I have a AC1750 Archer C7 That I can not figure out why the wifi isn't working.  Had a power outage, after that I re booted the modem and router.  I had to reset the router to get the wired cables to come back on.  I have all lights to include the 2.4GHz and the 5GHz. all green.  I can go to the iPads and the iPhones, check that they see the wifi signal and I can see the mushroom signals.  No internet. What's missing?