Many tablets have screen problems. To begin with, the touch screen is the main means of controlling the gadget. In connection with its structure and sensitivity, various problems arise, so today we will consider the question of why the sensor on the tablet does not work.

Mechanical aspect

The tablet has been dropped or liquid has been spilled onto it. In this case, not only the sensor can fly, but the entire system as well. Also, the sensor may break, then it needs to be replaced. The screen can be scratched, covered with plaque, etc., then you need to change the film or protective glass. The fault can be rectified simply by cleaning the display. To clean the screen, a lint-free microfiber cloth is required. You will also need a cleaning fluid (except for water and based on ethyl compounds). As a last resort, it is worth calibrating the screen, provided that there is a reaction on the tablet, and the data is not displayed correctly. Alternatively, you can simply reboot the device.

Software glitch

In the event that the reasons are associated with a software failure, you need to try to do a "hard reset". Then you need to reboot the device. It is advisable to run programs for cleaning the system registry (example: WinFixer, Cleaner4), fixing errors "RAM". Don't forget to clear the tablet cache, which is also loading memory. And at the same time, check the tablet for viruses using an anti-virus program. often we can download applications and games with viruses, which can affect the operation of the sensor. Perhaps you need to install a more functional antivirus.

Lack of RAM

Lack of RAM, its load also negatively affects the work. Therefore, it is worth monitoring its volume. For example, once again it is worth freeing it up by deleting unnecessary files and applications, or transferring them to another medium.

Loaded processor

The processor on your tablet shouldn't be heavily loaded either. Especially if you have a not very powerful chipset preinstalled, and you downloaded “heavy” games and programs to your device. In this case, the operating system may start to "slow down", applications will crash, the system will not work correctly, and then the touch screen will start to slow down. To prevent this from happening, you need to track the volume of downloaded games.

In most cases, you can fix the problem yourself, but you can always take your tablet to a service center.

This article will tell you about the reasons why the touch screen does not work on an Android phone or tablet, as well as what repair and diagnostic procedures you can carry out yourself, and what is the best way to contact the service center.

This article is suitable for phones and tablets of all manufacturers of Android devices: Samsung, LG, Sony, Huawei, Xiaomi, HTC, ZTE, Fly, Alcatel and others. We are not responsible for your actions.

Let's look at the most common reasons when the sensor of an Android device fails:

• Accidental gadget malfunction.
• Installing an incorrect firmware of the device led to a breakdown of the sensor.
• Internal components have broken (loop, board, etc.).
• The smartphone's memory is full, which is why it cannot service the touch screen correctly.
• The work of applications led to the freezing of the gadget and the device sensor.
• SIM card or SD card is unstable.
• The sensor is peeling or dislodged.
• The sensor is physically damaged after being hit.
• Moisture got inside the gadget, which caused the contacts to oxidize.
• The device has overheated due to various reasons, in particular, due to a sharp temperature drop.
• On the screen, the protective film does not fit tightly enough to the product screen (dirt, bubbles between the film and the screen, etc. are visible).
• There is a lot of grease and dirt on the screen of the device.

What if the sensor does not respond?

To restore the normal functioning of the sensor of a tablet or smartphone, follow these steps:

Sensor recovery (safe mode)

To boot in safe mode, turn off the gadget completely (including by removing the battery). Then we perform a long press on the Power key to turn on the device. When the product logo is displayed on the screen, press the power button, and then hold down the Volume Down key. We press this button when the device boots up, and then the inscription at the bottom of the Safe mode screen will be shown.

• We update the OS of the gadget (if updates are available). We also install all updates to the existing software on the device, which will solve the problem of the sensor.
• If there is a suspicion that the internal components of the smartphone have broken, then we contact the service center with the problem.
• If the incorrect firmware is installed, you need to install the "native" firmware for the gadget.
• A radical method is to reset the settings to the factory settings, using the Recovery Mode. All information on the device will be lost (including the phone book). To do this, go to Recovery Mode, where we select "Wipe data / factory reset", and then specify "Reboot system now" to reboot the device in normal mode.

