting to think that my NIC is bad, but I'm not completely sure... Any ideas?

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Net adapter

Sounds a little odd. Did you try uninstalling the adapter, then rebooting to see if Windows would reload it? I am guessing that you have already tried this since you did try to update, oft times an uninstall then reboot does the trick, depending of course on the issue(s).

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NIC faulty

Use alcohol & a Q-tip to clean the copper contacts where the cable plugs in. If your computer still does not detect a cable being plugged in, try to clean it again. If you still have no luck to plugging it in directly into a friends DSL or Cable modem. If you still have no luck you will need to get a new NIC here is a USB one i found doing a very quick search. Be sure to get one that is WIN 7 ready or 64bit if that is what you have.

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If wireless is working ...

take a look at the configuration of your ethernet NIC to see that its settings match the network. For instance the router might be configured to assign an address but the card might be configured with a static address for another network.

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