Why Is My Ethernet Not Working? A Complete Troubleshooting Guide

Updated on August 5, 2025, by ITarian

Are you frustrated because your wired internet connection isn’t working? If you’re asking, “why is my Ethernet not working?”, you’re not alone. Ethernet connections are often more stable than Wi-Fi, but issues can occur due to cable faults, driver problems, or network settings.

This guide explains common causes of Ethernet issues, step-by-step troubleshooting tips, and solutions for Windows, macOS, and network devices.

Why Ethernet May Stop Working

Several factors can cause Ethernet connection problems:

Loose or damaged Ethernet cable
Incorrect network settings or disabled adapter
Outdated or corrupted drivers
ISP or router issues
Malware or firewall misconfiguration

How to Fix Ethernet Not Working in Windows

1. Check the Cable and Port

Ensure the Ethernet cable is securely plugged in.
Try a different cable or port on the router/switch.

2. Restart Your Devices

Reboot your PC, router, and modem.
Many network issues resolve after a restart.

3. Enable the Ethernet Adapter

Press Windows + X → Network Connections.
Right-click Ethernet → Enable (if disabled).

4. Update Network Drivers

Open Device Manager.
Expand Network adapters, right-click the Ethernet adapter → Update driver.

5. Reset TCP/IP Settings

cmd

CopyEdit

netsh int ip reset

ipconfig /release

ipconfig /renew

How to Fix Ethernet Not Working on Mac

1. Check Network Preferences

Go to System Preferences > Network.
Ensure Ethernet is connected and prioritized.

2. Renew DHCP Lease

Click Advanced > TCP/IP → Renew DHCP Lease.

3. Reset Network Configuration

Delete the existing Ethernet service and add it again.

Router and ISP Troubleshooting

Restart the router/modem.
Check if other devices connect properly.
Contact your Internet Service Provider if the issue persists.

Advanced Troubleshooting for IT Managers

Ping Test: Run ping 8.8.8.8 to verify internet connectivity.
Check for Malware: Malicious software can block network traffic.
Check Firewall Rules: Ensure the firewall isn’t blocking Ethernet connections.
Use Static IP: Manually configure IP if DHCP isn’t working.

Preventive Tips to Avoid Ethernet Issues

Regularly update drivers and firmware.
Use high-quality, undamaged cables.
Avoid making unnecessary changes to network settings.
Secure devices against malware that may disrupt connections.

FAQs About Ethernet Issues

1. Why does my PC detect Ethernet but no internet?

It could be a DNS or IP configuration issue. Try resetting TCP/IP settings.

2. Why is my Ethernet slower than Wi-Fi?

Faulty cables, outdated drivers, or incorrect speed settings could be the cause.

3. Can malware block Ethernet?

Yes, certain malware can interfere with network connectivity.

4. How do I check if my Ethernet port is faulty?

Try a different cable, device, or port on your router to rule out hardware issues.

5. Should I disable Wi-Fi when using Ethernet?

It’s better to disable Wi-Fi to ensure the system prioritizes the wired connection.

Final Thoughts

Knowing why your Ethernet is not working and how to fix it can save time and frustration. Start with basic checks, then move to advanced troubleshooting if the issue persists.

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