I tried it already, http://tplinklogin.net . http://tplinkwifi.net , the default ip http://192.168.0.1, but still it had the same result.

Hi, I just bought Archer C5400 2 years ago. I've noticed that the 2.4Ghz has a problem. I tried to reset the router as troubleshooting, after that, I tried to log in the web using tplinkwifi.net but...