Tiling or pixalating. Same thing. Since comcast switched us to digital in May, this problem has been getting worse and they cannot find the problem. Five techs here weekly in July, then supervisor in August and Sept. They put an amplfier on my home box last week. Same problem, except that last night my screen went black for 90 seconds while watching a show then came back. This is rediculous. I cannot get anyone at comcast to do anything about this.
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