Tv wont Connect to broadband

[n6t6lia]

Hello, I have two Samsung tv’s at home, I recently changed my WiFi network to sky and since then I haven’t been able to connect to wireless WiFi using name and password, Connecting using WPS will sometimes work but disconnects after tv is switched off, I tried typing in IP and DNS manually but it still doesn’t work, have also tried resetting both tvs but nothing works. I do not have sky tv in case that is relevant just the broadband.