To do this safely and without damaging your TV, please see the video below for how to open a tv panel… If you suspect a loose cable within your TV, you will need to open up the TV and secure the cable and check the T-Con board. More TV Issues: TV Screen Is Black – Powers ON But No Picture What can be done to fix vertical colored lines on a TV? To fix this permanently, you need to troubleshoot the issue and find out which wiring harness may be loose, faulty or damaged. This is not a permanent solution, but may prevent the vertical colored lines from showing temporarily. If so, you may simply have a loose wiring cable. If you experience a TV showing colored vertical lines, try gently tapping in different areas on the back of the TV, you may see the vertical colored lines go away completely or they might decrease in intensity. What to do when your TV has colored vertical lines showing? If you knock on the back of the TV, the vertical colored lines MAY disappear temporarily. This is a sign that a cable is loose or the T-Con board is faulty. When a TV is showing vertical colored lines, a loose wire cable in the TV might be the cause. What causes vertical colored lines on a TV screen?
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See here for info on how to diagnose and fix a cracked TV screen.
A loose wire or bad T-Con board is explained below. A TV screen that shows vertical colors may be caused from a loose cable wiring, loose board, a control board “grounding” issue, a damaged screen, or a faulty T-Con board.
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