Does your iPhone turn itself off? Don't rush to the service center

Sometimes iPhone users encounter a very annoying problem - the phone randomly starts turning off, despite the remaining battery charge. Sometimes this failure is due to the battery indicator not updating as expected, sometimes it is caused by a software glitch or a technical condition of the battery. There are several options why the iPhone turns off by itself. To fix this glitch, you can try simply draining your iPhone battery to 0 and then charging it back to 100%. If the problem was related to the iPhone battery indicator (it does not display the remaining charge correctly), then this method will be able to fix it, and the device will not turn off.

Possible causes of malfunction

If the iPhone turns on and turns off immediately, then the reason for this may be:

1. Battery wear. Its current voltage is simply not enough to initialize the device (it must be at least 2.5V), which is why the device turns off when trying to start the OS. You can check the performance of the battery yourself only using a digital multimeter (which is also capable of creating a load of 0.5A or more), but to do this you need to remove the display module.
2. Software glitch. Most often it occurs due to a lack of free memory on the device (when there is no way to save temporary OS files), as well as due to a “deep” battery discharge.
3. Failure of one of the hardware components on the motherboard. When you turn on an iPhone of any version, the first thing you do is initialize the internal components: modem, processor, camera modules, microphone, display. If at least one of them malfunctions, then the smartphone attempts to initialize again (reboots). If the error persists, then the phone turns off completely or displays an error message. In this case, all the components may even be in good working order, but the reason is a broken track on the printed circuit board.

You can try to fix just the software glitch yourself or still try to charge the battery. But disassembly in the absence of such experience should not be done. In addition, for this you will need a set of special screwdrivers (Torx T5, ​​T6, Pentalobe 0.8 and so on).

By the way, if the iPhone 6 turns on and turns off immediately, this may also indicate that it has outdated software installed. A similar situation arose in 2015, when this model was updated to the iPhone 9. Due to a software bug, the operating system often went into a cyclic reboot, which could only be fixed by flashing the firmware in DFU mode.

But if the iPhone 5S turns on and turns off immediately (as well as the iPhone 5 and 5c), then this may also indicate a failure of the Y2 controller (the so-called “quartz”). For these models, this is a typical breakdown that occurs even due to a slight blow to the lower corner of the case.

The "apple" icon is constantly lit on the phone screen

A common situation is when the iPhone turns on, the charging indicator appears on the screen, after which it goes out and the “Apple” logo appears, or a notification that it will soon be discharged. If the iPhone freezes and turns off immediately after turning it on, most likely the reason is a system failure when restoring from a backup. Rebooting the gadget and restoring from iTunes will help solve this problem.

To do this, do the following:

• make sure the battery is charged and will not run out soon
• Prepare your computer and USB cable
• sync iPhone with PC
• Turn off your iPhone by holding the Home button and the Power button
• hold down the power button and wait for the iTunes application logo to appear on the screen
• release the power button and start recovery mode on your computer

Once the restore is complete, the iPhone turns off immediately. Put the iPhone on charge and wait until it is full. Then press and hold the power button for a while and, if necessary, reboot the device. If this does not help solve the problem, and the iPhone still turns off immediately after turning it on, professional diagnostics of the iPhone is required.

iPhone turns off due to unstable charging source

If the phone does not charge when turned on or starts to turn on but immediately turns off, the reason for this may be an unstable iPhone charging source. If charging an iPhone is done in a garage, car, or country house, this affects the performance of the device, since the power supply in such places is unstable. To prevent your phone from breaking, follow these guidelines:

• If your iPhone regularly turns off and on, diagnose the device
• charge your smartphone only in places where the current supply is stable
• do not use chargers from other phones
• try not to use car chargers

If you follow the recommendations for using the iPhone, as well as regularly diagnosing the device, iPhone problems occur much less frequently.

The phone stopped turning on due to hardware problems

If the iPhone stops turning on when charging is connected after a shock or fall, a possible reason is that one of the phone components has broken down. In this case, the charging indicator lights up on the screen, the Power button (off button) responds to commands, but the phone does not work correctly. To find out if this is the case, you need to have the device professionally diagnosed.

