It seems to happen on TV stations and not one in particular. I think the last time it happened was on a music channel.
As I mentioned to someone on the phone at VM,the box is connected via an HDMI cable to a 4k TV and she said it was a known issue with the box st this stage and for the short term I was told to turn off and on the V6 box till a fix is sorted
Since you mentioned that there was no sound or picture what I would like to do is to arrange for one of our engineers to take a closer look so I'm just going to send you a private message which you will find if you click on the purple envelope at the top right of the screen.
Same problem here too. Sequence is as follows (Samsung TV):
1. If I switch TV on first, then V6 afterwards the picture comes up blank, initially with status bar then just the red button. Sound is fine. If I then switch off the V6 and back on again (with the TV still on) the picture appears correctly with sound.
2. If I switch V6 on first and then the TV afterwards I get picture and sound working normally.