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If your CenturyLink router shows “no internet connection”, here’s a step-by-step guide to troubleshoot and (hopefully) fix the problem. This works for most CenturyLink routers, including the C4000 series, C3000 series, and older models like the C2100T or C1100Z.
Step-by-Step Fix for CenturyLink Router with No Internet
1. Power Cycle Everything
Unplug the router and modem (if separate) from power.
Wait 30 seconds, then plug in the modem first (if separate).
Wait until it fully powers on (1–2 minutes), then plug in the router.
Wait until lights stabilize.
Sometimes this is all it takes to resolve temporary glitches.
2. Check the Lights on the Router
Here’s what the indicator lights usually mean (varies slightly by model):
Power: Solid green = good
DSL/Internet:
Blinking = trying to connect
Solid green = connected
Red = problem with DSL or authentication
WiFi: Solid or blinking = WiFi is active
Ethernet/Device: Lit when a device is connected via cable
If DSL/Internet is red or blinking constantly, it's not connecting to CenturyLink.
3. Run the Modem Self-Test (if available)
For newer modems like C4000 series:
Go to a web browser and visit: http://192.168.0.1
Log in (username: admin, password is on the label)
Navigate to Modem Status DSL Status or Diagnostics
Look for error codes or messages like “PPP Authentication Failed” or “No DSL Sync”
4. Check Your CenturyLink Username/Password
If you’ve recently reset your modem or changed service, your PPP credentials might be missing.
Log in at http://192.168.0.1
Go to Advanced Setup Broadband Settings
Enter your PPP username and password (something like yourusername@qwest.net)
You can contact CenturyLink if you don’t know them
Incorrect login = no internet.
5. Check for a Service Outage
Sometimes the problem is on CenturyLink’s side.
Go to: https://www.centurylink.com/repair/
Or call 1-800-244-1111 (residential tech support)
You can also use your phone data to search “CenturyLink outage + [your ZIP code]”.
6. Test Internet with Ethernet
If you're on WiFi, plug in a laptop directly to the router with an Ethernet cable.
If Ethernet works but WiFi doesn't, the WiFi settings may need resetting.
If neither works, the internet itself is down.
7. Factory Reset the Router
If all else fails:
Use a paperclip to hold the reset button on the back for 10–15 seconds
Wait for it to reboot and go through setup again
You’ll need to re-enter your PPP login and WiFi password
8. Call CenturyLink Support
If nothing works, there could be:
A line issue outside your home
A failed router/modem
A service provisioning problem
CenturyLink Internet Tech Support:
1-800-244-1111 (24/7) #centurylink #internetrouter

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