I have an XP Sp2 that has developed a problem. There is no connectivity. Going into the device manager it showed that the NIC was not working. Wouldn't let me update the driver. Looking at connections there was nothing listed so I couldn't repair it or anything else.
ipconfig just shows media disconnected. Pinging the loopback address is sucessful.
So I figured the on-board nic had gone bad. I disabled it in bios and installed a new PCI nic. Same thing. I reset the TCP/IP Stack and the winsock stack. Same problem.
This is a known good connection and a known good cable.