You suggested OP try different resolutions (720, 1080, etc).
OP stated TV was not HD (ie SD).
So resolutions won't make a difference.
Therefore, understanding what model TV and STB will help in correcting the issue.
You suggested OP try different resolutions (720, 1080, etc).
OP stated TV was not HD (ie SD).
So resolutions won't make a difference.
Therefore, understanding what model TV and STB will help in correcting the issue.