Brain fuzz - connecting TV to router wirelessly

[BaggyAndWrinkled]

How do I do it?! Router is in another room. I have a smart TV, telephone points and an Ethernet cable. Still confused!

The TV is already connected to wifi - that paired successfully enough- I keep getting a No Broadband message

If it's that the WiFi doesn't reach as far as the room the tv is in, it might be worth trying a mesh system. You plug the main unit in to the phone socket like your existing router then set up another 'slave' unit anywhere you have WiFi dead spots in the house. We had terrible coverage upstairs, had tried plug-in extenders with no success but a mesh system sorted our problem.