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White Line Across TV Screen (Causes, How To Fix)

As a TV owner, I was recently frustrated to discover a white line across the screen. I was determined to figure out what was causing the problem and how to fix it. After doing some research and testing out a few solutions, I’m here to share what I’ve learned and the solutions I’ve discovered. In this blog post, I’ll be discussing the causes of a white line across a TV screen and how to fix it.

Most of the time, white lines across a TV screen are caused by damaged parts that produce the TV’s display. These can be issues with the LCD panel, row drivers, or T-con board. White lines may also appear if a TV is connected to other devices via cables.

White lines across a TV screen are usually caused by:
– Damaged parts that create the TV’s display
– Faulty cables
– Water damage
– Issues with the T-con board
Troubleshooting steps:
– Check all cables are correctly fitted and aren’t loose
– Switch the TV off and on again
– Update the software on your TV
– Reset your TV’s factory settings
– Switch between sources
If these steps don’t work, it may be necessary to:
– Take the TV to a repair center
– Replace a damaged part
Preventive measures:
– Dust your TV regularly
– Switch off the TV when not in use

What Causes White Lines Across A TV Screen?

Most often, white lines are caused by damage to your TV or faulty cables. In addition, as TVs get older, they may start losing some functionality.

The best way to eliminate the white lines across your TV is to troubleshoot what could be causing it. 

A few common reasons why your TV displays white lines include water damage, screen damage, loose cables, and connecting to other devices.

Depending on your situation and the types of TV you have, some of these may not be applicable but should be ruled out if you want to fix the white lines across your TV.

The most typical reasons why your TV is displaying white lines across the screen:

The TV Screen Has Water Damage

If your television screen has been exposed to water, it will cause damage to the screen and other components in your TV.

For example, this can happen when cleaning your TV with a wet cloth or an accidental water spill. 

If you wiped your TV screen while your TV was on, you might have caused your TV to short circuit, damaging the screen.

LED Screen Is Damaged

If your TV has been moved around, dropped, or accidentally knocked, you may have damaged the LED panel in your TV. If this panel is damaged, there will be issues with the image display.

TV Connector Cable Is Loose

The connector cables at the back of the TV can make white lines appear if they aren’t connected properly.

Ensure that all cables are connected; disconnecting and reconnecting cables are recommended to help solve this problem. If the cable is faulty, you’ll be able to tell by disconnecting and reconnecting it.

Damaged Or Broken T-Con Board

If the T-con board is damaged or broken, it severely impacts the quality of the image displayed, including having white lines across the screen.

To test if the t-con board is damaged, you can lightly tap on the back of your TV; if the lines disappear, you know it’s the T-con board.

If there are issues with the t-con board, it usually needs to be replaced with a new one.

Rust Damage In The LED Frame

If your LED frame is rusty due to moisture build-up over time, it can cause white lines to appear on your TV. The best way to solve this is to purchase another LED frame.

No Downtime For The TV

Having your TV on all the time can seriously damage its display. Besides your TV getting hot and overworked, the electrical components are working very hard.

They could get damaged with the constant usage. Just like computers and cellphones need to be switched off from time to time, your TV must also be switched off when you aren’t using it.

Connection To Other Devices

You may see white lines if your TV is connected to other devices like a laptop. This could be due to the cables connecting the two devices.

If you disconnect the devices from your tv and reconnect, you may resolve this issue. If not, you could either get another cable if it’s a faulty cable or avoid connecting other devices to your TV.

Dust And Debris

Dust and debris can quickly accumulate behind the screen of your TV. This can affect the display of your TV and the inner components too.

Dusting and cleaning your TV is the best way to prevent dirt from accumulating. If you do notice dust at the back of your TV and have experience with TVs, you could open it up and remove all the dust.

Damage Or Problems In The Graphic Hardware

Faulty or damaged graphics can display white lines across the screen. Some TVs are more likely to have this problem compared to others. While this isn’t the most common reason white lines are displayed across a TV, it should be considered.

How To Fix White Lines Across A TV Screen?

If your TV has recently displayed and started displaying white lines across the screen, there may be an easy solution to get it working again.

However, there are a few reasons why this could happen, and if it can’t be fixed, you may need to get a TV repair man to assist or take your TV to a repair center.

Here’s a list of the common problems that cause white lines to appear across your TV and their solutions:

Solutions For White Lines Across TV Screen
ProblemHow To Fix It
The tv screen has water damageSwitch off your television, then proceed to dry the TV.If the problem persists even once the TV is dry, you may need to replace all the damaged components 
The LED screen is damagedUnfortunately, replacing the entire LED panel
is the only way to fix this.The TV connector cable is loose.Disconnect and then reconnect the TV cables making sure everything is plugged in correctly
Damaged or broken T-con boardIf there is a problem with the T-con board, the best would be to replace it.
Rust damage in the led frameReplace your current LED frame with a new LED frame
No downtime for the tvSwitch off the TV when you are not watching anything or using it
Connection to other devicesDisconnect cables and other devices. The white lines should disappear
Dust and debrisMake sure you dust regularly and keep your TV as clean as possible
Damage or problems in the graphic hardwareDepending on what the problem is with the graphics, you may be able to use replacement parts, or you may need to take it in to get repaired.

Tips For Solving White Lines On A TV

If you’re unsure how to determine the cause of the white lines across your TV, there are tips for troubleshooting this problem.

  • Check all the cables are correctly fitted and aren’t loose
  • Switch the TV off and on again
  • Update the software on your TV
  • Reset your TVs factory settings
  • Switch between sources
  • Disconnect devices and reconnect them again
  • Look for signs of a short circuit
  • Search the web for solutions specific to the make and model of your TV

Try a soft reset

A soft reset, is where you turn off the TV and unplug it from the wall outlet. You then usually have to wait for 60 seconds then you can put the plug back in and turn the TV on again. Performing a soft reset clears a device’s internal memory of running programs, which often clears up any technical glitches.

Try a hard reset

A hard reset involves completely resetting the TV to its factory defaults. Most TV models have specific instructions. However, if you have a Samsung TV here are the steps to follow:

To perform a factory reset:

  1. Head to Settings > General.
  2. Select Reset.
  3. Enter your PIN > then select Reset.

Note: If you didn’t change your PIN initially


Your TV can regain its perfect image display by using a few fixes to eliminate white lines across your television screen.

While a few common reasons cause white lines to appear on your TV, you should also refer to the manufacturer’s guidelines and recommendations for a solution specific to your TV.

Read more: What to do if you lost your TV remote