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Why is there a Green Line on My Samsung TV?

As an owner of a Samsung TV, I have found myself becoming increasingly frustrated with the appearance of a green line on my screen. After some research and testing, I’m here to share with you how I solved this issue and the other solutions I discovered to help you get rid of this pesky green line.

The green line that appears on the sides of your Samsung TV is something known as overscan. This is the overscan line that shows up when a broadcast, movie, or TV show doesn’t have enough information to fill the entire screen. You can fix this by setting the resolution of your TV to 16:9 or adjusting the image size to fill the entire screen.

Issue / SolutionDetails
Green LinesOften due to overscan
Fix Overscan LinesSet the resolution to 16:9 and increase the image size
Green Lines Across the PicturePossible reasons: outdated firmware, broken panel, poor cable connections, incompatible image resolution
Fix Green Line on Samsung TV1. Adjust resolution to 16:9
2. Increase image size
3. Turn off the TV for 30 seconds
4. Try a software update
5. Perform a soft reset
6. Perform a hard reset
7. Run a picture test

Why is there a Green Line on My Samsung TV?


Every Samsung TV has a feature known as Just Scan or Screen Fit. This is useful for ensuring that images fill up the entirety of the screen without having black spots that don’t have any visual information.

However, if a broadcast or a movie doesn’t have enough information to fill the screen, you’ll start to get these green or black lines at the edges of the frame.

These are known as over scanlines. This is simply your TV’s way of filling out the information that’s missing from the broadcast that you’re watching. These lines are perfectly normal and are not a sign of your TV being broken or damaged.

It’s worth pointing out that overscan lines can be black, white, or even static, in addition to being green.

The color of the overscan line doesn’t signal any different problem. It still all comes down to adjusting the image size on your screen and setting the resolution to 16:9.

How Overscan Works And Why It’s Actually Good

The core of this issue on Samsung TVs is a feature known as Screen Fit or Just Scan. This attempts to fit an image to the resolution that you sat on your monitor.

This allows you to watch videos that would otherwise be far too small to fully enjoy on a large Samsung television.

Those overscan lines are simply what your television does when it doesn’t have any information to fill the blanks.

In the same way that playing an album on a record player will sound wrong if set to the incorrect speed, footage on a television will look wrong if set to an incorrect resolution.

Screen Fit and just scan help you enjoy content on your full-size Samsung TV, but it might also require you to adjust the resolution and image size to get rid of those overscan lines.

If the green lines are going across the picture

If there are green lines going across your Samsung TV that clearly should not be there, it it could be due to the following reasons:

  1. Outdated Firmware
  2. Broken Panel
  3. Poor Cable Connections
  4. Incompatible Image Resolution

How to Fix the Green Line on My Samsung TV?

Fixing over scanlines is about knowing what has caused them. The most obvious fixes are going to be adjusting your screen to a 16:9 resolution and then increasing the image size until it fills up the entire screen.

Green lines that appear inside of the image itself rather than on the edge could be a sign that your TV is experiencing a signal problem and needs to be turned off for 30 seconds while you check all of the connections.

Fixing Overscan Green Lines On a Samsung TV

Fixing the overscan lines on a Samsung TV is simple and easy. All you need to do is set your resolution to 16:9 and then increase the size of the image so that it extends just beyond the edge of the television.

This will force all of those over scan lines outside of the visual field so you can enjoy your favorite movies and TV shows without any intrusive lines on the edge of the frame.

Fixing Green Lines Caused By Signal Problems and Glitches 

If your green lines are showing up inside the image, there’s a good chance that your Samsung TV is experiencing a connection problem.

The first step to fixing these is to turn off your Samsung television and leave it off for 30 seconds.

While your Samsung TV is off, you should check all physical connections to ensure that your TV is securely plugged in and nothing is getting in the way of your connection.

Try a software update

There is a possibility that there is a software bug causing the issue. You can turn on automatic software updates by going ”settings” then ”support” then “software update” and ensure ”Auto Update” is turned on. Alternatively, you can manually update over the internet by clicking ”Update now”.

Try doing a soft reset

Often, a soft reset is all that is needed to solve issues on a Samsung TV. A soft reset does not erase any data. To soft reset a Samsung TV, you simply need to turn the TV off, then remove the plug from the wall outlet and wait for 60 seconds, then put the plug back in and turn the TV on again.

Try a hard reset

A hard reset involves completely reseting the TV to its factory defaults and your data will be erased.

To do this, do the following:

  1. Turn on the TV and press the “Home” button on the remote
  2. Go to “settings”
  3. Then click “general”
  4. Then click “reset”
  5. You must then enter a 4 digit pin number which is 0 0 0 0 by default
  6. Then click ”Yes” to reset the TV
  7. The TV will then turn off once it has finished resetting
  8. You can now turn the TV back on and set it up again

Do a Picture Test

A picture test is a self-diagnostic process that allows the TV to identify the problem and find a suitable solution. 

To do this, do the following:

  1. Press the “settings button”
  2. Go to “Support”
  3. Go to “Device Care”
  4. Go to “Self diagnosis”
  5. Then click “Picture Test”

Read more: find 4 digit code on Samsung TV