I had an Arris router/modem combo provided by Spectrum for my internet service. Hookup was as simple as coaxial from outside to Arris and Arris to computer and ethernet to laptop and Android tv box. All working fine. I replaced this with an Asus cm-16 modem and an Asus AC86U router. Hookup is coaxial from outside to modem, modem wan port to router wan port, lan port to computer, working fine. Ethernet from router to laptop and android tv box,(works on wifi just fine), NOT working. Internet light on router is RED. Get an "error code 651". Asus forum says 651 is windows related. Following instructions from a link given on Asus forum, updated all drivers and software related issues. Still not working. Upon hookup, router updated to latest firmware automatically. Since I am not a teckie, I have no idea what to do. Can anyone help me out here? THANKS