Samsung A3 does not respond to touch. Touchscreen calibration on Android phones and tablets. Screen calibration using Android

There are many factors that can cause a Samsung sensor to not respond to touch. Quite often, the root cause of such circumstances is mechanical damage; in addition to them, there are also software faults, which can only be identified and corrected at a service center.

First, inspect the appearance of your smartphone. Due to clogged dust or oil stains, the touchscreen may not respond properly to the user's touch. Therefore, you need to regularly wipe the screen with a microfiber cloth. This routine cleaning is ready to return it to working condition. As a preventive measure, train yourself not to use your phone with dirty or wet hands.

A poorly installed film may cause the touchscreen to not respond to finger touches. This happens due to air particles and dirt that accumulate between the surface of the display and the protective film. To solve this situation, you need to peel off the old film and stick a new one.

Sometimes the Samsung touchscreen does not work due to the fact that the commands received by the device may not be perceived correctly. In this case, to return the system to working condition, just restart the phone.

Carefully inspect the display for cracks. Even the smallest cracks can cause your phone to slow down. As a result, the touchscreen sometimes responds to touches only in certain areas. Replacing the touchscreen on your phone in our service center will help you return your phone to full functionality.

If the touchscreen on your Samsung phone does not work, this may be due to a breakdown or failure of the touch controller. Very often, module failure occurs after falls or strong impacts. It can also be caused by moisture getting inside. The solution to this problem is to replace a new module.

The touchscreen on your phone may break down due to malfunction of various parts. For example, failure of the printing module or its components caused by moisture penetration or mechanical damage may result in failure. Only a complete diagnosis will help identify what exactly is broken.

Modern mobile devices cannot be imagined without touch screens. Therefore, it is necessary to decide what to do if the sensor on your phone does not work only after studying the events that led to the breakdown. The screen is the main part of modern smartphones, without which they lose all functionality.

In order to find out why the sensor on your phone does not work, you will need to carefully examine your smartphone. Sometimes problems in the phone are visible to the naked eye, for example, if the screen is broken, and in some cases the functionality may be lost for no reason. Moisture ingress, rough mechanical impact and much more can affect the serviceability of the device.
If the source lies in a software glitch, then a situation may occur where the gadget does not respond correctly to your touch. Such problems often arise due to the actions of the owner himself, who, through negligence or inexperience, made changes to the operation of the system.

Common touch screen problems

The most common reason why the touchscreen does not work is mechanical damage. Impacts and other impacts can lead to negative consequences. The most neutral will be chips; more serious problems will appear when a “cobweb” forms, in which the device can continue to function.

Since modern smartphones are quite fragile devices, even after falling from a height of human height, it stops working. If the device continues to function, and damage is caused by the formation of cracks in the case or its deformation, or the cessation of operation of part of the screen, then it is necessary to contact a specialist as soon as possible for repair work.

Another popular cause is moisture ingress. Despite the fact that the device looks like a monolithic device, it has small cracks and gaps through which liquid gets onto the main board.

Moisture and liquid entering the phone body

Moisture entering a cell phone leads to the beginning of the oxidation process of the contacts and the board. If the gadget finds itself in a similar situation, then you should not disassemble the smartphone unless absolutely necessary. The first thing you need to do is dry the device. If drying does not produce results, then it is worth taking it to a specialized repair center, which is especially true for expensive models, interference with the internal circuitry leads to irreversible consequences. During repairs, you can use a cheap replacement device that will receive calls and SMS.

Oxide Elimination

In some cases, after moisture gets inside the gadget, after a certain time it will begin to work, but poorly or incorrectly. In this case, you can try to independently eliminate the oxide that appears upon contact with the liquid.

To do this, you will need a tool with which to remove the oxide (a plastic card, a screwdriver, and so on). Also needed: alcohol, toothbrush, eraser and napkins. Before disassembling your smartphone, you need to read the instructions, which can be found on the Internet.

The cleaning procedure must be carried out carefully, as any awkward movement can lead to additional damage. The disassembled gadget must be folded onto a sheet or napkin so that it can be easily assembled, as per the drawing. Each place should be wiped with alcohol, an eraser and blotted with a dry cloth.

If traces of rust are found, it is removed with a toothbrush. The area is treated with alcohol, the remaining corrosion is removed with an eraser.

It will be especially difficult in cases where the cause is a sweet drink. Exposure to such a mixture has a chance to damage the gadget, and without the intervention of a specialist, repair will be impossible.

