peeledbacks

I tried, didnt help, thank you though

Hey tech tippers, so I got a computer a while back and decided i wanted to use 2 monitors. I plugged the second one in, and suddenly my internet just stopped working, despite saying i was still connected via ethernet (i use powerline by the way). The internet still works if i have the second monitor plugged in but turned off, but as soon as i turn on the second monitor my internet just stops working. Any solutions or advice? It would be greatly apreciated, thank you.