The mobile phone turns off by itself. Why is my lenovo phone turning off by itself. Phone won't turn on after repair

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What to do if the phone turns off by itself? For starters, stop panicking as this is just an Android smartphone. If it stops working correctly, then you need to delve into either the software or hardware component.

Please note that old devices 5-7 years old begin to fail due to the impressive service life for the device. Remember that the gadget, in principle, is not designed to operate for more than 2-3 years, it becomes morally and physically obsolete, wears out and ceases to adequately respond to what is happening. Software is harder to find, the OS is no longer updated, and the characteristics do not allow most programs to run correctly.

Neither the top nor the budget gadget is immune from obsolescence of components. A modern device from the same Chinese manufacturer will give a significant head start to the flagships of 2011-2012, for which you paid a tidy sum.

Reasons why Android turns itself off

Why does my phone turn off by itself? It is dead and you put it on charge. In theory, after 15-20 minutes the device should start, but either this does not happen, or it goes into a cyclic reboot. It is not uncommon for a smartphone to turn itself off several times a day, while in standby mode, or during work / calls / games. There are enough reasons, so let's analyze the key ones:

• non-working power button;
• the battery has served its purpose;
• contacts are oxidized;
• a software failure has occurred;
• application conflict;
• mechanical damage;
• prolonged use;
• freezing.

Power key not working

The reason lies in the closure of contacts. If the device is under warranty, but the start key is extremely unstable, and you either need to press hard on it or press it repeatedly, exchange your smartphone for a new one, or take it to a free service prophylaxis. The reason is a factory marriage. In older phones, the problem occurs due to "advanced" age. Each button has its own work-to-fail resource. Yours has obviously reached its limit. Contacts moved away, oxidation began, dust got in.

Recovery will not be cheap, because often you will be offered to change not only the membrane, but also the controller, diluting the procedure with mounting soldering. Often, the amount of restoration is not much different from the price tag for a new state employee.

Read about solving problems on Android phones at androproblem.ru - best materials And helpful tips.

Battery

What to do if the phone turns off by itself, but the charge is full? The battery is probably out of date. To get started, try the following: leave it to charge for a day. If nothing happens, then there are several development options:

• burned down Charger;
• problem with the memory connection slot;
• the battery has served its purpose;

The first and third options are checked very simply: change the used component to a new one. True, on some smartphones the battery may be non-removable. In this case, a trip to the SC is provided. The same thing awaits you if the charging socket is either gouged, or clogged with dust, or oxidized. Only diagnostics will show the final verdict.

Contact oxidation

If you used the gadget with extreme caution and care, you are still not immune from oxidation of the contact base of the motherboard and other elements. Moisture can enter through environment, a sharp change in temperature as a condensate, and even from often carrying the phone in your hands in summer time. The palms sweat, sweat seeps into the seams between the lid and the speaker/microphone opening. The concentration is minimal, but the oxidation process is a long process.

First of all, clean the contact pad on the battery. If it is perfect in appearance, it does not interfere with walking on it with a sharp object, but very carefully. This is followed by drying with a hair dryer at minimum power so that the air flow does not spoil the internal parts. Putting the gadget on the battery is strongly not recommended - the device is simply not designed to work at such a temperature.

In the most critical cases, it is worth going to the master.

Software

The phone turns off by itself. Android is an open platform, so you can download any applications on it from both Google Play and external resources. Some get carried away excessively and do not understand that programs have begun to simply conflict with the file system, causing a constant reboot. Here, only the complete demolition of data, memory re-partitioning and flashing the gadget saves. Resetting to factory settings rarely helps.

If you do not know how to reflash the device - and do not think about doing it. In inept hands, it easily turns into a "brick" without the possibility of recovery.

In the future, you should not download several editors, players, galleries for viewing photos, and especially GPS navigators. No more than 1 representative from each direction. Exceptions are games.

Mechanical damage

The most common cause of sudden reboots is the fall, bumps and “flights” of your gadget. There is one way to check the device after such an impact - try to bend it a little. If the device turns off, then we can judge the internal problems fraught with a visit to the SC. The second point is a strong heating of the back cover, if this has not happened before. Perhaps the thermal pad between the chip and the cover has come off. Details can be found only after the analysis.

Just in case, check all wireless modules for serviceability and shake the gadget a little. If something rumbles - carry it in for repair.