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Calibrating the Android Screen

The calibration process includes adjusting the screen in order for the gadget to execute commands by touching the sensor with fingers or a stylus. Without such adjustment, the product will work, but during operation there are undesirable consequences, including the failure of the touch screen.

On Android, there may be a problem of “disobeying” the touch screen. The system treats touching with the stylus or finger at a certain point on the sensor as other commands. There are also situations when only after the 3rd or 4th attempt the sensor executes the executed commands. Often the reason for these problems is associated with the incorrect operation of the screen itself, so you need to calibrate the touchscreen of the device.

Correct and urgent calibration of an Android gadget may be required when the device is accidentally dropped into water or from some height. Calibration of the sensor is also needed after repair work associated with replacing the screen, the appearance of a water stain under the glass and after other actions that have been transferred, even seemingly insignificant.

To check the need for this procedure, follow these steps:

• We remove a special protective film from the screen (to ensure the most accurate sensor operation).
• We enter any number or letter.
• When there is a discrepancy between the button pressed on the device display and the displayed information, the touchscreen setting is required.

Basic Calibration Methods

There are two ways to bring the knocked down sensor back to its normal position:

• Application of special applications for the Android system.
• Self-correction.

It is important to remember that for some brands the calibration steps are almost the same and are considered identical. Manufacturers of Android gadgets can often use 2 types of sensors:

• Capacitive - they are used in most devices, they are more reliable and of high quality.
• Resistive - screens that are manufactured using this technology often break down, so tuning is more in demand here. Such screens are almost never used at the moment - these systems are only in budget or outdated models.

Calibrating the screen using Android

If you do not have access to the Play Store catalog, you can calibrate the device screen using Android. We follow the step-by-step instructions:

• Go to the "Settings" section of the device.
• We select the menu "Phone settings".
• We find the item "Calibration, press the button".
• A cross-target should be displayed on the screen, inside of which there is a dot.
• We press this center of the formed target at least 3 times.

After the performed actions, the gadget will independently make a memorization of the touches performed. It turns out that the calibration can be considered complete. After completing the setup procedure, you need to check the operation of the touchscreen by the result of pressing certain characters on the screen.

Android Screen Calibration Apps

Sensor adjustment can be done using special applications. The necessary programs are freely available to carry out the calibration. The applications are simple to install and operate, but the main thing is to get an effective and positive result from the use of any of them. In Play Market you can find similar free applications:

• Clinometer.
• TouchScreenTune.
• Power Bubble and others.

For example, the Power Bubble app has a great interface that has additional accessibility features. To start the calibration, you need to launch the application, and in the settings select the option for the orientation of the product screen (or set the "Auto" mode), and then calibrate according to the level.

The weakest point in any tablet is the screen. Of course, from year to year, manufacturers install more and more durable and improved glass, but even they sometimes fail. And today we will figure out what to do if the tablet does not respond to touch. Touchscreens are susceptible not only to mechanical stress, but also to physical ones: drops, water, scratches and even cracks. Thus, dropping your gadget or pouring it with morning coffee, you can say goodbye to the correct recognition of clicks. On the other hand, the physical impact is not always the problem: sometimes the display refuses to recognize fingers in certain applications.

What to do if your tablet doesn't respond to touch

In the event that your device is still under warranty, you should not try to repair it yourself. In the case of physical damage, it is also better not to meddle - you run the risk of doing more harm during repairs due to negligence. It is all the more desirable to have special equipment and knowledge of the internal arrangement of the elements. Therefore, trust the professionals.

By the way, in some tablets you can replace the sensor itself, while in others it comes with a matrix to save space and improve picture quality due to the absence of an air gap. In the second case, you will have to pay for the replacement of both the sensor itself and the matrix.

