Android tablet won't start, what should I do? The tablet does not turn on: possible problems and methods for solving them. Troubleshooting hardware problems

Many users are faced with the problem that their tablet does not start. This phenomenon can manifest itself in different ways.

For example, sometimes the device turns on, but does not start, that is, all the signs of turning on are there (lights are on, some processes are happening), but nothing is displayed on the screen.

In other cases, loading occurs as usual, but the shortcuts are not visible - the loading screen freezes. Maybe the user sees the manufacturer's logo, but nothing further happens. But be that as it may, there are several ways of what to do in this situation.

1. Follow some simple steps

In most cases, no special action needs to be taken.

Instead, do this:

• Place the tablet on charge. It happens that the tablet becomes completely discharged and cannot show a single image or even the manufacturer’s logo. So connect to your device charger and wait at least 10 minutes, then try to turn it on again.
• If everything is fine with charging, just wait a while. In some cases due to full memory The tablet will take an extremely long time to load. Therefore, the best solution in this situation is to simply wait and then clear the memory a little.

There are times when trying to do something yourself does not make sense and it is better to trust the professionals.

In particular, this is what we are talking about:

• Mechanical damage. Try to remember if you have dropped your tablet recently. For some models, even a slight throw into the bag will be considered a serious blow. As a result, the screen breaks and it will no longer be able to work. It is best to send the device in for repair and ask for a screen replacement.

Attention! Without special knowledge of the internal structure of tablets, you should not try to do this yourself.

• The video adapter has completely failed. Again, in this situation, the only solution will be to replace this element. Checking this option is quite simple - nothing will be displayed on the tablet at all, including the system menu, which we will talk about later. In this case, send the tablet for repair. Perhaps the masters will find some other problems in it.

2. Hard reset

There are many reasons why a tablet may not work. But we are talking about those cases when Android does not start on the tablet. That is, there is some kind of reaction when the device is turned on, but then nothing happens.

Most often this manifests itself in a frozen manufacturer's logo or Android logo, as shown in Figure 1.

There can be many reasons for this phenomenon, but the most common of them are:

• incorrectly installed applications;
• malfunctioning applications;
• forced completion system applications;
• some applications close or affect others.

In this case, the only way out is to do full reset devices.

This is done as follows:

• Turn off the tablet and, just in case, take out the SIM card and card MicroSD memory.
• Press and hold the volume up button (on some models you need to press the down button) and the power button at the same time. On different models Entering the system menu can occur in different ways. If the above instructions do not help in your case (the same picture as shown in Figure No. 2 is not displayed), read the documents for your tablet. You can also go to the manufacturer’s official website and find all the necessary instructions there.
• A system menu will appear, in which, using the same volume up and down buttons, go to the “wipe data / factory reset” item.

• On some models, you need to go to “Settings”, then to “Format System” and finally click “Reset Android”. After this, the tablet will reboot and may begin to vibrate; in any case, the process of erasing all information and returning to its original state will begin.

It is worth saying that it is not always possible to do a full reset the first time, so if the tablet still does not boot after all the steps described above, do them again.

3. Non-standard situations

It happens that as a result of searching for the correct combination to enter the system menu, the user ends up in unexpected modes and sees non-standard pictures.

For example, you can see a picture of a lying robot with an open belly. In this case, press the power button again and wait until the tablet reboots.

You may also accidentally end up in Fastboot mode, as shown in Figure 4.

In this case, use the volume buttons to navigate to “Restart bootloader” and press the power button to select it. The tablet will reboot.

When loved Android tablet won't turn on- this is certainly very unpleasant. But don’t get upset prematurely, because in most cases the problem can be solved on your own. So today you will find out what to do if the tablet does not work.

What are the causes of failure?

Why won't my tablet turn on? There are two main reasons for its failure: hardware and software.

The term “hardware failure” means that your tablet does not turn on due to a physical impact on it, a mechanical failure of some of its parts.

A software failure means that your tablet has stopped functioning normally due to software problem. For example, due to viruses, unsuccessful system updates, or exposure to an application.

Now let's talk about each of them in more detail.

Hardware failures

If The tablet won't turn on, then first of all you need to hold down the power button for 10-15 seconds. If nothing happens, you will have to remove the battery, then insert it back and turn it on again.

It's also possible that your battery is completely drained, so it's worth charging your tablet. If after 10 minutes you cannot turn it on, then there is a possibility that either your charger is broken or the power button does not work.

A possible reason for the tablet not turning on is a broken screen matrix. In this case, you definitely need to take the tablet to a service center. It is also likely that some components have burned out.

