If your Samsung TV keeps turning off every 5 seconds, then you are not alone. In fact, this guide will help you fix it in no time.
I’ve been there, spent hours online trying to find the best approach to fix the issue online to be fed with irrelevant “tips” that actually required my TV to be on for a long time like:
- “Update your software”
- “Check eco-solution configuration”
- “Check Sleep timer configuration”
- “Turn off Anynet + (HDMI-CEC) option”
- “Reset to factory settings”
I mean, why would I have searched for the query ‘my Samsung TV keeps turning off every 5 seconds’ in the first place if I could do all those?
I am not here to tell you any of those.
Instead, I have written this guide to show you the exact troubleshooting procedure that I used to fix my Samsung tizenOS smart TV, coupled with other suggestions that a lot of other users with similar issues.
No time to waste, let’s dive right in!
My Samsung TV Keeps Turning Off Every 5 Seconds
To fix this issue, plug your Samsung TV into another power outlet, check for damage in power cable, ensure there’s no power fluctuation, power cycle the TV, disconnect all external devices attached, check if the TV backlight still works, ensure there’s no overheating and fix power short in board.
1. Plug TV Into Another Power Outlet
When it comes to TVs turning off itself in short intervals, power is the first and most common culprit.
The power cable from the TV may be shaking, and not tightly connected to the power outlet.
Also, the power outlet itself may be faulty, causing partial connection which doesn’t allow the TV cable to be probably plugged.
That said, go ahead and connect your TV to another working power outlet. Also, make sure that the cable is plugged completely and the holes in the outlet hold it tightly.
If this is done and your Samsung smart TV still turns off every 5 seconds, there’s nothing to worry about. Move on to the next troubleshooting tip.
2. Check For Damaged TV Power Cable
Still on the issue of power, the TV power cable may actually be damaged causing your Samsung tizen smart TV to turn off every 5 seconds.
If that’s the case, it can easily cause your Samsung TV to turn off by itself every now and then due to the break in power supply at intervals.
What you have to do here is simple.
Have a close look at the power cable of your TV to make sure there’s no obvious break of the cord. More than that, you can go ahead and feel the cable with your fingers to make sure there’s no internal break despite looking good on the outside.
This can happen if an heavy object (like the television shelf) has been allowed to rest on the cable causing it to break on the inside without no obvious external break.
If there is an issue with the power cable, go ahead and replace it with a working one to ensure that power is delivered to your TV.
You can also test the power cable with another device that’s compatible with it just to be sure.
3. Check If There’s Power Fluctuation
This one is quite simple too.
If there’s a power fluctuation (surge and dip in voltage and current), then it can cause your Samsung TV to keep turning off every 5 seconds.
The idea is simple.
There is a minimum voltage needed to actually power on your TV.
If there is a dip in voltage, the low voltage may not be enough to get Samsung your TV to turn on, even if the LED red light turns on or flashes.
Even if the voltage is too high, it’s not advisable to plug your TV (especially directly without any external circuit breaker or stabilizer) as this can potentially damage your TV.
If you notice a fluctuation in power, turn off your TV and contact the power company to rectify the power issue.
If there’s no power issue also, then it’s about time you carry out a power cycle on your TV.
4. Power Cycle the TV
You can fix so many issues on your TV by simply power cycling it. This includes when your Samsung TV keeps turning off every 5 seconds.
The best part?
It’s very easy to do.
If your Samsung TV keeps turning off every 5 seconds, do these:
- Unplug your TV from power outlet
- Leave it unplugged for 60 seconds
- Press the power button on your TV for 30 seconds (if your TV does not have a power button, you can skip this step).
- Plug the TV back into the power outlet and it should start working normally now.
If that fixed the issue for you, great! Otherwise, move to the next tip.
5. Disconnect All External Devices
If you have devices that are connected to your smart TV like streaming devices, gaming console, TV and USB sticks e.t.c, they could be responsible for this. It could also be the reason why your Samsung TV turns off when HDMI is plugged in.
Make sure you disconnect all these external devices that are not needed to power on or use your TV alone.
This is also where Anynet+ comes in (no, I am not going to tell you to disable it since you can’t even get to settings menu in the first place).
Anynet+ is the brand name used by Samsung for HDMI-CEC. It has many features serving several purpose.
In our case, when an external device such as a PS5 gaming console is attached and turned on, this feature when enabled can automatically turn on the TV.
The same way, if a malfunctioning external device is attached to your Samsung TV, it can cause your TV to turn off itself once the HDMI cable connecting the device to your Samsung TV is plugged in.
But, this only happens when the device is connected to your Samsung tizenOS TV and turned on.
Since you probably can’t disable Anynet+ from your Samsung tizen smart TV, what you can do is disconnect these devices so they don’t mess up with your TV.
6. Remove Batteries from TV Remote
If your Samsung TV keeps turning off every 5 seconds, then your TV remote controller may be firing a signal to turn off your TV.
One or more keys on your remote controller may be stuck causing it to “press itself”. If it is the power button in this case, you know what to expect.
So, quickly take out the batteries in your TV remote controller and restart your TV.
If your TV starts working normally, then the issue is obviously coming from the TV remote controller.
But, that doesn’t mean that your remote can’t be fixed.
