If your router light is flashing, this means that the service is initialising or that data is being exchanged (i. The tables in this article provide detailed information about the possible appearances of the LED lights on each device, the possible causes of each state, and what you should do. Solid Green: The ONT is powered on and functioning normally. POWER Normal: Solid/stagnant light. PON (Passive Optical Network) Normal: Solid. In this guide, we will break down the common status indicators on your router, what they mean, and how to use them to troubleshoot any potential issues.