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 … Turn the external device off. Click yes if the picture is clear. Many times this can simply be caused from wiring that is not securely fastened. Go to Settings, picture, and then click Picture Test. When you see lines on your TV screen, move on to other channels to check.

Many of the causes for vertical lines on a television screen is that the ribbon cable which connects to the LCD/LED panel is cracked or faulty. Turn the external device back on.

[Logo] LG: Life's Good How to Fix So you need to do some steps in order to make sure if the issue from the TV or not: ** Press on Home button from TV remote control. Remove the power cord from the wall outlet or powerstrip. Fix#1: Cracked Ribbon Cable. Vertical colored lines usually show on a TV screen when the T-Con board is not working properly. Once all TV and external device picture settings are set,reset the external device. If not, please contact an authorized technician. If the lines are also found on different channels, try changing an input.

You should check the hinge area where normally it fails due to more flex in that region. As TV … When Horizontal or vertical lines appear on the TV screen, identify the root cause by testing the TV picture, Checking cable connections, and verifying external devices are working properly. Wait 30 seconds then re-apply power to the device. If horizontal or vertical lines remain on the TV, theexternal device may need service. Other times the T-Con Board itself may be faulty and need to be replaced. You can also run the picture test.