LG switches on and then switches off at once

Phone turns on and then shuts down what to do. The phone shuts down regardless of the battery charge? Causes and solutions

No matter how you try to save your smartphone from falls and breakage, there is no insurance against the fact that it will one day turn off by itself, and then refuse to obey your commands, no. What to do if phone turns off by itself?

  • Power button failure. Sometimes the reason of similar problems is a defective power button which should be replaced. It can simply wear out, in this situation, to carry the phone in the service is not always beneficial, as a specialist will advise you to perform other repair procedures, it will be easier to buy a new budget unit.
  • The battery is dead. If a mobile device shuts down on its own, we recommend checking the discharge rate of its battery. If this process happens too fast, we recommend replacing the battery and then check if the situation is normalized.
  • Oxidized contacts. You might have spilled your phone with tea, got into the rain with it, came from the street in the winter season. all this leads to the formation of condensation in the device. If you accidentally wet the smartphone, take the battery out of it, and then thoroughly dry everything. If the phone then refuses to turn on, you need to go with him to the service center, where repairmen will try to bring your gadget back to life.
  • Mechanical damage and wear and tear. The most common cause is falling phone. Usually self-disconnection after such an incident indicates a serious problem with the device, so we recommend you to avoid self-disassembly, it is worth to go with him to the experts. If the phone was cheap, we advise you to buy a new one immediately, as repair work will not cost a small amount.

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LG TV does not turn on: step by step check and error correction

LG televisions, familiar to many due to its advanced matrix, are in demand. And if suddenly the consumer is faced with a situation where the LG TV does not turn on, it immediately sets itself up for an expensive repair. But repair is not always required, most often the problem arises from inattention and it can be solved yourself.

To find the cause should be carried out step by step. First of all all external elements are inspected. After the inspection is carried out diagnostics of the internal nodes. It is better to entrust such diagnostics to the LG service center specialists.

No matter what type of LG TV you have: liquid crystal, plasma, LED or kinescope. The malfunction will manifest itself in one of the following ways:

  • Indicator does not work and the screen does not turn on.
  • The screen doesn’t light up but the LED blinks as usual.
  • After turning on there are extraneous sounds for LG TV: clicks, humming, whistling.

If the TV turned off and does not turn on, and not only the screen does not turn on, but also the indicator light does not flash, then you should look for the cause in the following:

  • Check that there is power in the apartment.
  • Next, check the outlet. The outlet must be free of burn marks, must not smell of burning, and must not produce smoke. Plug another appliance into this socket and check that it is working.
  • Check the power cord and how well the plug is plugged into the outlet. The cord should be straight, with no kinks or bends. There must be no stripped wires sticking out of it. If the cord is frayed, it will need to be replaced.
  • If the TV is plugged into an outlet using an AC adapter, check to see if the button on it is on.
  • Check if the stabilizer works, if the voltage peaks are frequent in the apartment and the TV is connected through it.
  • If electrical problems are discarded, try pressing the power button. It is usually located on the side of the TV set. After that the light should turn red, green or blue. And the TV should start responding to the remote control.
  • Maybe the TV is in standby mode. This is a power-saving mode and turns on automatically after a few minutes of inactivity. Also sleep mode can be activated if the AV/HDMI/TV jack is inactive. At the same time, the TV works, but it does not manifest itself externally in any way. Use your remote control and press the “StandBy” button. Please note that you should not leave the TV in standby mode, as this function does not turn off the power supply and keeps the screen “on standby”, and this makes LG TVs vulnerable to power surges.

Let’s take a closer look at all the cases when the screen does not light up, but the indicator light is on:

  • The first thing to do is to check the remote control. If the buttons on the TV itself change channels, turn on and off the TV, you should replace the batteries in the remote control or check that they are properly installed. If this does not help, you will need to replace the remote.
  • Check if the brightness settings on the screen are correct. If the minimum value is set, the screen will remain black. In this case it will be necessary to return the setting to normal.
  • Incorrect update installation could be another reason. Then the TV constantly tries to reboot and does not respond to external commands. You can correct the situation by downloading the firmware to a USB-flash drive from the LG official site and then install it manually.
  • The cause may be an unstable voltage. In this case, the indicator light is red, intermittently blinking. You should turn off the TV and wait for the voltage to stabilize, but not less than 30 minutes, then turn the TV back on. Connecting a stabilizer to the TV will also solve the problem of voltage surges.

If when you turn on the TV you hear some unusual noises (specific clicking or humming inside the device), and the TV does not boot from the first time or it takes a very long time to boot, there can be several reasons for this situation:

  • The power system has blocked due to power surges. This happens quite often during a thunderstorm. In this case you will hear the characteristic clicks, they are produced by the blocker, which does not allow you to turn on the TV to avoid additional problems with the microcircuits. You will need the help of a service center specialist since you will need to disassemble the TV, disconnect the lock, as well as to find and eliminate the root cause.
  • Failure of the power supply, which is located inside the TV. When the power supply fails, the TV takes a long time to boot up and you hear clicking and whistling, the light bulb blinks because the electrical contact is intermittent. Most often the cause of failure is a blown capacitor. Also, one of the microcircuits of the power supply could have burned out or the fuse could have blown.