The main components that affect the operation of the phone are as follows:

• motherboard – if the motherboard malfunctions, the phone turns on, then the screen starts to go dark and the device turns off
• charging controller - if you cannot connect the charger because the plug does not go in all the way, diagnose the charging controller. Perhaps the smartphone stopped turning on because of it
• Power button - if the contact of the power button has oxidized, sooner or later the phone turns off and does not turn on. In this case, mandatory diagnostics and repairs are required.
• battery cable - when the cable connecting the battery to the microcircuit comes off, the iPhone does not charge correctly, so it periodically turns off and turns on spontaneously

If the iPhone has stopped charging or periodically turns off and turns on due to hardware faults, it is not recommended to repair it yourself. Diagnosis and replacement of faulty gadget parts should be carried out using professional equipment.

Professional smartphone repair

If your gadget has stopped charging, the charging icon is on the display, but the battery capacity does not change, or it freezes and cannot turn on, urgently call an experienced technician registered with Yuda to diagnose your phone. Private specialists repair iPhones on more favorable terms than service centers, and also provide the following benefits:

• repair of Apple smartphones of all models and modifications
• use of original spare parts when replacing
• guarantee for all work performed
• minimum repair cost

Professionals will be able to fix the iPhone in a short time, depending on the type and complexity of the breakdown. If your iPhone turns on and off while charging, urgently fill out an application on the website and select a performer.

What to do

The first step is to put the phone on charge and leave it for 30 – 60 minutes (even if it doesn’t show any signs). Afterwards, try to turn it on in the usual way. If there is no reaction and the backlight does not even light up, then this is an obvious problem with the power supply. That is, the hardware room - then you should contact the service center. You can replace the battery yourself, but it is not a fact that the problem is with it. It is quite possible that the power controller has failed and the phone simply does not recognize the battery (the controller on the battery transmits information about the current charge, the controller on the motherboard reads it and then starts the initialization process).

If the iPhone turns on and off immediately while charging, that is, during boot (the Apple logo is displayed on the display), this is most likely a software failure. To fix it, you need to completely reset the device in the following way:

• update iTunes on your PC to the latest current version (only MacOS and Windows are suitable; iTunes does not exist for Linux distributions);
• using a USB cable, connect the smartphone to the computer (preferably to the USB 2.0 port located on the back of the system unit);
• if the phone is recognized in iTunes (an image of a USB connection will appear on the iPhone display), then you need to select “Restore iPhone” in the application and follow the prompts on the screen to perform a reset; the firmware itself will be downloaded automatically;
• if nothing happens after connecting the iPhone to the PC, press the Home and Power keys on the smartphone simultaneously and hold them for 10 seconds, then release Power, but leave the Home key pressed while waiting for the drivers to install, then select “Restore iPhone” in iTunes "and wait for it to be flashed.

Attention! The Home + Power combination is to put the phone into the so-called “Recovery mode” (DFU). It is used to update the software or to reinstall it in cases where the smartphone does not work properly due to a software glitch.

For iPhone X and other phones that do not have a physical Home button, entering DFU mode is done by holding down the Power and Volume- keys. In the same way: hold down for 10 seconds, then release Power and continue to hold the Volume key until the computer recognizes the device (a dialog box appears to detect an iPhone in recovery mode).

Perform a hard reset

Usually a hard reset will solve this problem. A hard reset is similar to the procedure: “have you tried turning the device off and on again,” but at a deeper level of the operating system. Typically a reset occurs to factory defaults.

To hard reset your iPhone with a physical home button (any iPhone model before iPhone 7), press and hold both Sleep/Wake

” and “
Home
” for 5 seconds. The iPhone will reboot, you will see the Apple logo icon flashing and the iPhone will come to life.

On iPhone 7 and iPhone 7 Plus models, press and hold the “ Sleep/Wake”

” and “
Volume Down
” to perform a hard reset procedure.

