After rebooting, the tablet does not turn on. Android won't load past the logo

Today, tablet computers are produced by many manufacturers, including modern market you can find hundreds various models these devices. True, in addition to a similar design, most tablets have one more common feature, namely, operating Android system. This OS is the most accessible for manufacturers, which is why it has gained such popularity. Apart from accessibility, Android OS has many other advantages.

Let's imagine a situation - you are the owner of a tablet running on Android OS, but at one not very wonderful moment your device stops turning on. What to do if the tablet does not turn on?

Causes of failure and their solution

There are several reasons why the tablet may not turn on:

The battery is completely discharged;
Software problems and problems with Android OS;
Mechanical damage to the device.

Let's look at each of them in more detail.

Low battery

What to do if the tablet is dead and won’t turn on? This is the simplest case and the problem of turning on is solved quite quickly - just put the device on charge and give it 10-20 minutes for the battery to gain the minimum charge to start. If the device does not charge, take a different charger as this may be the problem. After the tablet has charged a little, it will be able to turn on.

Software problems

Failures can be caused by various factors:

Virus and malware;
Low-quality programs that can harm the OS;
When you try to install your OS firmware.

If the tablet turns off and does not turn on, the easiest way to solve the problem is Hard Reset. This action will return the tablet to factory settings, and that's it installed programs And user files will be deleted. Before doing a Hard Reset, you need to remove the memory card and SIM card (if installed) from the device.

Hard Reset is made from special system menu, which can be called up by simultaneously pressing the volume up (or down) button and the device’s power button. Each tablet model may have its own combination.

You can also reinstall the OS or restore it using a computer if it has special software from the developer (not all manufacturers have it and these programs may be individual for each tablet model).

Mechanical damage

If the tablet shows no signs of life at all, there may have been mechanical damage. The tablet will not turn on normally if:

The battery is damaged;
The video adapter is damaged;
The device's motherboard itself is damaged;
There is mechanical damage to the screen.

The presence of some mechanical damage is quite easy to determine. For example, if the tablet screen does not turn on, but the charging indicators are lit, the melody that plays when turned on is played, or the tablet vibrates, the screen or video adapter is damaged.

If the tablet does not turn on after charging and a Hard Reset cannot be done, then the problem is in the battery or motherboard of the device. IN in this case the best solution is to contact service center(especially if the warranty period has not yet expired). If you are not technically savvy and do not know the device tablet computer, do not attempt to disassemble it yourself.

You are reading this article because you cannot start your tablet. There can be many reasons for malfunctions, they can be both hardware and software. But this article is not about that. Why the tablet won’t turn on and how to revive it, we’ll look at it in more detail in this article.

Method 1.Check charger

In order to check the charger, it is easier to use a multimeter. The tablet must output 5, 9 or 12 Volts. If you don’t have a multimeter, then ask someone for a charger with the same connector as on your tablet, but be careful that the charging voltage is the same. Enough The charger often fails. In most cases this happens with Chinese tablet models. If the charging cord has USB connector – you can try charge it via computer. It should be taken into account that the cable itself may be damaged. It is better to first ring the cable or replace it with a known good one.

You can do this a couple of times, also try to do it while connected m charger. If The tablet does not turn on in these cases, then you need to find a small hole on the tablet with the inscription RESET. Using a toothpick or other similar object, press the button.

Method 3. HARD RESET

If nothing happens after a reboot, then the Bootloader is damaged. Bootloader this is the bootloader that controls the kernel operating system to boot the tablet in normal mode. Then Hard Reset should help. Important before execution further actions remove the SIM card and memory card from the tablet. To do this, you need to hold down the power button and the volume rocker down or up (depending on the model of your devices). Will start menu in which you need to select Settings, then Format system.

Method 4.Broken power button

The tablet may not turn on due to a broken power button. As a rule, the button has a characteristic click and should return to its place after pressing. If this does not happen, you need to check it with a multimeter. Most likely there are 4 contacts, you can try p rip the button.

Method 5.Check b atarei

You need to disassemble the tablet, disconnect the cable or battery power connector and connect the power supply to it. Next you need use a multimeter and check the voltage at the battery output.

If you have a 3.7 Volt battery (charging 5 Volts), then the voltage should be between 3.9-4.2 Volts;

If you have a 7.4 Volt battery (9 Volt charging), then the voltage should be between 7.9-8.2 Volts;

If you have a reinforced 7.4 Volt battery (12 Volt charging), then the voltage should be between 7.9-12.2 Volts.

If the voltage is lower - it means the battery is faulty.