If the tablet stops working after physical impact (fell, hit something), then you are unlikely to be able to fix it yourself. In this case, you will have to contact the service center.

Do not forget that your device has a warranty (provided that you did not buy the tablet abroad) for a certain time, so if you have something wrong with the tablet within the first 6 months after purchase (for many stores it is 1 year ), then you should fix the problem or replace it with a new device for free.

If you received a tablet from abroad, it may be covered by a manufacturer’s warranty, so you need to contact your brand’s service center to find out more about this.

Software faults. What to do with them?

If your Android tablet won't turn on, that is, there is a high probability that the problem is related to software problems.

Your device may have stopped working properly due to exposure to any installed application. If your tablet is still turned on, but freezes or does not work correctly, then you need. Read about this in a separate article on the website.

Another option is to flash the tablet firmware. I already told you...

I'll tell you briefly about the reset. Better read full version instructions in the link above.

To reset your Android tablet, you need to go to Recovery mode. Since all devices are different, the method of entering this mode is different. To do this, with the device completely turned off, you need to hold down one of these key combinations (almost certainly the first or second):

• Volume Up, Volume Down, and Power Button
• Power On/Lock, Home and Volume Up
• Volume Down and Power Button
• Volume Up and Power Button
• Volume Up and Volume Down

Once in Recovery mode, find the “wipe data/factory reset” item, select it and click on “yes - delete all user data”. Then you need to select “Reboot System”. Move using the volume keys, and confirm your choice with the power button or the context menu button.

More details about resetting settings on Android are described in the instructions at the link above.

The tablet is small in size mobile computer, which appeared on the market thanks to Apple in 2010. Distinctive feature tablet from desktop computer or laptop is the lack of a keyboard and mouse. To control the operation of the tablet, just touch the screen with your fingertip (tap in slang) at the desired point, and to turn pages, just slide your finger across the screen in the desired direction.

Thanks to their small size, weight and ease of control, tablets instantly conquered the whole world and today, in any corner of the planet, in the most unexpected place, you can meet a person with a tablet in his hands. The mobility of the tablet not only opened up new communication opportunities, but also provoked additional tablet malfunctions associated with their mechanical breakdowns. The tablet can be accidentally dropped, sometimes people sit on it or step on it.

All tablet malfunctions can be divided into two types - software and hardware. Software failures in the operation of the tablet occur in the event of a malfunction of the software and are eliminated by flashing firmware or reinstalling the non-working application. Hardware failures (mechanical and electrical) are associated with the failure of tablet elements, such as microcircuits, transistors, resistors, capacitors, batteries, buttons, touch screen or matrix.

In this article, using the example of repair Acer tablet A500, a method for repairing a tablet with mechanical damage to the power button located on its body is considered. Due to a broken button, the tablet could not be turned on or off.

If the tablet does not turn on, what should I do?

If suddenly the tablet, which has been working stably up to this point, does not turn on the next time it is turned on by pressing the Power button, many fall into despair. After all, I really wanted to chat with friends or wander around the Internet. The first thing you need to do is calm down and analyze the situation to determine the possible cause of the tablet failure.

Reasons why the tablet may not turn on

The tablet may not turn on for one of the following reasons:

• The battery is low.
• Power adapter failure.
• Incorrect operation of the software.
• Button failure turning on Power, battery and other components.

The list of faults is listed in order of frequency of their occurrence. Let's look at how you can determine the cause of a tablet malfunction and how to repair it.

Tablet battery is dead

If the tablet was working for a long time, and it was not turned off with the power off button, then it is quite possible that you will not be able to turn it on next time. Although the tablet is through set time It automatically goes into sleep mode, but still continues to consume a small amount of electricity. If the battery is completely discharged while the tablet is not in use, the tablet will automatically turn off and it will be impossible to turn it on using the power button.

To revive the tablet, you need to connect the power adapter to it and press the power button and hold it down for more than three seconds. The tablet should turn on and load the software.

The power button may not respond if the tablet for a long time was outside at negative air temperatures. This is due to the fact that at negative temperatures any battery loses its ability to fully deliver electricity.

It is unacceptable to immediately turn on the tablet after strong cooling. After bringing the tablet from a frosty street into a warm room, it is necessary to wait at least half an hour until the tablet warms up and the condensation that has fallen on its surface evaporates. If electronic components get wet, the tablet's electronics may malfunction.

The tablet may also not turn on without connecting the power adapter to it if the battery is faulty. The battery may fail prematurely due to its poor quality, being in a state of deep discharge for a long time, or as a result of exhaustion. High-quality batteries last from 3 to 5 years, and over time the tablet's operating time is offline mode due to battery aging, it gradually decreases.