But there may be other problems that will affect the work of the TV:

  • If the TV set does not turn on with the button, you might have accidentally set the “childproofing”. In this case you should use your TV remote control. Since this protection only affects the buttons on the TV set.
  • Check which signal source is selected. HDMI or AV may be selected. If this happens, you will need to select the TV source.
  • If the TV is on and the light is on, but there is no picture on the screen, the reason may lie in bad weather conditions or in the failure of the service provider.
  • Matrix or LED backlight can be spoiled. In this case you can hear the sound, but the picture will be absent. There will be stripes or “lights” on the screen and LG logo will not appear at start up. This failure is one of the most expensive, but very rare.

We advise you not to disassemble the TV yourself. Disassembling the equipment will result in denial of warranty service. If you need to disassemble the TV, need diagnosis or cannot find the reason why the TV does not turn on by yourself, you should contact the LG service center.

Investor power

Quite often the reason why the TV turns on itself, hidden in the state of the microcircuits: because of age on them microcracks are formed, the board overheats, the equipment turns off by itself. You can identify such problems yourself: unplug the product, remove the back cover, take a powerful magnifying glass and examine all the microcircuits without hurrying. If you find cracks. call a master, only a professionally trained specialist can correctly eliminate these problems.

TV set can turn on and off because of an unstable voltage in the city electrical network. Voltage fluctuations primarily have a negative impact on the proper operation of capacitors and diodes, which are responsible for switching the equipment on and off. If after switching on the TV set worked fine at first, but then it turned off by itself after only one minute. it means that the problem is really in the capacitors. You need to take ammeter and check the voltage on the chip boards, if there is no proper response, you need to call a service center and call a master.

Do not try to fix such problems yourself. Capacitors and diodes can be replaced with a low-power soldering iron. You can burn out the circuit board and the repair cost will instantly increase to a hefty sum.

Voltage jump

Very often such a problem as a power surge can cause the TV to suddenly turn off or even shorten the life of the equipment. When you turn on your TV, the TV set introduces some imbalance in the mains voltage. Because of this, power outages are considered one of the most dangerous threats to electronics. Most electronics manufacturers try to protect their devices from possible surges in the network by providing protection directly in the design of the TV.

In the event of uncertainty in the smooth flow of electricity there is an opportunity to protect your TV from premature failure. To do this, there are devices that stabilize the voltage and, accordingly, control the voltage that goes into the TV.

Troubleshooting

To find out why the TV turns on and immediately turns off, you can try to fix the problem yourself.

  • Check the connection status of the antenna, router or continuity of the power cable;
  • Remove the back panel and try to inspect the TV and troubleshoot;
  • Pay attention to the capacitors, whether there are any blown capacitors among them;
  • If you have experience and minimal knowledge you can solve this problem by sealing the cracks yourself, then the TV will not turn on by itself;
  • Clean the contacts from rust and dust deposits;
  • Buy in a specialized store new items: capacitors, power supply (in case of damage, signs of melting or corrosion). Replace the old ones and maybe your TV will start working normally.

If there are no certain skills and knowledge, it is better to apply to a service center to carry out professional diagnostics of the device with the elimination of all detected causes!

If the recommendations mentioned here don’t seem to be working and the TV turns on and turns off by itself, it means that only a professional technician can determine the cause of the problem and fix it.

Contact a repair company that uses modern equipment, tools, staffed by experienced, qualified professionals. They will determine the cause, repair your TV. It is better not to turn to private craftsmen, because the results of their work may not be exactly as expected.

LG TV turns itself off and on

If your LG TV turns off and on by itself. It’s important to pinpoint the cause of the problem. it’s pretty obvious what’s causing the problem.

LG brand TVs don’t differ much from other brands. Structurally all modern TVs have a similar scheme and layout. And they have almost identical problems, they just occur more often or less frequently, depending on the brand and, accordingly, the quality of the assembly, internal elements, passive and active safety systems of the device.

In general, if LG TV turns off and on spontaneously, the problem can be both outside and inside.

Possible problems outside that you should rule out first. Is your TV’s power cord, socket. If your TV has an external power supply. also carefully inspect it and its wiring. Assess the state of the power button on your TV remote, whether it stays in the pressed position, thus sending a signal to turn off the TV. Check the TV settings on the Menu. Sleep mode, timer.

If you have checked everything, fixed it, but the problem remains. so it’s inside. For a complete diagnosis you need to open the TV. The tool kit is not very sophisticated. screwdrivers and sprockets, almost no exotics. After opening. blowing, cleaning and inspecting. An experienced eye will see the elements that have failed, if they are on the surface. resistors, capacitors, transistors, etc.ะด.

If there are no obvious burns or blows. we’ll have to go deeper. For this you need at least a multimeter, and ideally. multimeter and oscilloscope.

