Anyone ever have their onboard LAN up and die on them? Completely disappear from Device Manger? How/if/did you ever get it back?

[VirtualLarry]

Great mystery here, my Asus B450-F ROG STRIX Gaming ATX board, has "eaten" two NICs. First was the Asus 10GbE-T NIC in the bottom-most slot, and then the onboard Intel LAN disappeared entirely too.

The BIOS option for "Enable|Disable" for Intel LAN and LAN Option ROM are still there. And something lights up when I plug in an ethernet cable.

But nothing in Device Manager.

Did a service get stopped, perchance?

I installed something, that installed WinPCap. I've since un-installed it, but maybe that screwed something up with my NICs?

Edit: It should be noted, that there was/is something going on the with the two USB 3.x Type-A ports directly below/next-to the onboard Intel ethernet jack. I had my two USB 3.x hub extension cables plugged in there, one into a 7-port USB 3.x hub without separate power, though only my mouse and keyboard are plugged into it.

Anyways, when I cold-boot, I can use my USB keyboard to enter BIOS, but when the Windows 10 lock screen comes up, the keyboard / mouse are not lit up (they are lighted), and they are non-functional. Maybe I need to change my XHCI handoff settings? I never changed them from default in the BIOS/UEFI. I have CSM disabled, maybe that's part of it. (I wonder if that affects the NICs? But I reset settings in BIOS using "Optimized Defaults", then I rebooted, and it booted my secondary Win10 installation on my SATA SSD I use for emergencies, since the NVMe RAID requires enabling NVMe RAID and disabling CSM entirely. The onboard Intel LAN still wasn't found in Device Manager, after resetting the BIOS to defaults.)

 

[vailr]

Check for latest motherboard bios, then unplug any ethernet cable & re-set the motherboard's CMOS.
Note: leaving an ethernet cable connected can potentially prevent complete power down of the ethernet controller.
Power the system off completely, using the PSU rocker switch, then press and hold the front power switch for 4 seconds. Switch power back on using the PSU rocker switch. Re-boot to Windows and check Device Manager for presence of the LAN port.
If still no ethernet port shows, either a complete re-install of Windows, or RMA the motherboard.

 

[VirtualLarry]

Good tips, I'll try those. I do think that perhaps Asus has some sort of LAN anti-surge chip, that might need to be reset in that manner.

 

[bbhaag]

My son has an MSI Z77 board that the on board LAN died on. No matter what I tried it just refused to work so I ended up buying a add on card for the pcie slot and it has worked well.

 

[john3850]

For the last 16 years every new board gets a intel nic pro to avoid any problems.