NIGHTHAWK X6 AC3200 R8000 won't connect on primary band.

[PHILLYCRG]

I have 2 of these routers and the first one I set up without any difficulty and works just fine.  Unfortunately the one I set up in my home won't connect on the primary band.  I've had to manually enter the wifi password on the other bands on each of my devices in order to be able to connect to the internet.  Unfortunately, I can't do that with simpler devices like my printer and Sonos that only recognize the primary band.  Why won't anything connect to the internet through the primary band?

[DarrenM]

Are you using smart connect? if so have you tried to disable it and then connect those devices?

DarrenM