Samsung TV turns off and on

Samsung TV turns on and off by itself

Having made a simple diagnosis of your TV and performed basic manipulations, you are likely to cope with the problem without going to the service center.

We suggest you to disassemble the most obvious causes and the simplest ones to fix by yourself.

The problems can be external or internal. If you don’t have minimal skills, it’s best not to tamper with the internal device.

The problem is in the outlet

The cause of malfunctioning TV can also be a trivial problem with the electrical outlet, cable or power adapter. You must follow safe electrical practices.

  • Examine all plugs, connectors for mechanical damage.
  • Determine if the power cord is kinked, bent, or punctured.
  • Inspect the plug for dark spots or charring.
  • Check that the plug is tightly inserted into the outlet.

If any of the above conditions exist, the damaged equipment must be replaced: the outlet, cable, adapter, plug, etc. ะด.

serious problems

If the TV turns on and off by itself, this can be a more serious problem. How such a breakdown looks like, the cause of which lies in the device itself, you can see here:

It happens that the duration of the technique depends on the frequency at which the signal is received. This means that when one channel is activated, there is no spontaneous shutdown until the switch to standby mode. On the other channel, the TV works for a short time and shuts down every 2-3 minutes.

The most common causes of a TV set turning on and off at once can be

  • Glowing dust on the surface of the board;
  • Regular power surges;
  • Problems in the power supply circuit of the inverter;
  • software failure.

Because of the above mentioned any device suffers, TV set as well. Let’s take a closer look at the causes that cause the TV to turn on and then turn off.

After what time the malfunction appears

Pay attention to the time when the TV turns off. You turn on the TV (it has been off for a long time) and then the TV turns off. Possible Options:

After first switching on, TV set operates normally for a short period of time, and then it starts to turn on and off.If the TV stays on for a while after first powering on, it is likely that the electronic components are faulty and unstable after heating up.TV turns off right after turning on.Defective electronic components in the power supply, main board, WI-FI module, screen matrix. Some TV components are not stable. High power consumption is possible, it triggers the overload protection in the power supply. Electronic components malfunction.

In all of these cases, the TV needs to be repaired by a specialist.

Why Samsung TV turns on and off by itself and what to do about it

The spontaneous action of technology has always been considered a bad sign. Any action not caused by a person indicates possible problems with the device.

In the case of such complex devices such as televisions, there are not many reasons for turning the device on or off on their own. They can be divided into two categories:

  • Hardware. the cause is in the electronics or power elements;
  • Software. the TV is set in such a way that it is forced to turn off (the reason could be a problem with the firmware or a configured sleep timer).

Common causes and their solutions

To understand what to do if your Samsung, LG or other TV turns on and then immediately or after a certain period of time turns off, you can only find out the cause of the phenomenon. On it and depend on further action that will need to be taken to correct the problem. The first thing to do is to find out why the TV turns off on its own, so the most important part of the measures is to properly diagnose.

Let’s look at common causes of problems when a Samsung or other receiver turns on and off by itself, and solutions that are effective in specific situations.

Broken keys

One of the most common causes of spontaneous turning on and off is a broken power button. The turning off can follow immediately after you turn your TV on. Jamming, popping buttons and other irregularities in pressing signals that the part needs to be replaced.

A stuck Power button on the remote control can also be the cause of the problem. Usually sticking or irregular key response is due to dirty contact surfaces, but sometimes the problem is mechanically related. In the first case it is enough to disassemble the control unit and clean the contact elements with alcohol, in the second case the problem can be solved by re-soldering the contacts on the board. Sometimes it can be a malfunction of the infrared sensor.

Repair requires special skills, so if you don’t have them, you’ll need help from a specialist. Alternatively, you can buy a new remote control unit, which in some cases is cheaper than repairing the old one.

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Power surge

Power surges are one of those factors that lead to a variety of equipment problems, including the phenomenon where the receiver turns on and off by itself at once, or after a certain period of time.

Power surges and sags are quite common in homes with old electrical wiring and can even contribute to the rapid failure of the device. If possible, it is better to replace the wiring, which will be good for all devices in the house. Another, less expensive solution can be a purchase of a voltage regulator or an uninterruptible power supply unit, and it is not necessary to buy a powerful device, a budget model will be enough for voltage compensation, since for the most part modern TV sets do not consume up to 100 W.

Sleep timer

A common reason why a Samsung TV turns off by itself is an activated sleep timer, and not necessarily intentional and not always by you. You can turn off the function in the Smart TV settings by using the remote control to go to the “Turn off timer” section. If necessary here you can set another time of shutdown or deactivate the option.


In the case of “smart” devices software errors are often the reason why the TV turns on and turns off right away. It can be a consequence of an update, incorrect firmware or incorrect factory settings. You can change the settings, roll back to a previous version of the firmware, if the problem appeared after updating, or perform a manual system update. You need to download the current version of the software from the manufacturer’s official web-site, then load the distributive onto a USB-flash drive or some other storage, connect it to the TV receiver, and run the installation process. Once the installation of the system and drivers is complete, the TV will restart, and if the problem was an incorrect firmware, it will be solved.

