Hello, I have bought this router yesterday, and just set it up a while ago. Yes, wifi connection looks good, it works on both 2.4ghz and the 5Ghz. But when I connected it to my pc, I noticed that the connection was not stable. When trying to use speedtest, it always fails to connect. I can say that theres no problem on my ethernet cable as it works with my old router (TPlink TL-wr841hp). Regarding on the led lights, all of them are in green.

I tried to reinstall my network driver, changed the ethernet cable, changed to static / dynamic IP, I have also reset it to default settings several times but none of them works.

Any inputs on how to solve this issue?

Thank you.