How to Fix Samsung TV Flickering Black Screen

A flickering black screen is a frustrating issue that can affect Samsung smart TVs. This problem causes the TV display to flash on and off, show momentary blackouts, or display a black screen for brief periods.

What Causes the Flickering Black Screen on Samsung TVs?

  • Several potential factors can contribute to this flickering screen problem:
  • Faulty or loose HDMI cable connections. Damaged HDMI ports or cables can interrupt the video signal.
  • Power source issues like power surges or inconsistent electricity. This can disrupt the power delivery to the TV.
  • Outdated, corrupt, or buggy firmware. Software issues can manifest in display problems.
  • Incorrect picture or video settings. Wrong configurations like brightness can affect the display.
  • External device incompatibility. Problems with input sources connected to the TV via HDMI.
  • Hardware malfunctions. Defective components like LED backlights can develop faults.
  • Excessive heat build-up. Overheating can damage the display panel or internal hardware.

Fix Samsung TV Flickering Black Screen: Troubleshooting Steps

Here are 10 troubleshooting tips to resolve the blinking black screen issue on your Samsung TV:

1. Power Cycle the Television

Start by power cycling the TV. Unplug the power cord from the outlet, wait 1 minute, then press and hold the power button on the TV for 30 seconds. This discharges any residual electricity. Leave the TV unplugged for 5 minutes before plugging it back in. Power cycling resets the TV’s internal components and often fixes glitches.

2. Inspect All Connections and Cables

Examine the condition of all cables connected to the Samsung TV, including the power cord, HDMI cables, component cables, etc. Check for any damage, like frayed wires or bent plugs. Make sure cables are securely inserted into the ports on both ends. Try using a different HDMI cable and connecting it to another HDMI port on the TV. Faulty cables are a common cause of flickering screens.

Samsung TV Flickering Black Screen

3. Test Different Devices and Input Sources

Connect other external devices like gaming consoles, DVD players, cable boxes, etc., and test them on the TV to determine if the flashing black screen only occurs with a specific source device. This narrows down whether the TV or the external device is causing the issue.

4. Perform a Self-Diagnosis Test

Use the built-in self-diagnosis function on your Samsung TV to run tests that can detect issues with the display, HDMI ports, and firmware. Go to Support > Device Care > Self Diagnosis on the Settings menu and select tests like Picture Test, HDMI Troubleshooting, Signal Information, etc. Review the diagnostic test results and error codes.

5. Disable Energy Saving and Eco Modes

Turn off Energy Saving mode and Eco features like ambient light detection. These settings adjust screen brightness based on environmental lighting conditions, which can sometimes contribute to a flickering display. Disable these modes and see if it stops the flickering.

6. Reset the Picture Settings to Default

Reset all picture settings, like brightness, contrast, color, sharpness, etc., to their factory default values. Navigate to Picture > Expert Settings > Reset Picture on the TV’s settings menu. Incorrect or changed picture settings are a possible cause of display issues.

7. Update the TV’s Firmware

Install the latest firmware update from Samsung to rule out bugs as the culprit. Go to Support > Software Update > Update Now from the settings menu to check and install updates. Firmware updates often resolve display glitches and improve performance.

8. Perform a Factory Reset on the TV

Back up your apps and settings, then factory reset the Samsung TV. This will erase all custom configurations and revert the television back to its original out-of-the-box state, which can eliminate display issues caused by incorrect settings.

9. Try Adjusting HDMI Black Level Settings

If the flickering only happens when an external device is connected via HDMI, try adjusting the HDMI Black Level setting under External Device Manager in the TV’s settings. Toggle between Low, Normal, and High to see if that corrects the flickering.

10. Contact Samsung Support

If you still cannot resolve the flickering black screen, contact Samsung Support via their website, email (, or call them at 1-800-SAMSUNG. Explain the issue in detail and your troubleshooting steps. Samsung can provide specialized support tailored to your specific model.

Properly diagnosing and fixing a flickering black screen issue requires patience and a systematic approach. Follow these troubleshooting tips one by one until you isolate the cause of the problem. With consistent testing and analysis, you should be able to resolve the Samsung TV’s black screen flickering.

Frequently Asked Questions

Q: Why does my Samsung TV screen keep flickering?

A: Flickering screens on Samsung TVs are usually caused by a loose cable connection, HDMI port issues, faulty T-CON board, bad LED driver, or power supply failure. Rule out external factors first before investigating hardware failures inside the TV.

Q: How do I stop my Samsung TV screen from flickering?

A: Try power cycling the TV, checking all connections, installing firmware updates, factory resetting the TV, adjusting HDMI Black Level, disabling Energy Saving mode, resetting picture settings, and performing self-diagnosis. One of these troubleshooting tips should stop the flickering.

Q: What does a black flickering screen mean on a Samsung TV?

A: A flickering black screen indicates an interruption in the video signal getting to the screen. This disruption can be caused by hardware faults or software issues. Methodically test different components to isolate the root cause.

Q: Why are my Samsung TV flickering lines?

A: If you see flickering lines on the screen, it likely indicates a faulty T-CON board inside the TV. The T-CON board controls the signal to the screen. Have a technician inspect and replace the T-CON board if needed.

Q: How do I fix the vertical lines on my Samsung TV screen?

A: Vertical lines point to problems with the T-CON or LED driver boards. Check cable connections first. If lines persist, these internal components may need replacement. Professional repair is recommended.

Q: What does it mean when my Samsung TV screen is green?

A: A green-tinted screen means there is an issue with one or more of the LCD panel’s RGB color pixels. This requires professional repair to diagnose and replace the faulty LCD panel inside the Samsung television.

Q: Why is my Samsung TV screen flashing different colors?

A: Flashing multi-colored lines or dots indicates failure of the LCD panel’s transistor layers. The LCD panel will need to be replaced to fix this problem permanently.

Q: Why is my Samsung TV screen black, but the sound works?

A: If sound works, but the Samsung TV screen is black, it could be a backlighting, LED driver, or T-CON board failure. Try a hard reset first; otherwise, professional repair is needed.

About: Pankaj Konwar

Pankaj Konwar is the founder and writer of 5GMP. He writes in-depth buying guides, tips for troubleshooting common TV problems, and reviews of the latest TV models.

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