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I have samsung ua40d6600wr tv, I m facing the same issue
Viraj Gurao if your issue is the same as the question where you left this as an answer. then I go with the same answer. It sounds like a TAB failure. The flat ribbon cable that enters the LCD panel is actually bonded (sort of lued) to the contacts. If that bond fails the area of where it fails will display a single pixel wide vertical line. To verify this it might help if you post some pictures of what your TV screen shows you. That way we could see what you see. Use this guide Adding images to an existing question for that.
