Self HelpBoise Computer Care

Wi-Fi & networking

Ethernet cable connected but not working

Ethernet plugged in but not working? Check link lights, swap cable and port, update the adapter driver, and spot a bad cable by link speed.

Difficulty
Easy
Time
10 min
Steps
5
Updated

Sounds like this?

  • 'Network cable unplugged'
  • Ethernet shows 'Unidentified network'
  • Wired connection slower than expected
  • Link lights off

Step by step

  1. Check that the link lights next to the port light up on both ends.
  2. Try another cable and another port on the router.
  3. Windows: Settings › Network & internet › Ethernet. Confirm it's enabled. Device Manager › Network adapters › update the Ethernet driver.
  4. Disable and re-enable the adapter: Settings › Network & internet › Advanced network settings.
  5. Check speed: if it shows 100 Mbps instead of 1 Gbps, the cable is often damaged or old (use Cat5e or better).

Related error codes & messages

Quick answers

When should I stop and get professional help with "Ethernet cable connected but not working"?

Stop and get help if: No link lights with any cable or port. Wall jacks don't work (wiring needs testing). Boise Computer Care can diagnose it for a $60 fee; call 208-996-3508.

How long does this fix take and how hard is it?

Plan on 10 min. Difficulty: Easy.

Is it safe to try this myself?

Mostly, if you follow these precautions: Don't bend or staple network cables tightly; damaged cables cause intermittent drops.

Which error messages or codes does this guide cover?

Network cable unplugged, Unidentified network, Ethernet doesn't have a valid IP configuration.

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Book a repair at BCCCall 208-996-3508

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