I had just switched my router to this new Archer C4000 and after installation it starts working perfectly fine, but the next day we start having connection issues.

Im able to see my internet while looking at the different wifi around my area for a couple of seconds then it disappears.

The router lights are perfectly in working condition and my modem is also working

Im able to use my Pc with a Ethernet cord but other than that any actual use of the wifi isnt available unless youre right on the router

What ive done:

Ive tried to change the channel strength back and forth from low to high

Ive tried changed the DNS

Ive done a restart plenty of times

Ive done a factory Restart

Also when seeing the internet from more than 1 or 2 feet i try to connect and it changes from connecting to saved over and over

Ive contacted my ISP and was told to contact my routers manufacturer customer support (unfortunately Tp Link is down for on call)

Ive been trying to figure this out for days but I just cant find out the problem