Open it up, clean wipe out any dust inside it and close it back. Finally, press all the buttons on the remote controller a number of times (while the batteries are still out) to make any stuck button set back into place. That should get the issue from the remote controller fixed.
7. Check If TV Backlight Still Works
A faulty backlight may actually cause your TV to go blank as soon as you turn in on.
While the TV is actually on, there is no sound nor picture which makes it look just light when it’s off.
Hence, it’s worth checking if the TV backlight is still functional.
How to check?
- First, make sure your TV is plugged into the power outlet and you have pressed the power button the normal way you get it to turn on
- Next, point a flashlight to your TV screen (you can also move it around the screen),
If your TV backlight is working well, all you should see is the reflection of the flashlight and yourself.
However, if you can see dull or clear images on the screen while pointing the flashlight, then your TV backlight is defective.
If defective, the backlight can be fixed by replacing the led strips on the screen. If you can’t fix it yourself, go ahead and give it to an expert. At least, you know what you are dealing with.
8. Heat Up TV Through The Vents
If your TV is not turned on for many weeks or even months, the capacitor may start to discharge or even change capacitance. The normal way to fix it will be to change the whole board, which is quite costly.
This issue with capacitors can cause your TV to shut down within 5 seconds of turning it on.
The good news?
You can fix it in just 1 minute without even splitting your TV open or paying so much money to an expert!
All you need in this case is an hot air blower (like heat gun or hair dryer).
NOTE: I totally understand if you doubt this trick at first (in fact, I expect you to), but it has worked for a good number of people that had the same issue where the TV kept turning off every 5 seconds.
I will also explain why this tricks works, plus a video demonstration below.
First, let’s look at how to do it.
- Make sure your TV is plugged in and turned on even if it keeps restarting.
- Next, aim the hot air blower at the TV opening/vent (usually under the TV, and sometimes at the back or sides of the TV) for 30 to 60 seconds.
- Now, go ahead and power off the TV, then turn it back on.
And here’s why it works:
Other than what I explained earlier about capacitors, most components on the board are quite sensitive to cold environment. Routine use of your TV can help keep these components warm every now and then.
When not used for a long time or exposed to cold weather, these components start to suffer. Most capacitors for example suffer from this for sure.
This is why heating it up gets it to work again.
You can see a video demonstration below:
This particular fix also applies if your Samsung TV won’t turn on at all.
9. Check Hardware Connections
Faulty or bad hardware connections can cause your Samsung TV to turn off every 5 seconds, especially the ones that are responsible for pictures/videos getting displayed on your screen.
I am talking about HDMI cable, or any other type of cable used on your TV responsible for display especially. This can also cause your Samsung TV to turn off when HDMI is plugged in.
Even Samsung recommends that you use only a premium certified HDMI cable. If you use an uncertified HDMI cable, the screen may go blank making it appear as if it has shut down.
That said, go ahead and replace your HDMI cable with a good certified one.
If you use other types of cables like coaxial cable or RCA (Yellow, Red, and White) cables, go ahead and change those too.
10. Make Sure TV Isn’t Overheating
Overheating can cause a lot of damage to the TV, including your TV turning off every 5 seconds.
Poor ventilation and fault built-in coolant system are the most obvious causes of overheating
First, you want to make sure that the vents are not closed or obstructed. Also, you want to place in a place that allows proper airflow to make it function properly.
In addition, allow the TV to cool down if it has been used for a long time under poor ventilation.
After about an hour, try to turn on the TV and see if the issue persists.
11. Fix Power Short in the Board
This one is a bit technical compared to the earlier suggestions (also why it’s lower in the list).
However, if you are grounded for some little technicalities, you can find your way around this with the help of the video below.
First, let me explain what this is about.
There is a cable that connects from the power supply board to the main board in the television. It has a number of cables, including the PWM BLU.
In simple terms, Pulse Width Modulation (PWM) is responsible for dimming of backlight by changing the perceived and actual brightness. It does this by pulsing the power to the LED on and off.
If the wrong signal is sent due to fault in other parts of the board (which might be way costlier to fix), it can pulse the LED to turn off which dims your screen or even make it go totally blank.
Hence, what we will do here is to disconnect the PMW BLU cable temporarily. Then, you go ahead and reset the TV from the TV settings. Once that’s done, you can connect the PMW BLU cable back and everything will still be working perfectly well.
The video below will guide you:
12. Inspect for Damage in the Boards
Another thing you can do is inspect for visible damages in the boards (main board and power supply board) such as:
- Faulty power board
- Faulty capacitors
- Blown fuses
If you don’t know how to do these, go ahead and request for technical help.
13. Contact Samsung Support
If you are still under warranty, then you can get your TV fixed at no cost. You can also get help from Samsung support even if your TV is out of warranty. Otherwise, you may have to get a new TV.
There are so many things can can cause your Samsung TV to turn off every 5 seconds. To fix this, do the following:
- Plug TV into another power outlet
- Check for damage in TV power cable
- Be sure to check for power fluctuation
- Power cycle your TV
- Disconnect all external devices (console, streaming devices e.t.c)
- Remote batteries from TV remote controller
- Check if TV backlight is still functional
- Blow warm air into TV for 30 seconds through the vents
- Check all hardware connections
- Make sure TV is not overheating
- Fix power short in the board
- Inspect for damages in the main board and power supply board
Finally, you can contact Samsung for technical support.
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