Installed in tablets lithium ion batteries, which do not tolerate long-term deep discharge. This condition of the battery greatly reduces its service life and can even completely destroy the battery. Therefore, if a notification appears on the tablet screen about the need to connect the charger, this should be done as soon as possible. The battery also needs to be fully charged before leaving the house or before leaving the tablet for a long period of time.

On any screen electronic devices When running on battery power, a dynamic icon is always displayed indicating the battery charge level. The icon is a battery shaded partially or completely in white, as shown in the photo to the right. When the battery is all shaded, the battery is fully charged.

Malfunctions and repair of the tablet power adapter

The tablet power adapter is an electronic unit that converts 220 V AC voltage from a household network into voltage DC 12-18 V. The voltage depends on the tablet model.

The adapter is also designed for a certain load current and therefore it is unacceptable to thoughtlessly use a power adapter from other devices instead of the standard one, even if the connection connector is suitable, since you can damage the tablet.

The tablet's power adapter has a frayed wire.

Despite the high reliability of power adapters for tablets and laptops, even Chinese ones, it happens that they fail. In most cases, this occurs due to violation of operating rules. Some users, when working on a tablet with the adapter connected to the mains, due to the insufficient length of the wire, pull it like a string. It happens that the adapter wire is chewed by pets.

As a result, where the wire exits the connector, it frays, or the contacts in the tablet socket are deformed, and the supply of voltage to the tablet occurs intermittently and eventually stops altogether.

If, when working on the tablet with the power adapter connected, the lightning symbol on the battery icon periodically disappears, this indicates that the wire has partially frayed or the contacts in the adapter power connector socket have become deformed.

In order to determine where the contact is lost, you need to insert the adapter connector into the tablet and, pressing it against the tablet, make sure that lightning appears on the battery icon. Then crumple the wire. If the lightning disappears, then the wire is to blame. If the lightning does not disappear, then the reason is poor contact of the detachable connection. The plug needs to be inspected. If there are no external signs of its mechanical destruction, then deformation of the contacts in the mating part, which is installed in the tablet, has occurred. Replacing the connector in the tablet is possible only in a service workshop.

Tablet power adapter does not output voltage

If previously, when the tablet was running, the battery was steadily charging, and suddenly the battery stopped charging, although the battery was not yet fully charged, then the adapter was inserted into a de-energized or faulty outlet, or it was faulty.

Any power adapter always has a sticker that indicates all its technical specifications, including output voltage and permissible load current. For example, the adapter label below states that the adapter provides an output voltage (OUTPUT) of 19 V and allows a maximum load current of 2.15 A.

You can find out whether the power adapter is to blame for the fact that the tablet does not turn on using the power button by measuring the voltage at the output connector of the adapter with a voltmeter.

To do this, just use the ends of the probes of the multimeter, turned on in the DC voltage measurement mode, to touch the central and external terminals of the connector. The plus is usually located on the center pin of the connector. If the voltage value is equal to or greater than that indicated on the sticker, then the adapter is working and the cause of the malfunction lies in the tablet.

How to repair a tablet power adapter yourself

If diagnostics show that the tablet does not turn on due to a faulty power adapter, then there are two ways to solve the problem - buy a new adapter for $15 or repair the faulty one yourself.

In order to accurately determine whether the wire or electronic unit of the power adapter is faulty, it must be opened. Typically the adapter body consists of two halves glued together. To separate the halves, you need to insert the flat blade of a screwdriver into the gap near the outlet of the adapter cord and gradually move the halves apart around the perimeter. Sometimes this is not very easy to do, but, as a rule, it is always possible without damaging the outer surface of the case.

After opening the adapter, access to the place where the cord wires are soldered will open. To localize the failure, you need to use an ohmmeter to ring each of the wires of the cord in turn, touching one probe to the place where the wire is soldered, and the second to the corresponding terminal of the connector. In this case, it is necessary to bend and stretch the cord. If the resistance of the wires is close to zero and does not change when exposed to the cord, then it is working properly, and you need to check the operation of the electronic part of the adapter.

Attention, part of the adapter's electronic board is not galvanically isolated from household network and touching exposed parts of parts and printed conductors is dangerous.

If the cord is in good condition, then you need to check the operation of the electronic part. To do this, you need to connect the adapter to the power supply and measure the voltage at the soldering contacts of the cord wires with a voltmeter. It is best to use a “Pilot” type extension cord with a switch as an outlet. The “Pilot” switch must be set to the off position and the adapter must be inserted into one of its sockets. Next, set the multimeter to DC voltage measurement mode and touch the soldering points of the output cord wires. Enable "Pilot". The voltage must be equal to or greater than that indicated on the label.

