Hi! I too am having issues with the RealTek LAN Adapter / NIC on the Intel DG41TY mainboard. I have built five (5) of these systems so far and every single one of them has issues with the NIC. I experience the following issues:
Frequent limited or no connectivity
Frequent failure to pull an IP address from a DHCP server
Frequent "media disconnected" with no visible indicator lights on the back of the board signifying the NIC has completely shut down / lost power
Any body find a real solution to this issue? I tried disabling "Green Ethernet" and other power saving features with no luck.
I just recently purchased a BG41TY board for the first time (Have used a DG43NG also) and have just started experiencing what I found to be an actual hardware failure. The system see the lan adapter, says everything is working right but plugging the cable in it does not register network connection.. no lights, just dead (cable to another puter works fine so it's not the lan itself)
Tried the Bios update, uninstall and re-install the drivers ect and nothing.
Installed a 15 year old 3Com 10/100 adapter card in the PCI slot and all works well so it's not a winsock or XP issue.
Looks like this board goes back for a trade in..