The onboard LAN on my motherboard is no longer being detected in Windows 7. It was functioning up until yesterday, when I upgraded the Graphics Card. I flashed the BIOS to F21 to support the card, however I've since flashed back to F18 to see if it would bring it back which it unfortunately hasn't.

I've reset the CMOS with the jumpers and removal of the battery and still the BIOS is reporting the LAN MAC as N/A.

Any ideas or is it time to go back?