Access the router's admin panel: Open a browser and enter the router's IP address (e. Enter ISP credentials: If required, input the username and password provided by your ISP. Fiber optic networks are celebrated for their speed and reliability, but even the best systems can encounter problems. When issues like signal loss, slow speeds, or intermittent connectivity arise, systematic troubleshooting is key. Despite multiple attempts, the Archer AX6000 v1. The blue light on top of the router spins around for a. When your fiber optic network stops working, begin with a structured approach. Many fiber internet problems come from dirty connectors or loose plugs, not major faults.