If there is no voltage, then it is necessary to inspect appearance electronic parts, printed conductors and electrolytic capacitors (blue cylinder in the photo) for the presence of swelling or traces of electrolyte leaks. If there are any, then they need to be replaced.

Repairing the adapter electronic board requires knowledge and experience with measuring instruments. If an external inspection fails to identify the failed element, you can complete the repair and buy a new tablet power adapter.

If the cord is broken at the point where it exits the adapter, it can be shortened, the insulation removed from the ends and soldered, observing polarity, into a printed circuit board. If the break is located at the entrance to the connector, then a complete replacement of the cord will be required, since when replacing only the connector it is impossible to securely fasten the wires in it. When purchasing a new cord, you should choose one with a connector of the same size that was previously installed.

When soldering the cord into the board, you must observe polarity. On the adapter board shown in the photograph, the polarity is marked “ + " And " - " is not indicated. But it is already clear that the negative wire is always soldered into the hole marked GND (common wire) ( external contact connector), and in VO - positive (central contact of the connector). There is no standard for the color of adapter wires, and therefore, before soldering the wires into the board, you need to test them using a multimeter.

All that remains is to place the cord in the recess of the adapter body and close its halves. To glue the body, you need to lubricate the joint along the entire circumference with Super Moment universal second glue, press the halves tightly against each other and leave in this position for several minutes. But before gluing, it is advisable to connect the power adapter to the tablet and check its operation. If the tablet immediately turns on and the battery begins to charge, then you can glue the adapter case and at this point, repairing the tablet power adapter with your own hands can be considered complete.

Incorrect operation of the tablet software

There are times when the tablet does not turn on when you press the Power button after rash user actions with the software, such as incorrect installation of new applications, unsuccessful firmware, change or move system files. It is possible that the tablet may be infected with a virus. In this case, the tablet turns on with the Power button, but the software does not load or does not work correctly. As a result, a picture of a broken robot may appear on the screen or the screen may remain black.

If the screen is black, to restore the tablet's operation, you can try to reboot it using the RESET button recessed into the case. Some tablets do not have an inscription, but have a red dot next to a small hole. The RESET button is specially recessed to prevent interruption of running programs when accidentally pressed on it when working with the tablet. Therefore, pressing the RESET button on the tablet can only be done using a toothpick, the end of a straightened paper clip, or a similar thin rod.

Before pressing the button, you should disconnect the tablet from the docking station and remove the SIM and flash cards from it. Next, press the RESET button and hold it for at least 3 seconds. The system should reboot and it is quite possible that the tablet will work.

Before rebooting the tablet using the RESET button, please note that in some tablet models the system may return to factory settings. In this case, all settings and personal information you have made will be lost. If all of the above actions do not lead to a positive result, then you should contact the service, since restoring the tablet’s operation is only possible by connecting it to another computer that has special software installed and experience working with them.

Troubleshooting
and repair of the Power tablet power button

It happens that the tablet does not turn on if the Power button does not work. A button malfunction can be easily diagnosed by the behavior of the tablet when you press it.

Diagnosing a malfunction of the Power button

Pressing a working Power button should be accompanied by the following tablet behavior:

• A quiet mechanical click coming from the button.
• When the tablet is in sleep mode, cause a picture to appear on the screen.
• A pop-up menu will appear to turn off the tablet if it is running.

If the tablet behaves differently when you press the button, then the button is faulty and you will need to disassemble the tablet to repair it. It will be possible to work on the tablet, but it will be impossible to turn it off, and you can turn it on only by inserting the plug of the power adapter connected to the network or by pressing the RESET button. While the battery is charged, the tablet will be either in a working state or in a sleep state. It will be impossible to turn off the tablet, but it will turn off itself when the battery is completely discharged.

If after diagnostics it is determined that the tablet does not turn on due to the Power button not working, then to repair the tablet you will have to disassemble it.

How to disassemble an Acer A500 tablet with your own hands

Using the example of disassembling the Acer A500 tablet, let's look at how to properly disassemble the tablet. Before you begin disassembling the tablet, you need to prepare workplace and stock up on tools.

The table on which the tablet will be disassembled for repair must be covered with a soft cloth. The tool you will need is a screwdriver with a thin Phillips blade, tweezers different sizes, metal spatula, plastic pick or bank card.

Typically, the two halves of the tablet body are held together using latches. But some models also have screws. Sometimes they are clearly visible on the back cover, and sometimes they are hidden under rubber stops. Therefore, before disconnecting the covers, you need to carefully inspect the tablet and, if you find screws, unscrew them.

