Noise in picture. I bought my Samsung about 3 weeks ago and there seems to be considerable noise that was not there when I purchased it. I've reset it back to defaults and moved all speakers and other electronics away from it but the picture seems noisier than it once was. Also, when the contrast is at the default 55 it's much worse and is diminished by lowering it considerably. Seems my cable modem which once was directly behind it caused some of the problem but it did not the absolute cause. Last thing, this will happen on any medium; whether there is a blu-ray, apple tv, or over air HD channels. Any guidance would be appreciated and sorry if I missed any detail that may be helpful. I know very little about this subject.