@Sunshine Thank you for taking the time to answer. Regarding the first and second questions you asked, it is exactly the same thing that you said, the lights on the modem stay on and all the systems...

@lvl3164 No one can help? I always thought that model tplink had the best hardware, but now I realized that I was wrong and I completely regret my purchase. My modem model version: td-w8961n(Eu) v4

I bought this modem 10 days ago and I have this problem several times a day. There is no such problem with Tenda modem. Please help me. Virtual Circuit Diagnostics: >> Testing Ethernet LAN connection...