RAX43 is receiving internet signal but all devices say no internet connection.

Had a power outage and when power came back on no internet. I have rebooted numerous times and have reset to factory settings and still can’t get a signal. All the lights are on router are lit up showing a internet connection. When I unplug the modem from the router the internet light goes out when plugged back in it comes back on. So I know it is getting the internet signal from the modem and the router is sending out a signal but with no internet connection. What to do?