I have tried all that, nothing works. I will return it and try a new one, I hope next one will work.

@IrvSp It goes white for a second or 2 then pulse orange for a while then goes white again... keeps doing this forever. impossible to ping like I said all the 8 ports doesn't send any data (little...

@ArcherC8 Ok thank you, yes I did the factory reset many times. Next thing I didn't try is to unplug the coax cable from my modem, but even that doesn't make sense if I'm not able to communicate with...

how? like I said in my post, I am not able to communicate with the router, on any of the 8 ports.

I just received yesterday my new Archer c5400x. Unfortunately after 3 hours of troubleshooting it's still doesn't work. I am familiar with router setups for years and never saw that before, wondering...