Hi
Check if all the necessary cables are correctly connected. Please check if the cable contains the digital TV signal supplied by your cable TV service provider. Please make sure the correct signal source is selected: Press the "menu" button on the remote control, select "External Input", and choose the correct signal depending on your using environment.
Please view this article to get more details:-
http://www.ehow.com/how_6041027_fix-snowy-screen-satellite-tv.html
Please get back to us if you have further query else please accept the suggestion.
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