Hello! 

I've been using the router Archer C20 for some time without any issues, but all of a sudden it stopped working without me doing anything. Basically I can connect to it and it seems like there's a good connexion but when I try to go to the Internet it tells me I don't have any internet connexion.

I tried to setup my router again through the tp link page, but when I do quick setup it gives me the error code 90403. 

I'm sorry if this problem has been said before but I couldn't find a solution when googling it. 

Thanks in advance!