I have had BT TV for a while and it has been working fine until the BT Vision box was replaced with a YouView+ box recently. Since then I am getting an error when watching live TV through the YouView box stating:
TV Signal Problem
Your TV signal is weak or lost.
Select Help for more information on YVM302 or visit support.youview.com
I have restarted the YouView box which fixes the issue for a while but it then starts again. Once the problem starts, it happens regularly until the box is restarted again.
When watching the same channel directly via the TV rather than the set top box, it works fine without any problems with the picture or error messages.
The aerial on the roof has been checked and replaced recently and the YouView box has also been returned and checked for updates.