My Internet light on Nighthawk router is not lighting up what should I do?

I have had a R6700v3 Nighthawk Wifi router and CM1000v2 Modem  for over a  1 year.   Today the power went out breifly and we lost the wifi connection.  I logged into Netgear Genie and attempted to reset everything.  It didnt work.  I unplugged the modem and the router and reset it all, and when it comes back on, there is internet coming from the modem but the internet light on the router remains not light up and colorless.  I called my ISP and they confirmed the modem is functioning properly.  I bypassed the router and plugged the ethernet directly from the modem to the computer, and I have internet.  I have done everything possible except for buying a new router modem and cable. For some reason there is no internet connection or internet light when I plug the ethernet from the modem to the router. Is there a way to fix the modem and router connection without buying something?