Method 6:Checking the display

It happens that the tablet turns on, but the screen is black. And it seems that the tablet does not turn on. You need to be sure that it is charging, then turn it on and wait 15 minutes. The tablet should warm up a little one of the side parts. If so, then there is a problem with the display itself. You need to disassemble the device and look at the contacts that connect the display to fee. The latch may have slipped , this happens most often due to falls.

Method 7. Repair at a service center

professional repair equipment;

5 years of experience as craftsmen;

1 month warranty on work performed;

availability of branded original spare parts.

If you want to save time and not put your device at risk, tablet repair in Odessa carry out outsourcing of IT service to the service center.

Quite often people complain that their tablet won’t boot. What to do in this situation? What actions will help “revive” the device without much difficulty? Is it possible to somehow turn on a gadget that refuses to work? Why does the tablet sometimes not boot at all? Understanding all this is not as difficult as it seems. And this despite the fact that there may be many reasons for such a phenomenon. It is enough to carefully remember what preceded the breakdown. So what if the tablet does not work and does not want to boot?

Classification of causes

It has already been said that many situations can be the source of the problem. There is a certain classification of them. It half helps to understand what happened and draw up a further plan of action.

Tablets and other devices may refuse to work and boot normally in the following cases:

due to hardware problems;
in case of failures in the installed software.

As a rule, in the first case, it is impossible to say for sure whether the gadget will be brought back to life. But in the case of software, it is most often possible to restore the tablet’s functionality without much difficulty.

No charge

Now a little about what specific problems users have and how to solve them. Tablet won't boot? "Android" or any other - it's not that important. The first step is to make sure that the device has enough energy to start working. As a rule, if it is not there, then the gadget will refuse to work.

Sometimes the tablet boots up and immediately turns off. In some situations, the screen goes blank after the manufacturer's logo. Situations like this indicate that the device has some energy, but it is not enough to normal operation with the system.

In such situations it is suggested:

Connect the tablet to the network, wait a little and try to turn it on again. As soon as the charge appears, the problem will disappear.
Replace the device battery. Sometimes it is a bad or faulty battery that causes the tablet to not boot.

Manufacturer

The next common reason is the manufacturer. Tablet won't boot? You shouldn’t be surprised by this phenomenon if we are talking about Chinese products. In particular, duplicates from well-known manufacturers.

If a citizen has Chinese tablet, then problems associated with turning on the device can be resolved using the following methods:

rebooting the gadget (constantly trying to turn it on);
repairs at a service center;
purchasing a new device.

In practice, most often Chinese devices are revived by sending them in for repair, or the problem is solved by purchasing a new tablet. With original gadgets, malfunctions and malfunctions occur extremely rarely. But no one can be 100% insured against them.

Viruses

Does your tablet turn on but won't boot? In fact, this phenomenon is not so rare. In practice, many users have encountered similar situations.

Problems with turning on tablets are sometimes caused by viruses that have penetrated the gadget’s operating system. Nowadays there are a lot of different infections that damage the OS of phones and other devices. mobile devices. Treatment will help bring the gadget back to life.

It is carried out, as a rule, in service centers. Users are not recommended to check and clean tablets themselves. Otherwise, you may experience a complete crash of the OS.

Settings

What to do if the tablet does not boot? Don't panic is the main thing. Most situations can be resolved without much difficulty. It is enough to know how to act in this or that case.

For example, sometimes the reason why a tablet won’t boot is due to broken operating system settings. You can "reset" them. After this step, the device starts working normally.

Hard Reset

Resetting settings on mobile devices is called “Hard Reset”. It is carried out according to a certain algorithm. The help of specialists is not needed here - everyone is able to cope with the task on their own.

Tablet won't boot? Before going through the possible causes of the problem, it is recommended to perform a “Hard Reset”. Activate this function is proposed according to the following algorithm:

Remove the SIM card and memory from the device. These are not required steps, but it is better to take them to ensure normal operation of the operating system.
Simultaneously press the power button of the device, as well as the volume controls.
Keep the buttons pressed for a few seconds. The device should vibrate and turn on.
On the screen, select “Settings” - “Format”.
You must select "Reboot" or Reset. The device will perform the mentioned action. The settings will be reset during the process.

This algorithm of actions will help to reset the settings to the warehouse ones. If this was the problem, then after the procedure the tablet will start working with renewed vigor.

Firmware

However, these are not all the reasons why the device under study refuses to work. As already mentioned, sometimes the problem lies in the software. Does the tablet not load beyond the logo or completely refuse to work normally? Then it is proposed to use one more technique. But it is better to use it after activating the “Hard Reset” option. What are we talking about?

About operating system firmware. Problems with this component lead to the tablet not loading. It is recommended to restore the firmware to its original state. How to do this?

