You might try calling your Satellite service provider and see if they can refresh/reset your satellite box. Often times, a reset - and sometimes a firmware is available - can fix these issues when they arise.
Have you tried a different cable to see if that might help?
Hi i recently purchased samsung 46 inch 120hz LED TV. I have this flicker problem on SD channels (non HD sat cable). i dont get this problem with blue ray or HD channels. This is pretty annoying as flicker is noticable. Is this some setting issue. Any idea or feedback. I am thinking of returning this TV.