Ethernet / LAN Not Working
This guide helps you troubleshoot when your computer fails to connect via Ethernet. Common symptoms include “Network cable unplugged”, “No Internet Access”, or complete loss of connection.
Tip: If Wi-Fi works but Ethernet does not, the issue is likely physical (cable, port, or adapter)
rather than a network configuration problem.
Quick Fix Steps
- Ensure the Ethernet cable is securely connected to both your computer and router/switch.
- Try a different cable or router port to rule out a faulty line.
- Restart your computer and router.
- Check your Ethernet port lights — if none are lit, the connection may be loose or the port is disabled.
Warning: Avoid pulling or sharply bending Ethernet cables — this can damage the internal copper pairs
and cause intermittent connectivity.
Windows Troubleshooting
Run these commands in an Administrator Command Prompt to reset your IP and Winsock settings:
Warning: These commands reset adapter configurations and may remove custom static IP or DNS entries.
Note your network settings before running them.
ipconfig /release
ipconfig /renew
netsh winsock reset
Then, open Device Manager → Network Adapters, right-click your Ethernet adapter, and select Update driver or Enable device if it’s disabled.
Success Tip: After restarting, check “Network & Internet Settings” to confirm you see
“Connected” under Ethernet.
Advanced Checks
- Check for MAC address filtering or static IP assignments on your router.
- Ensure no VPN or firewall is blocking LAN traffic.
- Run
ping 8.8.8.8to verify connectivity once connected. - If DHCP issues persist, set a static IP (e.g., 192.168.1.120) temporarily to test network reachability.
Tip: On managed business networks, contact IT support before resetting or reconfiguring the NIC —
some policies may enforce Ethernet authentication or VLAN assignments.