Along the entire perimeter inside the main half of the tablet, in which the screen and all the electronics are installed, there are plastic bosses with indentations, as shown in the photo above.

And along the perimeter back cover protrusions are made that, when the covers are closed, go into the recesses of the front part of the tablet body. When squeezing the body halves, the protrusions fit into the recesses and thus ensure reliable adhesion and tight closure of the tablet body halves. Therefore, in order to disassemble the tablet, you need to remove the protrusions from the recesses.

The fewest latches are located in the area of ​​the volume control and tablet power buttons. Therefore, from this place we must begin separating the halves of the housing.

Now that you can imagine how the latches of the tablet are arranged, you can begin to disassemble its case. The tablet should be placed on a soft cloth with the screen facing down. Next, insert the blade of a metal spatula into the gap between the halves of the tablet to a depth of a couple of millimeters, and lowering its handle down and slightly turning it opens the nearest latch. As soon as a gap has formed between the halves, you need to insert a flat-head screwdriver or other object into it so that the halves do not close together again. Now, moving the spatula around the perimeter along the gap, you need to unlock all the other latches.

On the Internet you can find recommendations to use a plastic card or a pick (a small plastic thin triangle that musicians use when playing stringed instruments) instead of a metal spatula, but I was unsuccessful in trying to disassemble the tablet using them. When trying to squeeze the plastic card into the gap between the tablet covers, it became deformed. But to separate the remote control housings remote control Using a plastic card is very convenient.

The back cover, freed from the latches, must be removed carefully so as not to break the wires coming from electronic parts possibly installed in it, such as speakers, microphones or a video camera.

The back cover of the tablet has been removed, and now you can examine it internal structure to decide on the sequence of further disassembly.

If the tablet was disassembled for replacement battery, then now you need to unscrew the screws securing the cover covering the battery. Next, unsolder the wires going from the battery to the board (if soldered) or remove the connector and replace the battery with a new one. When soldering wires, polarity must be observed.

The tablet was disassembled in order to restore the operation of the Power button, which, as a result of diagnostics, was found to be inoperative. After removing the back cover and inspecting the button, it became clear why it did not work - the solder in the places where the base of the button was soldered to the printed circuit board. As a result, the button moved to the side, and it became impossible to press the Power key. But it was too early to rejoice, since access to repairing the button could only be obtained after removing the motherboard with processor.

How to properly disconnect connectors and flat cables of a tablet

Difficulty in removing motherboard The problem was that many cables were connected to it using detachable connections, including several flat ones without connectors, which were very thin and easily damaged. To properly uncouple the connectors, you need to understand how their halves are held together.

Attention, it is unacceptable to disconnect the connectors by pulling them by the cable wires coming out of them, since the wires are thin and can easily break. It is especially dangerous if the wire looks intact on the outside, but inside the plastic sheath the wire is broken. Finding and fixing such a malfunction on your own will not be easy.

The simplest connectors in a tablet are coaxial, which are designed to transmit high-frequency signals. The removable half of the connector is fixed to the recess in the mating part thanks to the spring-loaded rim of the split cup. To undo the connector, you need to pry the cup by the rim with the flat blade of a screwdriver.

The connectors shown in the photo do not have latches and are held in place by friction. To undock them, it is enough to grab the removable part of the connector with the jaws of tweezers and, by rocking it to the sides, remove it from the stationary part. If two identical connectors on flexible wires are located nearby, then to avoid confusion during assembly, it is advisable to mark them before disassembling the connector.

This type of connector has two tab-shaped latches on the top surface of the removable part. The protrusions engage two square-shaped holes made in the soldered part of the connector. The connector is undocked in the same way as the previous one.

To pull out the plastic connector inserts, I use small tweezers 10 cm long. To prevent the tweezer jaws from slipping, they are tucked in, as in the photo. These tweezers are also convenient for pulling out the leads of resistors, diodes and similar radioelements from the printed circuit board when desoldering.

This type of detachable connection is a flat cable, the bare end of which is pressed against the contacts in a plastic block. A black strip is visible on the connector, which is the locking lever.

To release the cable, simply turn this bar 90° clockwise, as shown in the photo, and, grasping the edges of the cable with your fingers, remove it from the connector.

To secure the cable in the connector, using minimal force, grasping its sides with your fingers, insert the cable into place in the connector.

All connectors from the motherboard are disconnected and all that remains is to peel off the pieces of tape that hold the wires in place and unscrew a few screws. The adhesive tape must be saved, since when assembling the tablet it will need to be glued to its original places.

