Not a single household appliance, be it three times expensive, having the appearance of a reliable rock, is not immune from breakage. Especially as high-tech as a modern TV. Indeed, today it is not a simple device for watching programs; it can be a TV tuner, a computer or a multimedia center with access to the Internet. If the problem is visible visually - a fallen off wiring, a blown fuse or element, then it is simply eliminated. But usually breakdowns, and more often several at once, lurk in the bowels of the device, so the repair efficiency, the operability of the device are all in the hands of the master.
Why is this happening?
So, the TV turns on spontaneously, it works for several seconds, minutes and turns off. As practice shows, the reasons that led to such an "independent life" of the device are many. But before starting the search for the master and calculating the cost of repairs, it is worthwhile to understand that not in all cases the TV itself needs to be blamed.
Often you yourself are to blame for the problem - poor contact in the power cord, frayed wire, unreliable, dangling outlet. Or maybe you just didn’t clean the device for a long time - and just the dust prevents you from having a decent evening in front of the blue screen? Perhaps the cause of this behavior is power surges. Then we measure the voltage in the network with a tester, compare it with the original one, go to swear in the housing office.
Now about each reason in more detail, we will give recommendations for elimination, so that this does not happen in the future.
Human factor
70% of the normal performance of the device is on human attention, attitude to it. Hands do not reach to fix the socket on the wall, fix the frayed wire, twist the loose plug - so why do you complain that modern technology is unreliable? Bad contact leads to heating of the wiring, the plug heats up. Even short-term exposure to heat can cause a short circuit.
ATTENTION. In this case, turning off the TV is a minimal problem. In the event of a short circuit, burnout may occur, resulting in a fire.
And the solution is simple - monitor the integrity of the power cord, the reliability of the connection of outlets and plugs. If there are children in the house, then this must be done before each inclusion.
Software issues
Another problem that occurs due to the fault of the user can be eliminated by pressing a few buttons on the remote control. A master is not needed here.
The owners of modern TVs of the Samsung and LG brands were the first to notice a malfunction of this nature. The latest TV models, in addition to their main function of showing programs, connect to the Internet themselves, download software updates, and do many more useful actions for themselves, but questionable for the user. If the user has not disabled this function, then after walking on the World Wide Web, the TV will automatically turn off after a specified time.
In addition, it is possible:
- Incorrectly configured device.
- Some TV models turn off automatically if there is no reception signal or if there is no influence from the remote control.
- A program has been set that will automatically turn off the TV after a specified time (for example, a minute).
Method of struggle - go to the submenu, find the functions that are configured in the device. Take away the opportunity to independently update the software, automatically turn off. Also check where the device has visited, what it downloaded. Select and remove suspicious programs.
Blame the dust
Another problem that arises due to the fault of the user, which occurs quite often is the accumulated dust inside the device. Dust itself is not a good conductor, but with a large accumulation it can cause paths to short circuit between themselves and the body. This is fraught with the burnout of some elements, the power board.The solution lies on the surface - gently clean the inside of the device with a vacuum cleaner every six months.You also need to take care of the remote control. Preventively clean contacts and tracks. Wipe the circuit board with alcohol, allow to dry before assembly. If, after such a cleaning, the TV continues to behave as he wants, then perhaps the matter is in the inverter.
The inverter is to blame
Perhaps the reason for the chaotic on / off of the device is the microcracks of the tracks along the power circuit. This is due to the following:
- Power surges;
- High humidity
- During operation of the device, its periodic heating occurs.
- Aging materials, mounting elements.
This problem is serious, although it often occurs. Itself cannot be eliminated. It is necessary to turn to professionals. But you can identify it yourself. Unplug the TV from the power source. Use a table lamp or a lantern to provide a sufficient level of illumination. Remove the cover, then carefully use the magnifier to look at the tracks of the printed circuit board, the elements themselves, their connection points, and the quality of soldering.
IMPORTANT. Even small cracks, breaks cause instability of the device.
If it was possible to find microcracks, then in the workshop or service center you can specify a specific place. It will be pleasant to you and will speed up the troubleshooting.
Power surges
Another common defect that causes the device to turn on / off randomly. From the uneven voltage supplied to the apartment, all household appliances suffer, and especially sensitive, such as a TV. Jumps are possible due to the heavy load of the network, instability, malfunction of transformers at the substation, changes in weather, increased ambient humidity, etc. Modern devices have a circuit that can smooth out small irregularities in the network voltage, with more serious ones additional stabilizers are required.
Such a factor can cause severe heating of the equipment, as a result of which the indicator burns out, the winding is damaged.
Power Supply Burnout
BP is the most loaded part of the entire TV. A high probability of its burnout is a power surge.
Symptoms indicating problems in BP:
- The device does not show signs of life, there is no reaction to pressing buttons.
- Spontaneous inclusion, then turning off the device.
- The power indicator lights up, goes off instantly, and flashes.
In most such cases, a fuse flies. This can be seen with the naked eye: he swells, his leg breaks. Replacing is simple - take a burnt out element, carry it to the store, buy a new one. Then solder with a soldering iron on the back of the board. Do not touch other unsoldered elements - you can violate the integrity of the tracks or burn out the elements that are nearby. This can lead to new problems, and therefore to additional costs. If only a power supply burned out during a power surge, then this is easily repaired - it is completely replaced. Worse if the differential goes further, other elements are damaged. It costs more and is more difficult to repair. Repair makes no sense financially if the picture tube or LCD matrix is damaged. This is commensurate with the purchase of a new one.
TIP. A power surge has occurred in the house. It is immediately necessary to fix its exact time. Then call an authorized wizard who will determine the cost of damage. A paper is written at MosEnergoSbyt, where you must be compensated for all losses.
And now the main thing
The first reasons that are not related to the device itself are eliminated simply. But if you never held a soldering iron in your hands, all knowledge of electrical engineering is limited to the school course, then DO NOT TOUCH ANYTHING, immediately contact the service center. They will determine the cause, eliminate it. It will be much more difficult and more expensive after the intervention of an amateur.
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