Try a new HDMI cable. Also try it in other HDMI ports on the TV. How is the TV connected to the Hub - if its ethernet cable - try a new Cat6a cable. If wifi - reset the connection.
If that doesnt work try a different TV or computer monitor connected to the V^ to see if the fault lays with the V6 or the TV.
If that doesnt work try a different TV or computer monitor connected to the V^ to see if the fault lays with the V6 or the TV.