Simple recovery methods

In fact, in most cases, you can fix the malfunction with improvised means. Let's figure it out:

1. Perhaps the tape was incorrectly pasted and now the clicks are recognized every other time. It is necessary to peel off the film, wipe the display with a soft, lint-free cloth so that no stains or streaks remain, and then stick the film again. It is best to take a new one, but if the old one also “sticks” well and has not lost its properties, you can return it to its place;
2. If the root of the problem lies in the software and just a couple of minutes ago the device worked correctly, and now it does not recognize pressing, you should restart the tablet. Of course, since there is no access to the screen, you will have to use one of two methods: remove the battery or hold down the “Power” button until the tablet is turned off;
3. In case you have a very old gadget or imported from China, a resistive-type display can be installed in it. That is, it reacts not only to fingers, but also to pressing any other object. Calibration can help here, but on condition that touches are not recognized accurately. For example, when typing a message, click on "Y", and you will always find yourself on "C". Go to the settings and find the item "Calibration" there, tap on it and follow the prompts of the system;
4. Does the tablet stop responding to clicks in certain applications? Try reinstalling them. If this does not help, then there is a possibility that the software on your device is outdated or the game / application developer simply forgot to add it to the list of supported gadgets. In the first case, an update will help, in the second, you will have to wait for actions from the developer;
5. Physical impact - liquids, condensation, shocks and falls. If, because of them, the tablet has ceased to function, then the road to the service center is provided to you.

Do not forget that if, nevertheless, you decide to see what happened from the inside, then do not damage the cables (contacts) that connect the board and the display, but we still recommend not watching the video, but go to the master!

Nowadays, tablets are touch-sensitive and controlled primarily using the touchscreen. If for some reason the touch layer on the tablet stops working, it loses its functionality and without timely repair it can go to the trash can. Is it possible to help the device with such a breakdown?

There are a lot of reasons why the touchscreen does not work correctly (the bottom of the tablet does not work). Unfortunately, it is impossible to describe them all in one article, especially since you still need to write about how to restore performance, so I will try to just discuss the most common options for why the sensor does not work well. Among them are the following:

• the most basic is screen pollution. Sometimes you can see an incredibly dirty screen, you just wonder how it was brought to this. So if you also do not like your device, this reason must be eliminated, because dirt can lead to the fact that in some places the sensor spontaneously works;
• software failure is not the most common cause, but it also takes place. If you install a lot of third-party programs, they can conflict with each other, causing a wide variety of system failures, so when the screen on the tablet partially does not work, this may be due to a conflict of third-party software.
• mechanical damage - if the sensor does not respond to touch in principle, this may be due to device injuries resulting from inaccuracy. If you dropped the device and after that immediately encountered problems such as the inability to unlock it, the reason, I think, is obvious. Below there will be a detailed manual on what to do if the touchscreen does not work due to mechanical damage and how to replace the screen with another one.

What can be done to prevent breakage

First of all, take a rag (glasses or monitor cleaner will work) and thoroughly wipe your mobile phone from water and dirt. Wipe all parts of the touch glass, especially the bottom - this half is particularly malfunctioning and malfunctioning. Even if you suspect another cause of the breakdown, it will not hurt to clean it. If you are lucky and the problem is fixed, congratulations. If not, proceed to further actions.

Fixing System Crash Using Hard Reset

Third party software conflict can be resolved by Hard Reset or System Reset. Pull the memory card out of the device in advance: it can also affect its functioning, due to the presence of viruses. Perform a full factory reset, after which you need to clear the system cache and registry. To do this, you can download any application, for example, WinFixer or Cleaner4.

It helped - put the card back in place and check it for viruses using any antivirus. It didn't help - you probably have a damaged hardware device. This means it is necessary to change its constituent parts.

Another case is that the sensor does not work after the firmware. Look for the manufacturer's website for stable firmware versions for the device.

How to fix a tablet yourself

In principle, you can change the touchscreen loop by contacting any technician. But besides the fact that you will pay for the new component of your device, you will have to give it all out for the replacement process. If you don't want to pay, read the manual on how to repair a touchscreen without contacting a specialist. Don't worry, it's not that hard.

Use any durable thin object to remove surface features until you reach the display.

The display is connected to the matrix either monolithically or separately. Remember by what method yours is attached specifically, since the screens differ from each other and you will need to know which one to buy.

