Weird Networking Issue

AggroChan

Here's the situation. I have a simple home network consisting of a computer and a ps3 in the living room which are connecting to the internet fine wirelessly.
However, in the bedroom there's a computer that our wireless router is plugged into. (wall->router->computer and wireless signal)
This computer usually connects to the internet fine but as of late the connection is lost.
What baffles me though is that the computer and playstation outside still get an internet connection wirelessly through the router while the host computer isn't getting the connection wired. I'm no networking slouch but there must be something I'm overlooking. The computer's not connecting manually (wall to pc)
Anyways, this pc is rather old so i'm guessing the ethernet port blew? can that even happen? Help please!

Thanks in advance!

EDIT: Linksys WRT54GS Router btw.

exoplasm

Could be a loose cable, bad cable, bad port on router, bad port on PC, DNS problem... any multitude of things.

You need to provide more information to narrow it down.

So first of all try this. Open a command prompt (start -> run... -> type "cmd" in the box and press OK/run). Type the following:

cd desktop {press enter}

ipconfig /all > ipconfig.txt {press enter}

Now find ipconfig.txt on your desktop and paste it here. You can sanitize it first if you want, but you can't hide your IP address or it defeats the purpose (it's likely 192.168.x.x range anyway which is private). You can remove anything that isn't part of Local Area Network, sometimes there are extra listings.

While you're at it try some ping tests to see if its just DNS:

ping 4.2.2.2

If that fails try this (replace the numbers with your actual gateway address):

ping 192.168.0.1

Post the results as well.