I have a Sony Wega, been having issue getting the picture desent(still SD signal) to somewhat likable quality. If I am watching something, anything especially animation or text like a phone number for a commercial perhaps, it has a grainy look to it. Not only is it grainy, but it seems to 'move' almost and is more noticable at the transistion of lines of colors, if that makes sense. I have smoothed it out as much as I can in the TV menu. Is this line noise, can running the RF cable(RG6) it too close to power cause this. I have also noticed that where to sat. dish is mounted is very very close to where the power comes into the house like 12 inches or less. Actually the RF cables from the dish actually cross over (on top of) the conduit. And also the multi switch has a screw on it with a hole, should I run a ground wire from this to a ground ? I know that it is not the TV because when I view things like the TiVo menu it is clean and very smooth. Will be upgrading to HD soon but need a the advise I can get first .

Thank you !