So I'm just looking for any way to confirm (other than just 'duh it's not working') if the port is dead... this is very strange order of events.. Had Windows 7, figured it was time to reinstall.. so for the heck of it did Windows 8.1 -- everything was fine... I'm not exactly sure at what point but somewhere between installing 8.1 and deciding I didn't want to use 8.1 the LAN port stopped working. I thought "hmm ok" and went ahead and reinstalled Win 7...... still no LAN port. Ethernet is dead. Troubleshooter tells me to plug in an ethernet cable ---- cable is good as I tested it with another computer. Tried a second cable just for kicks, same result. Plugged LAN direct to cable modem (instead of router) and same result. LAN dead. So is there anything I could possibly be missing? Or is the only obvious problem that the LAN port somehow got fried? (NIC is enabled in BIOS, wouldn't have been disabled on it's own anyways). Motherboard is under warranty but what a PITA to RMA for a LAN port. I don't have any ethernet cards hanging around to use but wouldn't want to live with a "broken" mobo anyways. Oh yeah -- and device manager says it's working fine. I've unisntalled/reinstalled the driver as well.