If all else fails

If the above tips do not help restore the functionality of the iPhone, then further repairs are possible only at a service center. The most common failures in which a cyclic reboot occurs are as follows:

• malfunction of the battery power controller or on the motherboard;
• processor chip malfunction;
• short circuit of the power supply circuit of the display module (this happens when moisture gets inside the case);
• The modem (wireless network controller) is faulty.

In each of these cases, the faulty part is simply soldered off and replaced with a known good one.

To avoid similar problems in the future, you should adhere to the following rules:

• use only the original charger;
• Do not install non-original batteries in your phone;
• If you suspect moisture has gotten inside the case, immediately turn off the phone and contact the service center;
• Perform a complete reset of the phone at least once every 6 months (backup data will be saved in iCloud or you can make a copy via iTunes).

So, why does the iPhone turn on and turn off immediately? More often - due to a software failure or battery failure. If the smartphone has not been dropped or “bathed” before, and there are no signs of mechanical damage on the case, then you can try to reflash it yourself via iTunes (in normal and DFU mode). If this does not help or you cannot reset the software at all, then you cannot do without detailed diagnostics at a service center.

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Let's consider the causes of the problem when the iPhone turns off on its own, although no visible damage is visible and you did not drop it or fill it with liquids.

The root cause could be several factors:

1. Firstly, there may be problems with the battery. If you use the device contrary to the recommendations in the instructions or if the phone is bumped or dropped, the battery contacts or the battery itself may be damaged. In this case, random shutdowns can occur at any time during operation of the iPhone when it is shaken sharply. A symptom of this problem may be the phone suddenly turning off, as when the battery is removed. But when turned on again, the battery charge is different from zero. The solution to the problem is to contact a service center for inspection and repair.
2. Secondly, this may be a consequence of the activity of some installed application. In this case, when you run this program, the iPhone constantly turns off. This is based on the mismatch of certain application components with the iOS operating system and a conflict occurs when the application is launched. In order to avoid damage to system files and user personal information stored on the device, the operating system stops working or reboots the device.

• Thirdly, one of the convenient functions of the timer of this operating system is to automatically stop working and go into hibernation (sleep) mode. In this case, certain specified applications stop working and the iPhone turns off itself and goes into energy saving mode. Determining this condition is quite simple - the smartphone does not actually turn off, but disables most functions. In this case, the device “wakes up” after activating the screen or pressing keys. This feature is very convenient if you prefer to listen to music or watch videos on the device and set a sleep timer. After the specified time has elapsed, the application will automatically turn off. If the timer is set incorrectly, the phone may turn off randomly. A symptom of this case will be a shutdown at a strictly set time. To disable the function, go to the “Timer” menu - “Settings” and disable the timer.
• The fourth option is possible for devices that have been operating for several years. When using the phone for a long time, the cellular sensor wears out and it receives a signal worse. The consequence of this is a constant search for a good signal, increased load on the sensor and rapid battery drain. With severe wear and tear, the battery almost immediately discharges and the phone turns off. The solution is to contact a service center to replace the sensor or replace the device.

If updating the firmware and iOS did not help you, as well as resetting your iPhone to factory settings, we strongly recommend that you contact your nearest service center to fix the problem. Repairing your iPhone yourself can only make the situation worse and you will end up paying even more money to restore your phone.

Improper use of the smartphone battery

If your iPhone turns on and immediately turns off, or starts to reboot spontaneously and the power button does not respond to commands, a faulty battery may be the likely cause. If you have been using an iPhone for more than a year, then the loss of battery capacity is quite natural and replacing this part will help solve the problem. When an almost new iPhone turns off, the battery failure is most likely caused by the following factors:

• using a non-original charger - despite the similarity of original and Chinese-made chargers, they differ in the way they supply current, as a result of which the battery fails, so the iPhone starts to turn on and immediately turns off
• regular voltage drops in the network - using the original iPhone charger does not always guarantee the health of the battery. With constant voltage fluctuations in the network, the battery fails prematurely, so the iPhone turns on and begins to turn off, or a notification appears on the screen that the device will soon be discharged
• moisture ingress - if even a small amount of moisture gets in, the battery fails, so the iPhone immediately turns off, or does not charge when turned on

Why does my iPhone turn off and on?

