Ethernet Port Not Working

[AxisHax]

Two weeks ago my ISP came to upgrade the whole connection in my house after many complains about stability and service in general. I wasn't home when it happened, a relative of mine was, but when I arrived home I turned on my PC to check if everything was fine and there was no connection, the ethernet port had stopped working. I haven't had much time to work on it since.

Yesterday I tried uninstalling the drivers and rebooting the computer, but it didn't work.

One of the LEDs blinks orange when I plug the ethernet cable and then it turns off.

[AxisHax]

Now I'm about to reinstall the LAN drivers through an USB drive.

[AxisHax]

By the way the cable is not the problem, it works with other devices.

[AxisHax]

Please, I need to fix this as soon as possible.

Does anyone know if there's a quick fix to this problem or I should just buy a PCIe network card?