Thanks again for your quick response. I followed the steps below including resetting the router to the factory defaults and loading the latest firmware. Once again, I got the same type of errors. At...

Thanks for the reply. The sticker on the bottom of the router indicates it is a US router. The firmware version is: 1.2.2 Build 20170912 rel.56240(5553) Hardware version: ArcherC5400 v2.0 This...

I purchased an AC5400 from Sam's Club. None of my devices that requires 2.4Ghz will connect to the network. This includes my HP printer, Ring doorbell, Rachio sprinkler or other household items....