Moral obsolescence

The smartphone works properly for 3 to 5 years without cosmetic and overhaul if you have used it carefully. Techniques on Android began to be published since 2008, which means that the oldest one is now about 9 years old. Also look carefully at the OS version: it must be at least 4.4.4, since earlier versions are not supported by either software developers or firmware manufacturers. This is a morally obsolete product that is just as expensive as memory. Getting it for such a spare part is a serious problem even in major cities. Repairs will cost more than the cost of modern gadgets.

Working in the cold

Often, smartphones work very poorly in the cold, the capacitive type display suffers especially. It reacts to heat, so it often does not perceive touch with fingers - hands have to be systematically warmed in pockets or gloves. Read the user manual carefully. Many devices automatically turn off at -20 degrees and this is completely normal. It is better to carry them in the inner pocket of your clothes, not in your purse and in the pocket of your pants and jeans.

3.7 (74.29%) 7 votes.

A mobile phone has long ceased to be a luxury, while the rapid development of information technology has made it a means of prime necessity.

The capabilities of modern smartphones not only provide a constant connection of a person with the outside world, but also allow solving many everyday tasks. But what to do in the case when the phone that served faithfully began to turn off by itself? There are usually several causes and solutions to this problem.

Battery failure

Autonomous operation of any mobile device depends on the energy reserve of its battery. Battery failure is a common reason why it becomes simply impossible to use a smartphone normally. To verify the presence or absence of this problem, you need to check the correct connection of the battery contacts by removing the back cover of the phone (if possible).

Otherwise, it is recommended to put the smartphone on a long charge - at least for a couple of hours. If after that the device still continues to turn off by itself, you need to replace the battery. Putting a removable battery on your own is not difficult, but in the case of a solid smartphone case, it is better to entrust this matter to professionals from the service center.

Software failures

The operating system of a mobile device is a complex mechanism in which dozens of applications operate. Usually, latest versions Android is reliably protected from all sorts of failures in the work of programs, but no one is still immune from random errors. Installing some applications can lead to various conflicts with the file system of the smartphone, due to which it spontaneously turns off.

Also, the reason for this may be blocking the operation of the device. To fix this problem, you need to use . If they do not help, you will have to reset the device to factory settings through the settings menu.

Mechanical damage

Smartphone hardware has a limited lifespan, which is why some modules stop working properly over time. The failure of individual spare parts can occur not only due to long wear, but also due to a blow or fall of the gadget.

To make sure that the internal microcircuits are working, you need to check the integrity of the phone case by trying to bend it a little with your hands. Automatic shutdown of the smartphone after such actions indicates a breakdown.

Moisture inside the device can also cause various failures, leading to periodic inoperability. In this case, it is necessary to disassemble the device within a few days. If there is serious damage to internal components, you will have to visit a repair service.

Power button issues

Majority modern devices switched on and off by pressing a special key. If this button is damaged or stuck, you may lose control of the power function.

Also, the reason for the inoperability of the key can be an ordinary factory marriage. It is important that it is unlikely that it will be possible to completely get rid of this problem without the help of a specialist.

Out of memory

Today, there are many heavy games and applications for Android, the normal operation of which requires high performance from a smartphone. Often, the simultaneous operation of several voracious programs is not the most in the best way affects device memory.

temperature fluctuations

The temperature conditions in which the smartphone is located during operation have a strong effect on its functions. Both overheating and severe frost provoke a loss of performance, as well as turning off the gadget.

The optimal temperature range for comfortable operation of a mobile device is from 0 to 35 degrees Celsius. That is why you should not use the phone for a long time in the cold season on the street. It is also not recommended to leave the device under direct sunbeams or close to a heat source.

There are many reasons leading to the sudden shutdown of the smartphone. Given all the above tips, it is quite possible to avoid this problem. As you can see, some phone problems can be solved independently.

Now let's look at the reasons why Android turns off by itself and try to fix the problem. Some reasons can be eliminated on your own, and with some you will have to contact the service center, because. you will need special equipment to fix the breakdown.

This article is suitable for all brands that produce phones on Android 10/9/8/7: Samsung, HTC, Lenovo, LG, Sony, ZTE, Huawei, Meizu, Fly, Alcatel, Xiaomi, Nokia and others. We are not responsible for your actions.

Attention! You can ask your question to a specialist at the end of the article.

Again, it is worth mentioning that the phone / tablet can turn off during a call, game, just in your pocket and other situations. Every situation has its own reason.

Android shuts down due to firmware or installed programs

The most common case and quite easily solved.

As you know, Android is modified by each smartphone manufacturer under specific model. As a result of mass character, there are flaws in the firmware.

Also, not always applications from Google Play good quality, or one of their updates.

