Hello! First time publishing here.

I need some help because I am loosing my mind. I moved a new apartment and I have my router on my living room, but my computer is on the other side of the flat, so WiFi cober is very poor on that room. Anyway, I wanted an Ethenet connection for my computer, so I bought a TP-Link Powerline Adapter Set TL-PA4010P KIT so I basically plugged one near my router and another near my computer, and it worked very fine.

Next week I decided that I needed more WiFi cober on that side of the house, so I ALSO installed a WiFi repeater TP-Link TL-WA860RE and I created a new wireless network with a different name, so I had my router WiFi network (2.4 and 5) and this one (which I called _EXT and it was 2.4).

The problem is that after a few hours plugged in, the router's WiFi networks and Ethernet connection stop working. It just says it has No Internet and it doesn't work or work a few minutes and just stop.

I have tested it unplugging and resetting the Ethenet and the WiFi repeater, I have rested my router and nothing work. Can you help me?

Thank you!