On my linksys wrt54g router, my iphone picks up wifi signal, but my computer which is connected directly to the router wont go on the internet I keep getting the check your connection message. When I connect directly to my modem it works, And back to the router, still just the wifi.....help please.....anyone?
The router sounds like it is failing. Since you know that its not the nic on your computer is seems as though there is a problem with the switch ports. Export a backup of your routers setting and then try resetting it to factory default settings. If you still get the issues then I would try a new router.