For self-reset you can use the following procedure:

Press the power button on the device and the volume button at the same time.
Wait for the tablet to vibrate. As soon as it appears, release the pressed buttons.
In the menu, select "Settings" - "Firmware recovery".
Wait for the process to complete.

Please note that if it is impossible to enter recovery mode, the source of the power-on problem is hardware damage. Most likely, you will have to take the gadget for repair or simply buy a new device.

Flashing

Tablet won't boot? Another way to bring the device back to life is to flash the gadget. This process Doing it yourself is highly not recommended. In inept hands, flashing the firmware leads to the final “death” of the device.

That is why it is best to take the gadget to a service center. There, for a fee, they will flash the device. After this, the tablet will work like new. But incorrectly carried out flashing can cause a lot of problems for users.

Damage

Does your tablet turn on but won't boot? Or doesn’t react to actions at all? It is likely that there is mechanical damage. It occurs quite often in modern users. This phenomenon can be corrected using several methods.

More precisely, the following techniques are worth trying:

attempt to turn on the tablet several times;
take the gadget to a service center for diagnostics;
change device.

As a rule, mechanical damage can occur due to any negative impact on the tablet. For example, if the device falls out of your hands. Or he was crushed by some objects. Quite often, girls and teenagers encounter a similar problem, simply carrying a tablet in bags with many things.

Unfortunately, such situations are most often resolved by directly replacing the devices. There is no point in flashing or resetting settings. It is best to entrust all manipulations to professionals.

Repair

What to do if the tablet does not boot, and all the actions that could be taken have already been completed? In this case, there is only one thing left to do - contact the service center. Specially trained people, for a fee, will conduct full diagnostics devices, and will also help bring the tablet back to life. Of course, if this is possible.

Most often, this is the method that causes the least problems. The service center will be able to change the firmware and any damaged components of the tablet. Only in some cases even contacting such an organization turns out to be useless. This means that you will no longer be able to turn on the tablet - you will have to buy a new one.

In fact, you shouldn’t be afraid of a situation in which your tablet or phone doesn’t turn on. If you don’t want to spend a long time figuring out the problem, it’s better to take the device in for repairs right away. This is the safest and best solution.

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 software and are eliminated by flashing the firmware or reinstalling the broken 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 possible reason 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 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 during a break in tablet operation, 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. Moisture on electronic components may cause the tablet electronics to fail.

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, while over time the tablet's operating life 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 home or before leaving the tablet for a long period of time.

On the screens of any battery-powered electronic devices, a dynamic icon is always displayed showing 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 alternating voltage household network 220 V 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, it is enough to use the ends of the probes of a multimeter turned on in measurement mode DC voltage, touch the central and outer 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 with your own hands

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 electronic board of the adapter is not galvanically isolated from the household network and touching the exposed parts of parts and printed conductors is dangerous to life.

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 (pictured cylinder blue) 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 working 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, you will need complete replacement cord, 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’s already clear that a 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 cases when the tablet does not turn on when you press the power button after rash user actions with the software, such as incorrect installation 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. So press the restart button tablet RESET This is only possible with the help of 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 click on 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

Click on the correct one 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 broken button turn on Power, 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 of the back cover there are protrusions 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 by using plastic card very convenient.

Freed from latches back cover it 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 terminals 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; it’s obvious that the 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 equal to zero, and when released, 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 thin layer 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.

A tablet is a gadget that short time has become a permanent part modern life person. Compact and convenient, it allows you not only to stay in touch, but also to pass the time by reading books or playing games. But, like any electronic device, tablets from Lenovo begin to freeze over time.

And if with long response You can still come to terms with the fact that when the Lenovo tablet does not turn on, users immediately run to service centers. However, you shouldn’t immediately give the gadget into the hands of specialists and spend fabulous sums on diagnostics. In some cases, repairs can be carried out at home.

Why won't my Lenovo tablet turn on?

There are dozens of reasons why the Lenovo tablet does not turn on. Even the most expensive and flagship models gadgets may begin to freeze in the first months of operation. Sometimes it is quite difficult to determine the cause of a malfunction, but not impossible.

The tablet may not turn on due to mechanical damage. Often the last time the gadget worked was before it fell to the ground or into the water. Or, after installing software updates, the tablet stopped showing signs of life. It often happens that the Lenovo tablet freezes and does not turn on beyond the Android icon. And what should you do if it stops charging or is swollen? back panel? Advice and recommendations from experts will help you provide first aid to your gadget.

Mechanical problem

The first step after the owner realizes that the Lenovo tablet will not turn on is to determine the type of problem. The tablet may not work due to hardware or mechanical damage. If it was previously in the wrong hands, then it is necessary to carefully inspect it for chips and damage. Often, even the smallest scratch on the tablet body can cause a breakdown. In cases where chips or cracks were found on the case, experts do not recommend that gadget owners personally open the device and fix the damage. In more than ninety percent of cases, such “repairs” cause even greater malfunctions.