This problem is solved like this:

Android turns off while playing

There are not only games here, but also other resource-intensive applications that load the phone: long viewing of YouTube or a video in the player, various programs with a graphics load, and more.

Did you notice that the phone gets quite hot? As a result, protection can be triggered that turns off the phone and prevents it from breaking due to thermal causes.

Try to search the web for information about your phone model and find out if it is characterized by such strong heating under load, or is this an isolated case. There is a possibility that you will have to contact the service.

In addition, prolonged heating may cause incorrect power supply from the battery to the device modules, resulting in a malfunction that causes overheating. But we'll talk about the battery a little later.

Android turns off during a call

In this situation, the reasons are most often the following:

• Damaged modem module (cellular sensor). This can happen both as a result of natural wear and tear (you have been using the phone for many years), and as a result of physical damage (shock, fall, moisture, etc.). In this case, only the replacement of the module in the service center will help. It will be difficult to diagnose such a breakdown on your own, because. all other options must be ruled out.
• The problem is with the battery. During a call, the battery incorrectly starts to "distribute" energy to the phone's modules, resulting in a failure and the phone turns off. The best way check - put a similar battery.
• Software errors of the phone firmware itself or installed applications(if the call takes place on Viber, Skype, Telegram and other instant messengers with a voice call function). What to do was considered at the beginning of the article.

The battery as the reason for the arbitrary shutdown of Android

Most often, it is the battery that is the reason why your phone turns off by itself.

Let's not dwell on cases where you have a non-original battery installed or it has worn out for more than 2 years. Consider a situation where the phone is fairly new (less than 2 years old) and the battery is factory installed.

Above, I already touched on the situation when the battery incorrectly distributes energy to the smartphone modules and a failure occurs that causes a shutdown.

If access to the battery is simple (just removed the back cover), then visually assess the condition of the battery: are there any swelling, signs of corrosion, or the presence of dents, cracks.

But, in practice, I had to deal with such a situation.

A phone from the "sale of cheap models in a communication store" segment. Those. some not very expensive models, designed for the mass consumer and going on sale.

As it turned out, the battery did not fit snugly against the contact group on the smartphone, as a result of which, when typing or shaking, the contact moved away and the phone turned off without an influx of energy.

OK. This is not your case and a phone from a well-known company, but a flagship model.

There is an option that is not charging with the original cable. As a result, the charging and power controller fails, which disrupts the power circuit. Recently, manufacturers have been specifically doing such things so that the user uses only original accessories (the pioneer of Apple) / You can only diagnose this at a service center.

Or does your phone turn off in the cold? Batteries don't like to stay in a cold negative environment for a long time, so keep it in your pocket, closer to your body. Also in this case, it will be discharged a little faster.

Other reasons

Other things to deal with:

1. When connected to Bluetooth, WiFi, LTE/3G cellular. System failure. We solve the issue with the firmware (the beginning of the article).
2. When connecting wired headphones to the jack. There is a failure due to contact closure. The reason can be both in the headphones themselves and the phone. First, let's try other headphones.
3. Turns off when charging is connected. First we check on another cable. If the reason is not in it, we go to the service, because. problem in the power circuit (connector, controller, battery).
4. Other reasons that may be caused by the failure of absolutely any phone module as a result of impact, moisture, and so on. I'm going to the service.

What is your reason?

A mobile phone is considered a huge multi-functional system, equipped with a powerful processor, large built-in memory and great functionality.

But sometimes the equipment fails and the phone starts to “fail”, for example, turn on and immediately turn off. Not in all cases it is worth contacting a specialist, often you can fix the problem yourself.

Hardware problems often affect turning on the phone. There may be several reasons:

1. Overheat processor or other parts of the gadget. In this case, you need to pull out the battery and let the phone lie down in disassembled form.
2. Faults control elements- various controllers can fail. For example, when a charge controller fails, it can always inform the smartphone that there is no charge on the battery, so the phone will immediately turn off. Only contacting the service center will help here.
3. Oxidation terminals and contacts. Usually this happens if the phone is “drowned” in water, or it has been in a damp room for a long time. You can remove the battery, check and gently clean its contacts, it will also not be superfluous to check the terminals on the phone.

The solution is simple - remove the battery and clean the terminals, or leave the smartphone to charge for a day.

Software bugs

The spontaneous turning on and off of the phone or tablet is also affected by software failures and violations.

The problem may be:

• installation incompatible software- Resetting the settings and rebooting will help;
applications;
• malfunctions BY- flashing the gadget can help.