The reasons why iPhone 5, iPhone 4s, iPhone 6s may turn off and turn on spontaneously may be due to the following points:

The first method is to update the operating system

The first method to start searching for the cause and restoring normal operation of the iPhone is to update the software version. Sometimes it will be enough to perform a regular update so that the phone stops turning off by itself. Updating the system is especially important in cases, for example, if you previously used a test version of iOS on an iPhone or iPad.

To do this, go to the Settings application, then on the General – Update tab, check if there is a new version of iOS available for our smartphone. If yes, install it and wait for the iPhone to reboot.

Troubleshooting steps

In cases where the iPhone 4s or iPhone 5s constantly reboots, you should reset the operating system, carrying out a high-quality cleaning of the iPhone using the phone (reset is in the main menu):

1 If the iPhone 4 turns itself off, as well as if the iPhone 5 overloads itself, you need to perform a hard reboot, resetting the time indicators. To perform this operation, you need to press the “home” function and hold it until a message appears about the battery loading process. 2 Connect the adapter to the iPhone. The device will turn off while the battery is charging. If after some time the iPhone 4s, iPhone 6 or 5s turns on and off on its own, you should replace the battery. This is especially effective if the iPhone 4s is rebooting. 3 The occurrence of software errors can lead to the device rebooting or hanging when rebooting. To prevent this factor, you should carry out the recovery process through iTunes (firmware update). 4 Use a more powerful adapter from the iPad (which is also recommended by the manufacturer if these problems occur). 5 Entering the device into DFU - a mode where the device is left booting for some time. Since in this state the system is not loaded (the screen is not lit), which means the energy is used to charge the battery. A very effective method, especially if the iPhone is hanging on an apple, is to connect the wire to the device for 3 seconds, and you should not wait for it to turn off, but immediately pull it out. The algorithm of the actions performed is as follows: connect for 3 seconds, then pull out for 3 seconds. Thus, the process of connecting (3 seconds) and disconnecting (3 seconds) is carried out within 3 minutes. After 3 minutes, the reboot problem will be resolved. At the same time, the iPhone will reboot every few minutes. This method can solve the problem associated with the device randomly turning on and off.

If all of the above steps do not help, you should contact a specialized service center for the repair of this equipment, where qualified specialists will help in solving problems associated with the iPhone turning on and off spontaneously, as well as rebooting every few minutes.

Recovery via iTunes

One last resort may be to restore your device to new condition with factory settings through the iTunes app.

Step
1
: Connect your iPhone to your Mac/PC and launch iTunes.

Step
2
: After recognizing your iPhone in the app, select the device bookmark and select “
Back up Now ”
to create a local backup of your device.

Step
3
: After completing the backup, click on “
Restore iPhone
”. After this, the process of downloading the latest version of iOS software will begin, completely deleting your data and installing a new operating system on your device.

At the end of this procedure, your phone will be restored to the condition when it first came into your hands. After this, you will be prompted to restore your phone data from the backup you saved before. After the data recovery process, all your applications and their data will be back on your iPhone.

Reasons why iPhone turns off spontaneously

1. Battery malfunction.
2. bugs in iOS.
3. battery indicator error.

Battery fault

In the event of a battery failure, the iPhone can turn off and on either with or without the charger connected. You won’t be able to solve the problem yourself, since the issue is replacing the battery. In this case, you will need the help of service center specialists. The cost of the service is about $100. But before you rush to get your iPhone repaired, it’s worth considering two other possible options for the problem that has arisen.

iOS Bugs

If the reason lies in the system update, then it is possible to identify and resolve it yourself. True, this process is very labor-intensive. You will need a clean installation of the system. Why the iPhone turns off due to updates is a complex question, but it is known that when updating to the latest versions, a kind of baggage of unnecessary garbage accumulates in the system. And it is also the main reason for the rapid discharge of the battery.

So, the “treatment” of the problem consists of the following:

• connecting iPhone to iTunes;
• a complete local backup of all existing files and other stuff located on the gadget;
• clicking the “Restore” button;
• restoring a backup.

