Went back to Micro Center and they actually replaced it with a RT-AX68U Pro.
This one configured without a hitch.
The only thing I can think of, I powered off the modem for at least 15 minutes... Eh...
Hopefully it will be a good unit for the same number of years the R7000 has been for me...
I was planning to retire my Netgear R7000, which still works, but the wireless is dropping every two weeks or so.
My modem is a Motorola MB7621, connected to Comcast with a 200MB/5MB service.
I recently purchased an Asus RT-AX86U from Micro Center.
The web page is showing it connecting, by...