The sensor also lies on the matrix - it can be attached with or without wires. In the presence of wires, be extremely careful and extremely careful so as not to harm again. It must be removed from the glue, for this we heat the surface to 60 degrees (the easiest way is with a hair dryer. Do not overheat one of the sides, so as not to harm the glass). After heating, the adhesive should easily come off the matrix.

How to glue the touchscreen after the steps above? Along with the new part, a special glue is included in the kit. First, we carefully apply the glue, and then we put the detail on it, fasten it with care.

Well, now you know how to replace the touchscreen with your own hands in case it stops functioning. If it seems too difficult for you to replace the sensor on the device yourself, contact a specialist for repair. Of course, the question is about money, and a specialist can bill you with a tidy sum for seemingly simple actions.

After all, what is there - remove the part from the glue and put a new one on the glue, but everything must be done with the utmost accuracy, otherwise you risk damaging the matrix and generally losing the opportunity to bring the tablet back to life. So before doing any manipulation, I highly advise you to think it over carefully.

Conclusion

I hope our tips have helped you. Try to follow the universal algorithm described above, or watch the video with instructions below. See you on the site!

Video instruction

In some cases, there is nothing serious behind it - it is common for technology to fail for reasons that users do not understand. Therefore, you should not immediately carry the gadget for repair: you can try to "reanimate" it at home. So, what problems can the owner of the device face and what to do if the sensor does not work on the tablet?

If the sensor does not work on the tablet: ways to solve problems

1. Cleaning the display. Simple, banal, but often very efficient way. There is slight dirt on the screen that prevents the sensor from reacting, or the protective film is poorly applied. All of this is easy to fix. It is best to use a special lint-free cloth (such as microfiber) and liquid to clean your monitors.
It will help to solve the problem of the sensor if it hangs "just like that". If the keys do not work at the same time as the screen, you need to remove the battery (if possible), wait a few minutes and then turn on the tablet again.
2. Return to factory settings. Tablets of different brands have their own Hard-reset features. In most cases, you need to simultaneously press two keys - "home" and "volume up", then - "power" (screen lock button). A message will appear on the screen stating that the information is being cleared. After that, the device will automatically reboot. But you need to remember that, unlike a standard reboot of the tablet, this method entails the removal of system information. But sometimes you don't have to choose. If you are performing this procedure as a preventive measure, it will be useful to take care of creating a backup copy of the existing files. This method can help solve the problem of the sensor not working if the failure is caused by a virus. Also, it is not uncommon for the tablet's memory to be overloaded, as a result of which the device begins to freeze, and the user mistakenly associates the problem with sensor malfunctions.
3. "Emergency help". Problems with the touchscreen are often the fault of the users. So, for example, if you spill water on the device, you need to disassemble and dry the gadget as soon as possible. If another liquid (juice, sparkling water or, even worse, gasoline) became the cause of the breakdown, you will hardly be able to do without the help of a specialist. Please note: you cannot put the tablet (or rather, its parts) on the battery, you cannot dry it with a hairdryer. ways to solve this problem will be to "immerse" the parts in rice groats, which should collect excess moisture. Here you should not rush - it is recommended to try to turn on the tablet again after 3-4 days, not earlier.
4. Replacing the sensor. Unfortunately, the touchscreen can malfunction without the ability to return it to a working state - no tablet is insured against this, regardless of its price category. There are both factory defects and "secondary" defects caused by the negligent use of the device.

Buying a new sensor is not a cheap pleasure. In addition to the fact that the price of a new sensor itself can reach half the price of a tablet, you will need to “fork out” for the services of a master. But in some cases, you can try to repair the gadget yourself.

There are many visual video tutorials on this topic on the net. In reality, replacing the sensor is not that difficult. First you need to disassemble the tablet, after removing all the screws and other small parts. It is important to remember the sequence of disassembling the device.

Next, you need to disconnect the sensor. Most often it is attached with glue. To avoid damage to the device, exposure to high temperatures (about 60 ° C) is required. Due to the lack of special devices, you can first use a hairdryer.

After disassembling all parts, perform the internal "cleaning" of the device (if necessary). Then attach the new sensor "in place" using special double-sided tape or glue.

If the home repair is successful, calibrate the touchscreen using the appropriate settings.