To Fix Arris Router not Working issue follow the guide
Look at the back of the Arris router, there will be a reset button.
Gently press and hold the reset button using a toothpick or any sharp object.
Leave the reset button after 12 seconds and wait for the Aris router to reboot.
After rebooting the Aris router, you should understand that your device has been restored to factory default settings.