Sound is mute randomly. For a month it is happen two time. All remote was on the table. Not any user interaction with remote controls. Just activate mute. Not show any mute image on TV.
First time I was thinking that TV channel have some external problem with signal. Now I am experienced user and know. If my sound stop work for easy workaround must pres mute to turn off.
This is real true. I can not believe. So much money for this UHD TV and so many problems.