Not to be rude but you are driving a unit that my dealer hasn't even gotten yet. If there is something wrong, or you're not happy with it, you need to be at the dealer's doorstep and get them to fix it. Now, to answer your question: there are at least 10 things that can cause your cable to be snowy. Most of them have to do with connections or connecting cables. And after that, the cable service its self. But dude, don't wait til your warranty is out to get these little nuisance problem fixed by the dealer. That's what you paid them for.
[FONT="]But the true travelers are they who leave for leaving’s sake[/FONT]
[FONT="]Saying continuously, without knowing why: ‘Let us go on’.[/FONT]
Paraphrased from Baudelaire’s ‘The Journey’