Asus A8V mother board will not show on switch. Second computer does. Swapped cables, same. Is this board noted as having such an issue?

Over the years, I've seen that happen many times. Since we can't swap every board that happens to we pop in some NIC and disable onboard in the BIOS.

That confirms my suspicion. Thank you for your reply.

There is also the possibility that the network card has been disabled in the OS - this can be done in Windows or Linux both. Go to the networking page in the OS and disable the network card, reboot, and re-enable it again. I've seen this work on either type of system. Often the rebooting part is not needed, especially for Windows.