why does my lg smart tv not go back to live tv after watching a dvd on my panasonic recorder when i swith the recorder off, it

Jan 13, 2019
I have a new LG smart tv I have connected my Panasonic HDD/DVD recorder to the tv via a hdmi cable , which works fine, but when I want to go back to live tv I go back to settings select live tv but it does not want to work. With my old tv as soon as I turn off the Panasonic recorder it automatically went back to live tv. Is there A setting I need to adjust ? can anyone help?
Thanks for reading, Doug.