If the “Auto Power Off” function is activated in the device settings, deactivate it. Some programs can also control the time of shutdown, so review recently installed software and remove questionable.

Dust and Moisture

Don’t underestimate such a serious enemy as dust. Although it is not considered to be conductive in itself, it forms a buildup of dirt, and even worse, in tandem with moisture, can lead to a short circuit of the contacts on the board and overheat, burning out semiconductor components. For this reason, it’s not uncommon for a TV receiver to turn off just seconds after you turn it on, regardless of whether it’s an old kinescope model or a modern one.

In the case of dust deposits, the problem is solved by cleaning, which is easy to do at home with a vacuum cleaner and a small brush. To remove accumulated dust, you will need to remove the back cover of the device.

Moisture has a detrimental effect on internal components, resulting in consequences such as short circuits, oxidation of contacts and burnout of modules. To fix the problem you will need to use a soldering iron to remove the oxide on the contacts and solder them again. Repair the board tracks by soldering or bridging them with fine wire. We do not recommend this procedure to be carried out without prior skill.

Problems with the power supply circuit

Another common reason why your device hangs up after a few seconds, or does not turn on at all, is that the cable or socket contacts are damaged. It is easy enough to check this by shaking the power cord and the plug in the socket. If a problem is detected (the device responds by switching on and off), you should connect the device to another outlet, thus determining which of the elements needs to be replaced or repaired. An external examination of the cord is necessary, although it is not always possible to visually detect damage. If there are any breaks or other defects, it should be replaced.

Why the TV turns on and off by itself

The TV turns on by itself. Malfunction is often inherent in modern models because of the software, including TVs from reputable manufacturers. This problem is not peculiar to CRT TV sets, but sometimes it is related to them. The problem has many causes, but not all of them are faults. Often you must find out before you urgently need to change the TV or rush to the service center.

IMPORTANT! If you try to find the cause yourself, do not forget about safety. Always disconnect the TV from the mains before carrying out diagnostics.

Can the TV turn on by itself or turn off? The main causes that are not related to the breakage of the equipment:

  • Improper setting of the device function. Automatic shutdown due to lack of reception signal, as well as actions on the part of the user. In other words, the TV thinks there is no need for it to work (which is very convenient if the owner likes to fall asleep while watching movies). But a wrong setting can lead to a visible malfunction.
  • Setting a program that sets the time to automatically turn on and off.

Spontaneous turning on of the TV. the problem is easy to solve, you just need to enter the function menu and disable unnecessary options.

TIP! Before you worry, you should also check the presence of voltage in the network. Maybe it’s unstable, that’s why the appliance reacts this way.

TV turns off and on by itself? The next thing to check is the tightness of the plug’s contact in the socket. A loose plug will constantly come off the contact, especially if there are pets or people move around the apartment. Animals can pull the wire, and the vibrations created by movement can share a loose contact.

Dust has accumulated in it

TV turns off by itself? The next problem is accumulated dust. People often clean laptops, blow out computers and even wash the fridge, ensuring proper care. However, the television equipment is forever out of sight. Meanwhile, dust can also accumulate inside the TV. rarely, but it is a possibility.

REFERENCE! Usually televisions are protected by a tight enclosure with louvered openings for timely airing. They are also blocked from dust (overlapped, air penetrates. dust less often), but the possibility is still present.

Dust is not an electrical conductor, but sometimes its amount is enough to cause a short circuit on the board. It is enough to use vacuum cleaner to clean. it is necessary to take off the back cover and go over all the surface, details.

There is a problem with the power circuit

IMPORTANT! Make sure to check the socket, wire and plug for damage.

There are voltage fluctuations

One more reason for TV spontaneous operation. The reason for this is the prolonged use, as a result of which there are mini-cracks on the board. Humidity, an unstable voltage, high temperatures. all these lead to the breakage of joints and swelling of capacitors.

The TV turns on and off by itself: what to do? Take the TV set to a service center or, as in the previous case, try to repair it yourself. It is obligatory to follow safety rules when checking the board for damage.

These are the causes of spontaneous operation of the TV without apparent reason. Some of them can be eliminated by yourself, armed with a soldering iron, others can only be performed by a specialist. In any case such malfunction is not the reason to buy a new TV receiver.

Problems in the electrical circuits

If you still have doubts, you can also diagnose a breakdown of this type on your own:

  • Turn the TV set off and then remove the back cover.
  • Examine the condition of the board yourself, for this you will need a magnifying glass, a loupe.
  • If the part is cracked, it must be replaced, spare parts can be purchased at appropriate stores.

Repairing electrical circuits is an extremely serious problem, so it is better to entrust its elimination to a specialist.