I have a 3 + year old wall mounted TV Samsung Model UN55 NU710D Software Version T-KTM2LAKUC-1210.4 Yesterday it developed a picture issue: 3 x 7 in solid black strip near top-center of screen, Horizontal 1 px lines from left and right side of screen to black strip, Some vertical 1 px colored lines adjacent to black strip, some of these pass through the black region in an adjacent blacked out oval region. I've cycled power from the wall outlet, checked for newer software to no avail. Wondering if this is likely to be a ribbon cable issue, video processor issue or some other problem. If it sounds like a processor issue, I don't want to disassemble it to replug ribbon cables.
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