Edit: unless it is a single port router that goes to a switch.. then you have a switch port failure, but exactly the same thing.
kiwis:Jase2985: Ive noticed lately a lot of the threads where you have had issues lack a lot of helpful details to allow others to be able to help you.
maybe take the time to write up a well thought out detailed post with information on every piece of equipment involved, brand model number how its connected, draw a diagram if needed, or take photos and post them up.
will save countless questions and people left to guess what you are tying to explain or what's wrong.
As helpful as that post.
This started when I thought it as my new motherboard.. testing and questions on other forums lead to where I am now. Thanks for your 2 cents worth though