This is how the tablet's power button came off, obviously Chinese manufacturer saved on solder. The button was installed in its original place and soldered using a ten-watt soldering iron to the printed circuit board. Additionally, the button was tested using a multimeter. When you press its pusher, the resistance becomes zero, and when you release it, it becomes infinity.

Behind the power button there is a rather massive tablet position sensor. To avoid repeated displacement of the power button, the distance from the back wall of the button to the side of the sensor was measured with a caliper. It was three millimeters. A plate the size of a button was made from a fiberglass plate three millimeters thick.

The plate, after covering its sides with a thin layer of Moment glue, was tightly inserted between the button and the position sensor, as in the photo. Thanks to this modification of the motherboard, it became impossible to move the power button from its place even when pressing it hard.

It is very unpleasant when the tablet stops turning on. This can happen for a number of reasons. For example, due to problems with hardware or software. Sometimes the device stops working after being dropped. In any case, you need to carefully and slowly study the behavior of the device. This will allow you to determine whether it is worth fixing the problem yourself or whether it is better to take the tablet to a service center.

It often happens that the tablet turns off and does not turn on, although it worked normally before and no program installations or system settings were made. In this case, the problem must be looked for in the power subsystem.

Zero charge

Maybe, mobile assistant It's just dead and won't turn on. In this case, it is enough to connect it to an outlet with an adapter. The device will not react immediately to the supply of voltage. Depending on the model and the level of charge required for activation may take up to 10 minutes until the indicator appears on the display.

If the device does not show signs of life within half an hour, it is necessary to disconnect it from the network and carefully check the condition contact groups at the adapter connection point. Possible situations:

• There are oxides and a large amount of dirt on the contacts;
• foreign large debris has entered the connectors;
• the contact groups are closed by a conductive material, for example, a piece of foil from a pack of cigarettes or a chocolate bar.

All connectors and contacts are needed clean thoroughly. It is better to do this after the battery is disconnected from the system. In tablets of reputable brands such as Samsung, Lenovo, Huawei or Asus, this operation is quite simple. Most likely, the device has a removable battery, which can be accessed after removing the back cover. In lower class products, such as Prestigio, Irbis, Digma, the battery can be soldered or connected with a cable directly to system board.

After the contacts have been cleaned, it is worth checking the operation charging adapter on any other device with the same interface format. Having connected the tablet to the network, even if there are no external signs of charging, it is worth wait at least two hours. If the device gets hot, let it cool completely. Then try to start the tablet.

Battery over-discharge

If the tablet does not turn on after being completely discharged and lying on the shelf for a long time, the battery is most likely over-discharged. It depends on the model of the device whether it can be revive using standard methods. For example, if an Irbis tablet that does not have residual charge control turns off, you will have to take it to a service center.

To fix the battery over-discharge situation, you need to:

• For Lenovo tablets, Samsung, Asus and others with a removable battery - remove it and charge it on a special device with high current;
• for devices where the battery is connected directly to the system board, contact a service center or a sufficiently qualified private workshop.

In difficult cases, it may not be possible to initiate the charging process or “push” the battery, the battery will have to be changed. For branded tablets Huawei, Lenovo and others, you can immediately order the desired type of battery. In Chinese devices from unknown manufacturers, it is worth removing the cover and reading the markings on the battery in order to buy it in an online store and repair the tablet.

Battery failure

Lithium-ion or lithium-polymer batteries have an expiration date. If the battery is constantly discharged below 10% or operates in inappropriate conditions, it will no longer produce the current required for starting operations in the tablet's hardware. Usually this causes the battery to swell. You can check this fact by opening the device case.

If the battery has clearly visible signs of deformation, this is the reason why the tablet does not turn on. Because of this, other troubles may occur. For example, the tablet turns on and turns off immediately. There is only one way out of the situation: the battery needs to be changed.

Memory problems

The tablet has two types of memory: RAM and permanent memory. The latter stores all data operating system and user programs. If the device overheats, A situation may arise where individual storage chips are damaged. This manifests itself in different ways. For example, the tablet froze when turned on or refused to work after installing standard operating system updates.

Important! The clearest sign of permanent memory corruption appears to be repeated instances of boot failure. Usually it is not possible to start the tablet right away: it starts to freeze at the Android startup or reboot cyclically.

In this case, nothing can be done. If the tablet goes out suddenly, reboots cyclically, or stops working after a harmless system update, it is recommended to contact a service center. Similar problem with incorrect work Flash memory can occur after the device has been dropped or been exposed to strong vibration or shaking for a long time.

Physical damage to the hardware

Children constantly carry the tablet with them and often drop it. A broken tablet screen can make it seem like the device won't turn on. Visually, the device does not respond to the buttons at all. At the same time The screen backlight is dimly lit. If the device has been dropped, you should immediately contact service. In addition to a broken display, an impact may disrupt the operation of other parts of the hardware platform.

