Just se up my new 4k tv. Did have the source selected via scart from my Sky+ box, but changed it to The hdmi1 port. When changing channels a narrow white bar briefly appears on the bottom of the screen. Hdmi1 1080@50hrtz some programs come up as
Hdmi1 576@50hrtz. Does this info show what picture quality is shown? Thought 4k was 3800.