Good Evening @Bill_W, thanks for coming back to us.
I've looked into the set top box and this appears to be functioning as expected.
Have you attempted an alternative HDMI port on the TV, as well as a different cable?
We could also do with checking what resolution your V6 box is broadcasting at:
If you could press the 'home' button on the remote, then select 'Help and Settings' > 'Settings' > 'Video Output' > Advise of the number next to Video Output Format.
Kindest regards,
David_Bn