Note! If after a fall only the sensor does not work, then you can change it yourself.

Advice! People with some skills can conduct initial checks. After a fall, if the tablet goes out and turns off, it is worth checking the condition of the signal loops. To do this, you need to open the case and check the tightness of their installation in the corresponding connectors.

If the screen on the tablet goes dark and does not turn on, and at the same time the charging and condition of the battery and contacts are all fine - most likely, we are talking about video adapter failure. Most often this occurs due to overheating. To fix the problem, you will need qualified help. If the device's warranty has not expired, it should be taken to service. Otherwise, look for a private workshop based on reviews of the work of its specialists.

Software problems

Recently installed programs or crash system services may be the reason why the tablet charges but does not turn on. In such a difficult case, you will have to lose all settings and applications. With synchronization services configured, restoring key data will not be difficult.

Usually, if there are problems with the software, when you turn on the tablet, only the name is lit or it freezes on the splash screen when you turn it on. It shows what to do system reset. This will restore the Android settings to the state they were when the product left the factory. On different devices, the operation is performed in a certain way.

1. Before resetting, you need to remove all memory cards and SIM cards from mobile operators from the device.
2. Tablets from reputable brands (Samsung, Asus, Lenovo, Huawei) do not have a physical reset button. The system is formatted via the bootloader menu. To enter it, press the volume up and power buttons. After a pause, the tablet will enter Recovery Mode. In the menu that appears, select Format System, then Wipe data/Factory reset.
3. Inexpensive devices, such as Irbis, Digma, Prestigio, have physical reset button. To press it you will need a thin paperclip. After checking the instructions, you need to find the reset hole and press the button located behind it for 5-15 seconds.

Another way to turn on the tablet if it does not turn on after a software failure is enter the fast boot menu. Usually, the screen shows an Android robot on its back with an open hatch on its stomach. Using the volume buttons, you need to select the Restart bootloader menu item. Key combination or sequence of keystrokes for specific model The tablet is worth searching on the Internet; the manufacturer usually does not provide such data in the documentation.

Conclusion

Deciding what to do if the tablet does not turn on should be done only after some observation of the device’s reactions. For example, do not panic when the device refuses to work immediately after connecting to network adapter. If the tablet blinks and does not turn on when charging, this means that the battery capacity is not enough to activate the hardware platform. The device needs to be given more time.

The best tablets according to buyers

Samsung tablet Galaxy Tab A 10.5 SM-T595 32Gb on Yandex Market

Tablet Apple iPad(2018) 32Gb Wi-Fi + Cellular on Yandex Market

Huawei MediaPad M5 Lite 10 32Gb LTE tablet on Yandex Market

Apple tablet iPad Pro 10.5 512Gb Wi-Fi on Yandex Market

Microsoft tablet Surface Pro 5 i5 4Gb 128Gb on Yandex Market

Users often complain that their tablet refuses to boot. What to do in this case? What actions can easily “revive” the device? Is there any way to turn on a device that refuses to work? Why does my tablet sometimes refuse to boot? Understanding all these issues is actually not as difficult as it seems at first glance. There can be many reasons for this phenomenon. You just need to carefully remember what preceded the breakdown. What to do if the tablet refuses to boot?

The tablet refuses to boot: possible reasons

As previously mentioned, various situations can be possible sources of the problem. There is even a certain classification of reasons. It helps to understand 50% of what happened and draw up a further plan of action. Tablets and other devices may refuse to boot and operate normally in the following cases:

— as a result of hardware problems;

- if failures occur in the installed software.

In the first case, it is impossible to say for sure whether it will be possible to “revive” the tablet. In the case of software, it is most often possible to easily restore the tablet’s functionality.

The battery is dead

Now let's talk about what specific problems users most often encounter, and what methods can be used to solve them. What to do if the tablet refuses to boot? It doesn't matter here whether you are using an Android tablet or any other. First of all, you need to make sure that the device has enough power to start working. As a rule, if it is not there, the device will refuse to work. In some cases, the tablet boots up and then immediately turns off. In some cases, the screen goes blank after the manufacturer's logo. The occurrence of such situations may be due to the fact that the device has some energy, but it is not enough to normal operation with the operating system. In such a situation, you can do the following:

— turn on the tablet to the network, wait a little and try to turn on the device again. Once charged, the problem should go away;

— change the device battery. Bad or faulty battery may cause the tablet to refuse to boot.

