how to record tv screen with the main remote?

i bought lg samrt tv, when i click "REC" it give me this error "unable to start recording signal is not supported" how can i fix this pls?

2017-04-11T00:37:33.809Z

Trending Questions

I accidentally peed on my new plasma TV?7 answersAll of the channels of my new television come in great, but one. sometimes the picture and sound are distorted, other times it is fine.?6 answersWhat should I do with a TV that doesn’t work?18 answersWhat is a good TV for me to buy for under £500, no Chinese brands?6 answersWhere to buy a replacement screen for a Vizo Flat screen?9 answers