Knock or tap on the back of your TV.
If the issue is with cable connections, this could solve the problem.
It could also indicate a problem with your T-Con board.
If it’s your T-Con board, you’ll want tohave T-Con replaced.
Change your TV’s prefs.
This step might work for you if the issue isn’t because of damage.
First, try switching the TV input from different HDMI ports or AV ports.
Doing this can rule out problems with specific inputs.
Run a picture test on your TV.
Take a look at the LCD screen.
If it’s damaged, you may want to get the screen repaired or replaced.
It may be a less costly option than buying a new TV altogether.
If the lines are new, one of these parts was likely damaged.
Connections between TV parts may also get interrupted, causing horizontal lines.
Sometimes this may happen on its own, or if the TV was damaged.
If you’re seeing colored horizontal lines, it may be because of the T-Con board.
Leaving the TV turned on for too long can also cause vertical lines.
The steps for fixing lines on your TV will also work tofix TV glitcheslike flicker and stutter.
For example, check the cables and connectors and ensure there’s no issue with your input gadget.
Tofix screen burn on a TV, adjust the brightness controls and enable pixel-shift.
Sometimes playing a colorful video with fast-moving action for half an hour might help.
