If a laptop's Ethernet port is not working, test the cable and the router port first, then look at the network adapter in Device Manager and the status message: "Network cable unplugged" points to the cable or port, while "Unidentified network" or "No internet" points to settings. Restart the router, run the network reset, update the adapter driver and turn off power saving for the adapter. If a USB Ethernet adapter works but the built-in port does not, the port or the board behind it needs repair.
Wi-Fi is convenient, but a cable is still the most dependable connection for video calls, large downloads and office work. When the cable stops working, the cause is usually something simple: a worn cable, a dead router port or a setting. This guide goes from those to the laptop's port, and shows how a USB adapter can tell you which side is at fault.
Start with what the laptop says
Click the network icon in the taskbar, or open Settings, then Network and internet, then Ethernet. The message narrows the cause.
| Message | What it usually means |
|---|---|
| Network cable unplugged | No link: bad cable, dead router port, loose plug or a faulty laptop port |
| Unidentified network | Link is there but the laptop did not get an address from the router |
| Connected, no internet | The router or the broadband line has a problem, or DNS is failing |
| No Ethernet entry at all | Adapter disabled, driver missing or hardware not detected |
Check the physical side
- Look at the port lights. Most Ethernet ports have a green or amber light that glows when a link is made. No light on either the laptop or the router means no link.
- Try another cable. Cables fail where they bend, and the small clip on the plug often breaks, which leaves the plug loose.
- Try another router port, and a different device on the same cable. If another laptop works on the same cable and port, the fault is in your laptop.
- Check the plug and the port. Look for a bent pin, dirt, lint or a plug that does not click in. Never force it.
- Restart the router and the laptop. Switch the router off for a minute and on again.
- Check for a wall socket or switch in between. A cheap switch or a damaged wall socket can be the weak link.
Settings and driver fixes
- Turn the adapter off and on. In Settings, Network and internet, Advanced network settings, choose More network adapter options, right-click Ethernet and disable it, then enable it.
- Renew the address. Open Command Prompt as administrator and run ipconfig /release, then ipconfig /renew.
- Reset the network stack. Run netsh winsock reset and netsh int ip reset, then restart.
- Use Network reset. In Advanced network settings, choose Network reset. It removes and reinstalls all network adapters and clears saved Wi-Fi details, so note your Wi-Fi password first.
- Update the driver. Install the LAN driver for your exact model from the laptop maker's support page. The adapter often appears as a Realtek PCIe controller or an Intel Ethernet connection.
- Turn off power saving for the adapter. In Device Manager, open the adapter's properties and untick "Allow the computer to turn off this device to save power". On the Advanced tab, leave Speed and Duplex on Auto Negotiation.
- Check the BIOS. A few laptops have a switch for the onboard LAN. Our guide to opening the BIOS shows the keys.
The USB adapter test
A USB-to-Ethernet adapter is inexpensive and settles the question. Plug it in and use the same cable and router port. If the adapter gets a connection and the built-in port does not, the router and the cable are fine, and the laptop's port or the chip behind it is at fault. If the adapter also fails, look at the cable, the router or the account settings again. USB-C docks and adapters need to support Ethernet, so check before buying.
Signs the laptop's port has failed
- No port light, even with a cable that works on another device.
- The plug is loose, wobbles or does not click in.
- The link drops when the cable is touched.
- The adapter is missing from Device Manager even after a driver install, and the BIOS does not show it.
- The fault began after a knock, a tug on the cable or a power surge. Lightning and surges can damage the network chip through the cable.
An Ethernet port is soldered to the board and takes strain whenever the cable is pulled. A technician can resolder or replace the port, and if the network chip itself has failed the repair is a board-level job. Thin laptops that have no port were built to use an adapter, and a failed adapter is simply replaced. Our laptop Ethernet port repair page explains the repair, and laptop network port repair covers the wider case.
Use Wi-Fi in the meantime
Wi-Fi works as a stopgap while the port waits for repair. If the wireless connection is poor, see our guide on laptop Wi-Fi not working. For slow connections on any device, the slow Wi-Fi guide helps.
Getting it checked
Tell us what the laptop says, which tests you ran and whether a USB adapter worked. We collect within 2 hours of a booking by call or WhatsApp, the inspection costs ₹350 and is credited if you go ahead, and board-level work takes two to five days. For the nearest branch, see laptop repair near me.
Frequently asked questions
Why does Ethernet say "Network cable unplugged" when it is plugged in?
No link is being made. A bad cable, a dead router port or a damaged laptop port are the usual reasons. Test with another cable and another device.
Why is my Ethernet slower than Wi-Fi?
An old cable, a port that negotiated a lower speed, or a router port limited to a slow speed. Try another cable and check the adapter's speed in its properties.
Can a damaged Ethernet port be repaired?
Often yes, by resoldering or replacing the port. If the network chip is at fault, it is a board-level repair, and an adapter may be the simpler answer.
Do I need Ethernet if I have fast Wi-Fi?
No, but a cable is steadier for video calls and large transfers, and it avoids interference.
