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Why Is There a Black Line On My Samsung TV?

As an owner of a Samsung TV, I have recently been faced with a frustrating issue: a black line running down the side of my screen. After doing some research and testing, I have been able to identify the cause of the problem and also come up with some solutions.

In this blog post, I will share my experience and discuss what I did to solve the issue, as well as other solutions I discovered.

Quick Tips for Fixing Black Lines on Samsung TV
– Outdated firmware, broken panel, poor cable connections, or incompatible image resolution could be the cause of black lines on a Samsung TV.
– Various types of black lines can appear on a Samsung TV, including wavy, straight, vertical, and image-stacked lines.
– Check and replace your cables, try a software update, do a soft reset, try a hard reset, and consider a picture test to fix a black line on a Samsung TV.
– If necessary, replace the screen.

Why Is There a Black Line On My Samsung TV?

A black line on your Samsung TV shows a problem with your device. It could be related to a tab error, wrongfully fixed cables, or image resolution incompatibility. In short, the problem could arise from a poor connection or a processing issue.

An outdated firmware or a broken panel could also be why this black line is on the screen. The following are insights into each of these causes.

Outdated Firmware

Samsung TV requires you to update its firmware or software from time to time. While this aspect is assumed to be automated, there are instances when you need to do it manually.

Suppose this firmware gets outdated for a significantly long time. In that case, expect the TV to have a strange horizontal or vertical line across the screen.

Usually, the most critical firmware are graphic drivers and system software. An outdated graphic driver will not process the latest high-resolution images you desire. It could also fail to stream or process any image at all.

Broken Panel

Suppose your TV screen gets broken or damaged. In that case, it will be hard to process or transmit the images.

Ideally, a broken panel implies that the gate driver will have failed. However, it will be fair to mention that some cracks might not affect image transmission.

For instance, your TV will offer an excellent view if the outer screen is damaged. This screen is often used for protection.

However, breaking the inner layer means that the TV will start bleeding. In this case, LEDs will start affecting each other, causing the line on the device.

Poor Cable Connections

Poor cable connections will often result in vertical lines on your Samsung TV. This improper connection makes it difficult to process images between the processing board and the panel.

Remember, this cable could be improperly fixed, faulty, or corroded.

Take the time to inspect the cables and ascertain their health. Corroded wires are likely to be expected in areas with extreme temperature swings.

You could also witness this element in regions with high humidity. In such instances, remove the cables and clean them accordingly. You could also replace them with newer options.

Incompatible Image Resolution

Incompatible image resolution often happens when the image size is different from the actual TV resolution.

Whether the image is bigger or smaller than the resolution, expect a significant difference on the screen. The line could be either vertical or horizontal.

What Types of Black Lines Can I Get On My Samsung TV?

Your Samsung TV is susceptible to different black lines, including wavy, straight, vertical, and image-stacked lines. Each line represents something. Here is what each option indicates.


You could also refer to them as moving lines. These lines usually indicate a poor connection, whether from a signal or your cables.


These lines are stationary. They indicate a problem with the internal work of your TV. This internal issue could be anything, from firmware to system errors.

Vertical Lines

You will expect vertical lines if you have a poor connection. This problem could also arise if the cables are faulty or corroded.

Multiple Images on Stacks

You can also witness multiple images stacked on top of each other. This element is called ghosting.

It shows that various internal parts are not functioning accordingly in most cases. Yet, you could also experience it if there is a bad connection.

How to Fix a Black Line on a Samsung TV

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Various steps go into fixing black lines on your Samsung TV, including cable changes, firmware updates, and screen replacement.

Understanding when to consider each option will cushion you against financial constraints in the long run. Notably, we look at a few insights into when and how these options suffice.

Check and Replace Your Cables

When fixing black lines on your Samsung TV, your cables are the biggest culprits. These cables need to be seated appropriately, ensuring that you get the connection you deserve.

Proper seating ensures that the image clarity is stable and high-quality. There will also be no need to worry about black lines on the screen.

Cable replacement is quite common in specific areas. High humidity and extreme temperatures in some regions often make your cables corrode much sooner. For this reason, inspect your wires from time to time.

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

Consider 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”

Replace the Screen

Sometimes, the black line on your screen indicates that the TV is damaged or broken. In such instances, you will need to replace the screen.

However, it would be best to procure it from a reputable Samsung dealer. A genuine Samsung screen will likely last long, giving you value for your money. You will also be sure of no compatibility issues.

Black lines are pretty standard on Samsung TVs. They denote specific issues, including connection problems and software updates.

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The insights above ensure that you understand how to deal with each problem effectively.