However, even if there are cracks and chips, you should not immediately take the device to a service center. First, you should make sure that the Lenovo tablet does not turn on precisely because of mechanical faults. You can verify this by conducting a series of tests on the hardware and software of the gadget.

Tablet electronics failure

Each gadget, including Lenovo tablets, is a small box containing the electronic components of the device. It can fail for many non-mechanical reasons: a power surge, high humidity, or even a manufacturing defect. Most of these defects are covered under warranty.

But sometimes even problems with electronics can be solved at home. Many people ask the question: if the Lenovo tablet does not turn on, what to do? For example, when did the gadget fall into the water? If you do not react quickly, the electronic “stuffing” of the tablet will not be restored.

When the device gets into water, you must:

Quickly place the tablet on a soft cloth.
If possible, remove the battery.
Dry the gadget with a hairdryer.

If the tablet has a non-removable battery, then you need to place the gadget in a bag of rice for several hours. After this, check the functionality of Lenovo. If the tablet still does not start, you will have to contact a service center.

Battery, charger and contacts

A dead battery or faulty charger is one of the most common reasons, for which the Lenovo tablet does not turn on. What to do in such cases?

If the tablet does not respond to the connected charger or being turned on, then experts recommend first checking the presence of voltage in the network. After this, you need to make sure that the charger is working: just connect it to another gadget. If it works, then you will next have to remove the back cover of the tablet and check the battery.

Most often the problem lies in the battery. After a certain service life, it fails and swells. In this case, it is necessary to replace it with an identical one. If the battery looks good, then it also needs to be removed and checked using a universal charger, or “frog”. If it starts charging, the problem lies in the contacts of the gadget. You need to clean them yourself or contact a service center for help.

It is a little more difficult to solve the problem when the Lenovo Yoga Tablet does not turn on, but at the same time it was equipped with non-removable battery. In this case, manually removing the battery is difficult and also violates the warranty terms. It is wisest to seek help from specialists. Also, the tablet may not turn on due to a faulty power button. Cleaning the contacts will help solve the problem.

Software "bug"

Lenovo tablets run on the Android operating system. Owners of such devices have access to an extensive catalog of applications: games, themes, organizers, training programs, and so on. But sometimes it is applications that cause the tablet to freeze or not respond to pressing the power button.

You can solve the problem using easy removal applications. If it was downloaded and installed on a memory card, then it must be removed and formatted. If the program is installed in the tablet’s memory, then only resetting to factory settings will help. Information on how to reset the parameters to standard without turning on the tablet should be found on the official websites of the manufacturers.

Faulty touch screen

A faulty touchscreen, or touch screen, is one of the rarest reasons why Lenovo tablets do not turn on. As a rule, in such cases the device responds to the power button, but the owner can no longer see the result of the work.

The touch screen itself fails quite rarely. To do this, it is necessary to inflict strong mechanical damage. Decide this problem It won't work at home. Only specialists from the service center can replace the matrix on the tablet.

Sleep mode

There are situations when the Lenovo Yoga tablet does not turn on after several minutes of inactivity. The gadget does not respond to touching the screen, pressing the power button and other actions. Lenovo tablets often go into Sleep Mode after several minutes of inactivity. Solving the problem is quite simple. Just connect the tablet to charger. After a few seconds, the screen will automatically light up, allowing the user to revive it.

You can prevent such “freezes” by changing the screen settings. In the “Display” menu, you need to change the time after which the tablet goes into “Sleep Mode”.

SIM card

There are many reasons why the Lenovo Tab tablet does not turn on. And one of them is a SIM card. If all of the above methods for resuscitating the gadget did not work, then before moving on to serious measures like resetting to factory settings, you need to check the SIM card.

Its loose installation may be the reason why the tablet will not turn on. Dealing with the problem is quite simple: just remove the back cover of the case or pull out a special sector of the SIM card. Next, you need to remove the card and reinsert it. If after this the tablet does not turn on, then you should move on to the next step.

Factory reset

If the Lenovo tablet turns off/on regardless of the owner’s commands, and all the methods described above had no effect, then restore correct operation The device can be reset to factory settings.

It is worth noting that a factory reset will entail data formatting: applications, SMS, contacts, etc. will be erased from the phone’s memory.

In order to carry out this operation, you need to go to the “Options/Settings” menu. Next, scroll the window to “ Backup and reset." The last item in the menu will be “Reset with restoration of factory settings”. After clicking, the system will notify the user that the process will take some time and all personal files will be erased.