Only fiber optic light is on the router

If only the fiber optic light on your router is on, it usually means your router is receiving a fiber signal but is not yet connected to your devices or the internet.Understanding the LightsMost fiber routers and ONTs have multiple LED indicators for Power, Fiber/Optical, LAN, WAN, and Wi-Fi. The fiber optic light specifically shows whether the device is receiving a proper signal from your ISP's fiber network. A solid light generally indicates the fiber connection is active and stable, while other lights like LAN or internet may remain off if no data is being transmitted or if the router is not yet connected to your network devices .Common Reasons Only the Fiber Light is OnNo Ethernet Connection to Router: If the LAN light is off, your router may not be properly connected to the ONT via Ethernet, or the cable may be faulty .Router Not Fully Initialized: Some routers take a few minutes to establish a full connection after powering on. During this time, only the fiber light may be solid while other lights are still off or flashing .No Internet Service or Misconfiguration: If the WAN or internet light is off, it could indicate that the router is not receiving an IP address from your ISP or that the service is not active .Device Not Connected: If no devices are connected via Wi-Fi or Ethernet, the corresponding LAN or Wi-Fi lights will remain off .Troubleshooting StepsCheck Cables: Ensure the fiber cable is securely connected to the ONT and the Ethernet cable is firmly connected between the ONT and your router .Restart Devices: Power off both the ONT and router, wait 30 seconds, then power them back on. Wait a few minutes for the lights to stabilize .Test Ethernet Cable: Swap the LAN cable with a known working one to rule out a faulty cable .Check ISP Status: Log in to your ISP account or contact support to confirm there are no outages or service issues in your area .Verify Router Settings: Ensure your router is configured correctly for your ISP's network, especially if it was recently reset or replaced . If after these steps the LAN or internet lights still do not come on, it may indicate a network issue that requires your ISP's assistance .