TV has no sound when turning it on but is not consistent. Moving box affects signal and sound. Unplugging box does not fix problem. Sending signal does not fix problem.
Moving the box means either one of the cables is loose (or coaxial cable cord has end connector coming off), or a shorting circuit board inside the box. Check all the connections.
Hello grannythree, have you tested this issue with another device like a Blue Ray player, gaming system, or just your TV on a different source/input channel? I see that you have more than one cable box, do you have the same issue on all of your equipment?