Connection problems between your TV and different devices you use can cause red lines to appear. This occurs because the TV is not fully communicating with the device. Generally, connection problems result from faulty HDMI cables. Replace the HDMI cable connecting the device to the TV and test the screen again.Click to see full answer. Simply so, what does a red line on your TV mean?Typically a red line means you have something that has gone bad on one of the boards inside the tv.Also, how do I fix the red vertical line on my monitor? If the lines only appear in Windows, the problem is a Windows setting — most likely the refresh rate. Right-click on the Desktop once Windows loads and choose “Screen Resolution.” Click “Advanced Settings,” “Monitor,” and then lower the refresh rate to see if the lines disappear. Similarly, what does a line down the TV screen mean? When a TV is showing vertical colored lines, a loose wire cable in the TV might be the cause. 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.How do I get rid of the red line on my Vizio TV?Remove the cover of the TV and find the ribbon wire that supplies the LCD of your screen. Clean it with a contact cleaner for possible lose contact. Then try to turn on the TV. Most cases lost contact is the cause of that line.

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