I have a new Netgear CM500 modem connected to a Netgear Nighthawk. I can connect to both the modem and router via ethernet but I cannotg connect to the wifi with more device than the first one to get an ip address.
Have you tried resetting the Nighthawk router back to factory defaults by depressing and holding in the recessed reset button on the rear for 30 seconds.
Yes I have.
I even bought a new router thinking that perhaps my old gateway had had ethernet ports. There are some IP addresses being handed out by the router, but when I try to access the internet there is no data being transferred.