Arris router

Arris router blinking green light becomes problematic when the light stays on for an extended period, showing some issues in networks down, powering problems, cable problems, or signal interference. This can be solved by ensuring that the connection and voltage setup to the router are in good condition, and you can also consider communicating with your ISP or minimize signal interference by using more network cables and checking upstream and downstream signal levels.

https://arrislogn.com/why-is-arris-router-blinking-green-how-to-resolve-it/