After these manipulations, your iPhone will not need to be repaired, and you will be able to once again enjoy the trouble-free operation of your favorite gadget.

Battery indicator error

Sometimes the battery indicator may also give incorrect data. Fixing this problem is as easy as shelling pears. You will need to completely discharge your gadget (to zero), wait a few more hours to be sure, and then charge (without turning on) the iPhone to 100%. Do not interrupt the charging process! As a rule, after such actions, the indicator again shows the correct charging percentage and expensive iPhone repairs become unnecessary.

Please note that if none of the proposed methods brings a positive result, contact the official Total Apple service center to repair your iPhone.

Update to iOS 10.2.1 or later

In earlier versions of iOS, if a power-hungry app such as a photo editor suddenly increased its power demand and your battery was already weak due to excessive charging cycles or exposure to heat, your iPhone could mistakenly shut down before the battery dropped to scratch to protect yourself. Apple updated battery management in iOS 10.2.1, fixing the problem in 80% of cases.

So, if you are still on the old firmware, update your device to iOS 10.2.1 or later. The latest version is always better as it fixes bugs and security vulnerabilities.

Why does my iPhone turn on and off on its own?

Owners of some models of smartphones and iPhones are constantly faced with such a problem as spontaneous turning on and off. This can be caused by many reasons. First of all, the battery pack may not have adequate access to power. As a result of this, any electronic device: smartphones and mobile phones, and the iPhone is no exception, begins to turn off and on on its own, and the power level indicator displays either a full charge or constantly changes its indicator. The reasons that cause problems with the iPhone's system power supply can be different.

For example, a problem may occur as a result of connecting an iPad charger to the iPhone. Despite the fact that the connectors of these gadgets are almost the same, the current supply systems are different.

Often, battery malfunction is caused by constant charging of the iPhone in a car, at the dacha, in the garage, etc. In all of these cases, there is an unstable current supply from the battery or a stationary power source, which is characterized by an uneven supply of electricity. In this case, too high an electrical voltage leads to a negative impact on the battery.

In addition to improper charging of the device, the cause of spontaneous turning off and turning on of the device may be a malfunction of the printed circuit board or other component. This can happen if the iPhone has been hit against a hard surface or exposed to moisture.

However, such a defect can also arise as a result of a software failure. Therefore, if you encounter such a problem with your iPhone, first of all, analyze all your recent actions. A software failure is very likely if you installed any unlicensed applications yourself or tried to activate anything.

To resolve this problem, you must reinstall or reconfigure the software. It is advisable not to do this yourself, as this can cause more significant defects in the operation of the iPhone or even completely destroy it. In any case, if signs of device malfunction appear, it is better to contact a specialized service.

Only a professional technician with special equipment will be able to carry out correct diagnostics and accurately determine the cause of the gadget’s malfunction.

Moreover, if the reason why the iPhone turns off and on is not software, but hardware, the only way to fix this is to replace the faulty component. In such situations, it is better to contact a service center. The most common cases are when you need to carefully replace the iPhone 5C battery. This is a rather complicated process that is best left to a specialist.

Contact Apple

If you have completed all the above procedures, then we have eliminated all possible reasons for your iPhone to suddenly turn off even with a sufficient charge level at the software level.

That's all we can do ourselves. Your device may have a damaged battery or other internal electronic component. If your iPhone is about 3 or more than 4 years old, then this is probably the case (I’ve even seen iPhone 6s with similar defects).

In such a case, the best thing to do is to call customer support or visit your nearest Apple support or Apple store. If your device is still under warranty or has an extended warranty from Apple Care+ (always a good idea), then Apple may exchange your device for a new one or you will pay to have your device repaired.

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A very common problem that users of Apple gadgets encounter is when the iPhone turns on and off while charging. There are many reasons why an iPhone starts to turn off, and you can fix many of them yourself.

To solve the problem of turning on, spontaneous rebooting or failure of the shutdown button at home, it is necessary to consider in detail all possible causes of the malfunction and methods for repairing them.