[NUC] What to Do If an NUC’s Local Area Network (LAN) Port Is Not Working

Resolution

Follow the guidelines below for troubleshooting LAN connection problem.

StepDetails 
Basics
  1. Reboot the system 
  2. Use Windows Network Troubleshooter.
  3. Re-seat ethernet cable.
 
Check BIOS

Check that Ethernet LAN is enabled in BIOS:

  1. Press F2 during boot to enter BIOS Setup.
  2. Go to Advanced > Devices > Onboard Devices.
  3. Check the box to enable LAN.
  4. Press F10 to save and exit BIOS.

You might see this as Primary LAN and Secondary LAN on some NUC models.

 
Check LAN cableMake sure you're using a known good network cable. 
Check Ethernet driversInstall the latest Ethernet LAN drivers available on Download Center for the NUC. 
Update BIOSInstall the latest BIOS available on Download Center for the NUC.
See BIOS Update Instructions for details.		 
Cold Reboot
  1. Turn off the NUC
  2. Unplug all the cables and peripherals of the NUC.
  3. Press and hold the power button for 20-30 seconds then release it to discharge remaining power. Clearing the CMOS battery is optional.
  4. Reconnect all cables back again and turn on your computer.
 
Check operating systemMake sure you're using a supported operating system for your NUC. 

If the troubleshooting above has been performed and the problem is still not resolved, contact Customer Support.