Manufacturer

Another common cause of problems can be the device manufacturer. Tablet refuses to boot? Do not be surprised by this phenomenon if you use Chinese products. In particular, we are talking about duplicate products from well-known manufacturers. If you are using Chinese tablet, then problems associated with turning on the gadget can be solved using the following methods:

— rebooting the gadget (constant attempts to turn it on);

- repairs in service center;

- buying a new gadget.

Most often, in practice, Chinese gadgets can be revived in the service. The easiest way to solve the problem is to purchase a new tablet. U original devices Malfunctions and malfunctions occur extremely rarely. However, no one is 100% safe from them.

Exposure to viruses

What should I do if the tablet turns on but refuses to boot? This phenomenon is actually not that rare. Many users have encountered similar situations in practice. Sometimes problems associated with turning on the tablet are caused by viruses that penetrate the operating system of the device. Today there are many viruses that disable the operating system of phones and other mobile devices. Treatment can bring the gadget back to life. It is usually carried out in service centers. Users are not recommended to inspect or clean tablets themselves. Otherwise, you may experience a complete crash of the operating system.

Settings

What to do if the tablet refuses to boot? The main thing is not to panic. Most problems can be dealt with without much difficulty. You just need to know which methods to use in a particular case. For example, the reason why the tablet refuses to boot may be due to incorrect operating system settings. You can "reset" them. Usually after such an action the device begins to function normally.

Hard Reset

Reset function in mobile devices called HardReset. This action carried out according to a certain algorithm. Here you do not need the help of specialists. Each user is quite capable of independently coping with this task. If your tablet does not boot, then before going through all the possible causes of the problem, it is recommended to perform a HardReset. This function It is recommended to follow the following algorithm:

— remove the memory and SIM card from the device. These are not mandatory steps, but it is better to take them for normal operation of the operating system;

— press the device power button and volume controls simultaneously. Keep these buttons pressed for a few seconds;

— the device should vibrate and turn on;

- on the screen you need to select “Settings” - “Format”;

— select “Reboot” or Reset. The device will perform the action mentioned above, and all settings during this process will be reset.

The algorithm presented above helps you perform a factory reset. If this was the problem, then after the described procedure the tablet will start working normally.

Firmware problems

We have not yet described all the reasons why the device under study may refuse to work. As previously stated, the problem may lie in the software. What should I do if the tablet refuses to work normally and does not load beyond the logo? In this case, it is proposed to use one technique. It is better to use it after activating HardReset. What is it about? we're talking about? We're talking about operating system firmware. Problems with this component may cause the tablet to refuse to boot. In this case, experts recommend restoring the firmware to its original state. How can this be done? To perform firmware recovery yourself, it is recommended to use the following algorithm:

— press the power button and volume button on the device at the same time;

— wait for the tablet to vibrate;

— release the pressed buttons when the device vibrates;

— in the menu you need to select “Settings” and “Firmware recovery”;

— wait for the process to complete.

It is worth paying attention to the fact that if it is impossible to enter the tablet firmware recovery mode, hardware damage may become the source of startup problems. In this case, you will most likely have to buy a new device or take the gadget for repair.

Flashing

What to do if the tablet does not boot? Another way in which a tablet can be brought back to life is by flashing the gadget. Carrying out this process yourself is highly not recommended. Re-flashing in inept hands can lead to the final death of the device. Therefore, it would be best to take the device to a service center. There, for a certain amount of money, specialists will flash the device. The tablet will then work like new. Incorrectly performed flashing of a device can cause a lot of problems for users.

Damage

If the tablet does not turn on and does not react at all to user actions, then the problem may be due to mechanical damage. Modern users very often encounter this problem. You can fix this problem using several methods. The following techniques should be used:

— try to turn on the tablet several times;

— take the device to a service center for diagnostics;

— change the device.

Mechanical damage usually occurs due to negative physical impact. For example, if the device is crushed or dropped from your hands. This problem occurs quite often when the tablet is simply carried in a bag along with many other things. Such situations are most often resolved only by replacing the device. There is no point in flashing or resetting the device. In this case, it is better to entrust all manipulations to professionals.

Repair

What to do if the tablet refuses to boot, and all the methods described above did not bring a positive result? In this case, there is only one last option - contact the service center. For a fee, specialists will perform a complete diagnostic of the device and help bring the tablet back to life, if this is still possible. It is this method that most often causes the least problems for the user. The service center will be able to change damaged components tablet and firmware. Contacting such organizations only in some cases turns out to be useless. In this case, there is only one way out - to buy new gadget. In fact, you shouldn’t be afraid of a situation in which your phone or tablet won’t turn on. If you don’t want to take a long time to figure out the problem yourself, then it’s better to immediately take the device for repair. This is the safest and best solution.