Charging or battery problems

Most mobiles that failed were exposed to water. Process oxidation happens for a very long time and it is impossible to predict how the device will behave next time. There are several: hair dryer, leave overnight on the battery or move to a warm place.

Other Solutions

When the phone constantly restarts, turns off or turns on by itself - this speaks first of all of what is happening failure software ensure. Also, the reasons may be hidden in mechanical damage after a fall or shock. In these cases, you can go to the master to determine the breakdown.

But often the reason why a smartphone or tablet turns on and immediately turns off can be a trifle and it is possible to fix the problem yourself by flashing the device or resetting it to factory settings.

Phone turns off by itself

Initially, you need to determine the reason for turning off the phone:

• software failure;
• mechanical damage;
• incorrect battery operation.

If, as a result of a fall, the smartphone ceased to function normally and began to turn off, the reason is damage details instrument. If there are no mechanical injuries, then the battery is good and the problem is with the software.

Mechanical damage cannot be repaired with your own hands, so you should contact the repair.

Battery is defective or loose

The main reason for the breakdown of most smartphones is moisture ingress. To save the gadget, cleaning and drying is required, otherwise the phone may become inoperable. If the battery is defective, it must be replaced.

Battery can just walks away and you can put a thin sheet of paper or cardboard between the back cover and the battery. If the battery is in working condition, then you can only clear terminals from pollution and the problem will be solved by itself.

Low battery

This can happen at any time, even when the charge is full, or maybe at 40 percent, 15 or even 5. If the phone turns off at 5/15/25 percent of the charge, you need to do a full reset and clean the device. Then the battery should be recalibrated. If the situation has not changed within 2 days, you should contact the master.

Viruses

When the phone or tablet turns off on its own with a charged battery, it's time to check the device with an antivirus. It is viruses that cause most smartphone malfunctions. You should use an antivirus program to prevent infection of the device.

Software issues

There may be several problems with the software:

1. Not enoughmemory. In this case, you need to free up space.
phone. Do not clog the device with unnecessary programs.
2. Virus. The pest must be found and eliminated.

System failure

The phone may turn off even if fully charged. The reason may be a failure in the device OS, most often due to wrongfirmware. You need to repeat the firmware procedure or contact the service. If the problem still persists, it's time to upgrade. The device may be malfunctioning by itself.

If the device starts to freeze, then the problem is probably in the flash card. It can be simply changed.

When the phone heats up and turns off, there is probably factorymarriage. It's good to have a valid warranty.

One of the worst and most expensive reasons is damagefees when there are no other options other than replacement.

In conclusion, I would like to note that with careful use, the probability of uninterrupted possession of the gadget is very high. Technology, like people, also needs to be treated with care.

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

Why did my phone turn off but I can't turn it on?

There can be many reasons:

• Power button failure. Sometimes the cause of such problems is a defective power button, which must be replaced. It may simply wear out, in such a situation it is not always profitable to carry the phone to the service, as the specialist will advise you to carry out other repair procedures, it will be easier to buy a new budget device.

• The battery has failed. If your mobile device turns off by itself, we recommend that you check its battery drain rate. If this process is too fast, we recommend replacing the battery and then checking if the situation has returned to normal.

• Contacts are oxidized. You could pour tea on the phone, get into the rain with it, come from the street in the winter season - all this leads to condensation in the device. If you accidentally get your smartphone wet, remove the battery from it and then dry everything thoroughly. If the phone then refuses to turn on, you need to go with it to the service center, where the repairmen will try to bring the gadget back to life.

• Mechanical damage and wear. The most common reason is the fall of the phone. Usually, a self-shutdown after such an incident indicates serious problems with the device, so we recommend that you avoid disassembling it yourself, you should take it to specialists. If the phone was cheap, we advise you to immediately purchase a new one, as repair work won't cost a small amount.

Shutdown due to software errors

crashes software lead to trouble. If mysterious inscriptions appeared on the display, and then the phone turned off, then it is better to start flashing it. The task is simple, the instructions on the Internet are detailed, so you can handle it yourself.

It happens that the phone starts to turn off after installing the next application. To defeat such a problem, you should get rid of fresh programs. To begin with, try to reboot, if this does not help, uninstall the software, and for those who find this not enough, you will have to return to the factory settings. In a situation where nothing helps, you should try updating the firmware.

Take care of your mobile phone, it usually stops turning on due to erroneous actions, accuracy will help to avoid them. A few more options for resuscitation of the device are presented in the video.