@ArcherC8 Yup, I forgot about an extender that was plugged in, and it went all wonky. I unplugged it and things were OK again. Now I will reset it and reconfigure. Thanks!

The router has been working fine for 2+ years. My 2.4Ghz SSID is "abc" and my 5Ghz ssid is "abcD". I had a power outage and suddenly I couldn't connect to Wifi anymore. So I turned off the router,...