LG 43UJ634V 43" Smart 4K Ultra HD HDR LED TV

This is the tv I am having trouble pairing my JVC wireless bluetooth headphones. I have the 55 inch version in my lounge and they paired up with

that instantly but not with the 43 inch model which is in my bedroom. I have a pair of in ear cheap headphones which pair on both but I need the other

ones as I am partially deaf, without them I miss all the background noises ect and its proving annoying.

Thanks in advance