Internet Not Working? Complete Troubleshooting Guide

1. Find the Scope of the Problem

Try two websites and then test another phone or computer on the same network. One failed website suggests a site-specific problem. One failed device suggests a device setting or adapter problem. Every device failing suggests the router, modem, line or ISP.

2. Check the Physical Connection

• Make sure Airplane mode is off and Wi-Fi is enabled.
• For Ethernet, reseat the cable at both ends and try another LAN port.
• Look for damaged cable clips, sharp bends or loose power adapters.
• Check whether the modem or ONT has a red LOS, offline or alarm light.

3. Restart in the Correct Order

1. Turn off the router and modem or ONT.
2. Wait about 30 seconds.
3. Turn on the modem or ONT first and wait until its connection light stabilizes.
4. Turn on the router and wait two or three minutes.
5. Reconnect one device and test again.

4. Repair One Device

Restart the device, forget and reconnect to Wi-Fi, disable a VPN temporarily and try a private browser window. Windows users can continue with the internet repair commands when basic checks fail.

5. Contact the Right Support Team

Contact the ISP when every device is offline, the modem cannot lock onto the line or an outage is reported. Contact device support when other devices work normally but one device has no adapter or repeatedly drops the connection.

Related Internet Guides

Trusted References

For additional technical details, see Microsoft Wi-Fi troubleshooting.