Ethernet cable not working: troubleshooting

A wired internet connection is more reliable and faster than WiFi. But what do you do when your Ethernet cable isn't working?

First checks

Check the physical connection

  • Is the cable pushed all the way into the port? You'll hear a click.
  • Is the cable free of damage?
  • Is the plastic clip on the connector still intact?
  • Is the cable not kinked or pinched?

Check the LED lights

  • Green LED on: Active connection
  • Blinking LED: Data is being sent
  • No LED: No connection
  • Orange LED: Slower connection (100 Mbps)

Test with a different cable or port

Try a different Ethernet cable

  • Use Cat5e, Cat6 or Cat6a for optimal performance
  • Avoid cables that are coiled up too long
  • Test with a cable you know for sure works

Try a different port on your router

Routers usually have several ports. If one port is faulty, your connection won't work.

Windows network settings

Check that the network adapter is enabled

  1. Right-click the Windows Start menu
  2. Select Network settings
  3. Click Change adapter options
  4. Check that Ethernet isn't disabled

Reset the network adapter

  1. Open Command Prompt as administrator
  2. Run:
    • netsh winsock reset
    • netsh int ip reset
    • ipconfig /release
    • ipconfig /renew
  3. Restart your computer

Updating network drivers

  1. Open Device Manager (Windows + X)
  2. Expand Network adapters
  3. Right-click your Ethernet adapter
  4. Select Update driver

Troubleshooting your router

Restart your router and modem

  1. Turn them off by unplugging them
  2. Wait 30 seconds
  3. Plug in the modem first and wait until it's stable
  4. Then plug in the router

FAQ

Why is my Ethernet light blinking but I have no internet?

You have a local connection to your router, but the router itself may not have an internet connection.

Can an Ethernet cable wear out?

Yes, especially if it's bent often or exposed to heat.

Which is better: Cat5e, Cat6 or Cat7?

For home use, Cat6 is the best choice in terms of value for money.