The first will show the resistances of radio elements, voltage and current, and allow you to assess the condition of individual sections of the circuit, while the second will. allows to visualize parameters of current, its frequency.

Next. testing of internal elements with the above described tools, knowledge, skills, all kinds of technical wizardry, making a diagnosis, search for spare parts (if needed) by part numbers, repair and success. You can watch Interstellar for the 5th time on a working TV without any problems.

When you need fast, accurate TV diagnosis and reliable, inexpensive repairs. Contact us, we’ll fix it ๐Ÿ™‚

Power supply problems

The power supply is the vulnerability of Samsung and Phillips. Despite the great quality of TVs, these companies still haven’t learned how to make good power supplies. When the power supply malfunctions, the TV can be diagnosed with these “symptoms”:

  • The TV set doesn’t respond when the on/off button is pushed.
  • No blinking LED at the bottom of the screen.
  • TV turns off after an indefinite amount of time.

Almost 80% of all power supply problems are caused by a blown fuse. The problem can be detected with the naked eye. the fuse has small blisters or a broken contact.

You can replace it yourself. Take the blown fuse with you and go to the service center to buy a new one. Solder the fuse to the back of the power supply board with a soldering iron.

Tip: do not try to solder other broken elements on the board, this case should be handled by a master, works only with a special soldering iron. Self-repair circuit board often ends up with additional problems with the TV.

From the following video you will learn how to identify faulty parts and what you can replace them with in the case of absence, using Samsung LCD TV repair as an example:

Common causes and their solutions

Let’s discuss common causes of problems when Samsung or other receiver turns on and turns off by itself, and solutions that work in specific situations.

Broken buttons

One of the most common reasons for a TV turning on and off by itself is a faulty power button. And switching off can be followed immediately after turning on the device. Sticking or jamming the button or other irregularities in clicking it signals that the part needs to be replaced.

A sunken power button on the remote control can also be the source of the problem. Usually stuck or irregular button response is the result of dirty contact surfaces, but sometimes the defect is caused by mechanical damage. In the first case it is enough to disassemble the control device 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 an infrared detector malfunction.

Repair requires special skills, so if you do not have them you will need the help of a specialist, as an option. you can buy a new remote control, which in some cases is cheaper than the restoration of the old remote.

Power surge

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

Power surges and sags in the mains 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 useful for all devices in the house. Another, less expensive solution would be to buy a voltage regulator or uninterruptible power supply, 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 televisions do not consume up to 100 watts.

Sleep Timer

A common reason why your Samsung TV set shuts down by itself is an activated sleep timer, not necessarily intentional and not always by you. You can turn the function off in the Smart TV settings, for which you will need to use the remote control and go to the “Turn off timer” section. If necessary, you can set a different shutdown time here or deactivate the option.

Software

In the case of “smart” devices software errors can be the most common reason for the TV to turn on and immediately turn off. It could be a consequence of an update, incorrect firmware or incorrect factory settings. You can change the settings, roll back to a previous firmware version if the problem occurs after an update, or perform a manual system update. To download the latest firmware version one has to go from the manufacturer’s official web-site, then load the distributive onto a USB-flash drive or some other device, connect it to the TV-receiver and launch the installation process. After completing the installation of the system and drivers the TV will restart, and if the problem was caused by incorrect firmware, it will be resolved.

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

Dust and moisture

Do not underestimate such a serious adversary as dust. Although in itself it is not considered to be conductive, but, forming clumps of dirt, and even worse, in tandem with moisture can lead to a short circuit of the contacts on the board and overheat, burn out of semiconductor components. For this reason, the TV receiver often turns off a few seconds after switching on, no matter what model you have, an old kinescope or a modern one.

In the case of settling dust, 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 it is necessary to remove the back cover of the device.

Moisture has a fatal effect on internal components, resulting in consequences such as short circuits, oxidation of the contacts and burning out of the modules. To fix the problem you need to arm the soldering iron to clean the pins of oxide and solder them again. The board tracks can be repaired by soldering or by using a jumper made of thin wire. Do not perform this procedure without proper skill.

Problems with the power circuit

Another common reason why the device shuts down after a few seconds or doesn’t turn on at all is a faulty power cord or socket contacts. This is easy enough to check by wiggling the power cord and 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 to determine which of the elements needs to be replaced or repaired. An external inspection of the cord is necessary, although it is not always possible to visually detect damage. If there are breaks or other defects, it should be replaced.

To conclude

In this article we have presented all the topical causes, why the TV set can turn on and off by itself. Certain problems can be solved independently, and in some situations you can’t do without professional help. Everyone must decide for himself how best to proceed. However at the initial stage it is better to make an inspection yourself, it is possible that the problem lies in the settings. For more serious problems it’s better not to take the risk and take the TV to a service center.

Hello! My name is Peter Gras and I am the editor in chief of this portal. On this site our team is trying to publish the most relevant and important information about different technologies in the world of digital television. Glad you stopped by, welcome!