@Sunshine Also, to answer your question: the extender works if I relocate it on the second floor

@Sunshine thank you for getting back! Update: I think I know for sure now that my treadmill is interfering with the powerline extender. My treadmill is located on the bottom floor in the same room as...

I have successfully installed the TL-WPA7517 powerline kit to extend my wifi connection from one end of my second floor to the other. Now I want to have a wifi connection on my first floor as well,...