There are two ethernet ports back of the computer from the mb. When I plug a cable into either ports the system cannot find the connection to the internet modem. I have checked the BIOS to be sure Net ports are on and I have searched for updated drivers with both the mother board cd and the win xp cd in hardware. The mb has two ethernet drivers, one is NVidia and one is Marvell. The lights on the ports blink and the modem (cable) is good. I have another computer using it and it works fine. My usbD-Link wireless adapter connects to the internet flawlessly. I don't know what more I can do.