How to Fix a Samsung TV Flashing Blue Screen

A Samsung TV flashing a blue screen can be caused by a loose HDMI connection, a loose power cable connection , or a defective main control board. To fix this issue, try checking and tightening all the connections, replacing the HDMI cable, or replacing the TVs main control board.


Possible Causes of Samsung TV Flickering Blue Screen

Possible causeSolution
Mainboard FailureMalfunctioning or failed mainboard, responsible for processing signals
Power Supply FailureFailing power supply, responsible for providing voltage and current
Loose ConnectionsLoose connections between TV and connected devices can cause flickering
Firmware IssuesFirmware issues can cause flickering or blue screen, try updating firmware
Faulty HDMI CableA faulty HDMI cable can cause signal to flicker or cut out
Electrical InterferenceOther devices in your home can cause electrical interference and flickering

There are several possible causes of a Samsung TV flickering blue screen when turned on. Here are some of the most common causes:

Read also: Samsung Soundbar Remote Not Working [Fixed]

Mainboard Failure

The mainboard is the component responsible for processing video and audio signals in your TV. If the mainboard is malfunctioning or has failed, it can cause a variety of issues, including a flickering blue screen.

Power Supply Failure

The power supply is responsible for providing the necessary voltage and current to power all the components in your TV. If the power supply is failing, it can cause your TV to flicker or turn off randomly. 

A short in the low voltage rail from the power supply that feeds the mainboard can also cause the TV to flicker blue screen. A short circuit can occur when there’s a break in the circuit, causing the power to flow erratically and damaging the components of the TV.

Loose Connections

Loose connections between the cables that connect your TV to the devices you’re using, such as cable boxes or game consoles, can cause flickering or distorted images on your TV.

Firmware Issues

Sometimes firmware issues can cause your TV to flicker or display a blue screen. Updating the firmware on your TV can help fix this issue.

Faulty HDMI Cable

If you’re using an HDMI cable to connect your TV to a device, a faulty cable can cause the signal to flicker or cut out. Try replacing the HDMI cable with a new one to see if this fixes the problem.

Electrical Interference

Electrical interference from other electronic devices in your home, such as microwaves or cordless phones, can cause your TV to flicker or display a blue screen. Try moving these devices away from your TV to see if this helps.

Understanding the possible causes of a flickering blue screen on your Samsung TV can help you troubleshoot the issue and fix it quickly. Keep in mind that some of these issues may require the help of a professional TV repair technician, especially if you’re not comfortable opening up your TV or working with electronics

Read also: How to Reset A Philips TV Without a Remote

Troubleshooting Steps to Fix Samsung TV Flickering Blue Screen

If your Samsung TV is flickering blue when turned on, there are several troubleshooting steps you can try to fix the problem.

Power Cycle the TV

The first step is to power cycle your TV. This involves unplugging the TV from the power source and waiting for a few minutes before plugging it back in. This can help reset the TV and clear any temporary glitches that might be causing the problem.

Check the Power Supply

If power cycling doesn’t fix the problem, the next step is to check the power supply. You can do this by opening the back cover of your TV and inspecting the power supply board for any visible signs of damage or burn marks. If you notice any damage, you may need to replace the power supply board.

Disconnect the Mainboard

Another troubleshooting step is to disconnect the mainboard from the power supply to see if it’s causing the problem.

You can do this by opening the back cover of your TV and unplugging the cable that connects the mainboard to the power supply. If the TV stops flickering or turns on normally, the mainboard is likely the culprit.

Replace the Mainboard or Power Supply

If the above steps don’t fix the problem, you may need to replace the mainboard. A Samsung TV main board will typical cost around $100. If you will have to replace the main board yourself, this will save you around $200 in labor.  If you decide t go for professional services you might like to visit online service such as

Final  thoughts

In conclusion, if your Samsung TV is flashing blue when turned on and you have ruled out other possible issues outlined in this guide this is mainly  due to a malfunctioninng main control board.

A common fix that works is replacement of the main control board.

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