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The T-con board controls the picture elements on the screen. Usually replacing this board will solve the problem. If you can touch the screen and the lines disappear and later reappear, that says the screen itself is defective. The only fix is to replace the entire screen.
My 3-year old 52-inch Toshiba flat panel TV (Model # 52RV53U, Serial # AM409000295) developed a display problem (purchased Aug. 2008, manufactured July 2008). Vertical multicolored lines appeared on the screen just left of center. The band of thin vertical bars is 5.5 inches wide. The lines are about 1/16-inch wide. They are stationary, always exactly in same place. They over-ride any other picture on the screen (no transparency). They are there all time even with no video inputs to the TV after the unit is turned on. See picture #1. The TV works well in every other respect, but, obviously, it is annoying to watch the picture with the color band blocking about 1/6 of the picture.
Further info, pics, comments, and updates on my Facebook page at
I already swapped out the TCON board with no improvement and replugged the TCON board cables with no improvement.
Most likely it is the flat panel tab bond failure (panel made by Samsung). Further solution updates will be on my Facebook page.
1) Have you installed new drivers or software or drivers? If so, remove them and restart the computer.
2) Try applying pressure with your fingers on top of the screen. If the band dissapears or dimishes, you may have a broken screen and it will need to be replaced.
If you are able to see a complete picture though darl in the middle where the band is I would suspect a back light problem or an image processor problem, if the band is totally dark(dead pixels) you can not see a picture in the same area then you have a defective screenand has to be reolaced.