Stained display

If the display becomes dirty without damaging the screen, then you just need to thoroughly wipe the sensor with cleaning fluid, and then remove the remaining moisture with a dry cloth. To preserve the display, it is recommended to use a protective film that can be easily applied and removed if dirty.

Damage to the cable

Damage to the device cable is one of those causes of breakdown that cannot be fixed at home. Therefore, if the sensor sometimes does not work correctly, you should contact a specialist who can restore the device’s functionality with a guarantee.

Software glitch

Reboot your smartphone. In some cases, changed software operation settings will not be applied after a system reboot.
Use the built-in sensor testing program. To do this, you need to enter a combination that is unique to the device of each brand.
Check the temperature of the device and place the device in favorable conditions.
Check the operation of the memory card and SIM card.
Boot the gadget in safe mode.

In some cases, the problem can be solved with these simple methods. If your attempts have not yielded any fruit, then you should contact the experts.

One of the most common problems faced by smartphone users is the Samsung touchscreen not working. The cause of the situation could be anything, from simple screen contamination to mechanical damage that requires the involvement of an expert. Below we will consider in what cases the touchscreen of Samsung smartphones can fail, what to do in such situations to fix the problem, and how much repairs can cost if you contact a professional.

Causes of the problem

First, let's look at the main reasons why the sensor does not work on Samsung. For convenience, we will divide them into several categories.

Simple reasons:

Dirt or water getting on the glass surface. A dirty display often causes the Samsung touchscreen to not work. This also applies to situations with moisture ingress. That's why take a look to avoid such problems.
Error in installing film on the display. Another reason why the sensor on a Samsung phone does not work well is incorrect installation of the film coating on the surface. For example, dirt and air could get between the film and the screen, which is why there is no finger contact with the display.
Water ingress. If there is a sudden change in temperature, condensation may appear inside the device. The situation is even more complicated if the smartphone is completely filled with liquid (juice, water, beer and other drinks).

Mechanical reasons:

Cracks on the display. Sometimes even a small scratch can cause a Samsung touchscreen to not work. Typically, this appears on a specific part of the monitor where there is damage.
Loop break. A common situation is when the cable connecting the Samsung screen and the main part of the device has completely or partially come loose inside the device.
Damage to the microcircuit which controls the Samsung touchscreen. This problem could arise due to the phone falling from a great height and damaging its internal components.

Hardware failure:

The device does not receive signals due to software problems.
Malfunctions in the operation of the control chip.

If the touch buttons on a Samsung do not work, the reason, as in the cases discussed above, may be damage to the cable or a hardware failure of the smartphone itself. Such problems often appear after mechanical impact.

How to solve the problems that have arisen?

Knowing the approximate cause of the malfunction, you can decide on the second point - what to do if the phone screen does not respond to touch (for Samsung). If we are talking about normal screen contamination, just wipe it with a special cloth. In case of mechanical damage, repairs may be required and a technician may be required to solve this problem.

The easiest way to solve the problem is if the touchscreen on your Samsung does not work due to a hardware failure. In this case, you can take the following steps.

Restart your smartphone

If the touchscreen on your Samsung smartphone suddenly does not work, try turning it off and turning on the power again. In many cases, the problem is resolved after the first reboot. If the phone cannot be turned off using the standard method, use a long press on the power button or briefly remove and install the battery (if possible).

Take out the SIM card

If for some reason the sensor on your Samsung phone does not respond, turn off the device and remove the SIM card from the device. After a few seconds, return the SIM card to its place and check whether the Samsung touchscreen works or not.

Boot the device in safe mode

Another method to solve the problem is to log into Samsung without third-party applications. There are often situations when malfunctions are caused by the action of some application. Booting your smartphone in safe mode allows you to confirm or refute this version. To do this, turn off the device, press the power button for a few seconds until the Samsung logo appears. After that do the following:

release the Power button and immediately press the Volume Down key;
hold it in this position until the device is completely rebooted. An inscription should appear at the bottom left that Samsung is working in safe mode;
check the functionality of the touchscreen.

If necessary, remove the unnecessary application.

Give your smartphone a rest

The Samsung touch screen often does not work due to overload, which manifests itself as freezing or slow operation of the smartphone. Such situations often arise when the user plays heavy games or watches movies. If the sensor suddenly freezes in one of these situations, leave the phone alone for a while. After 30-40 minutes, check again whether the touchscreen works or not.

Clear RAM cache

One of the reasons for touchscreen malfunctions is GPU overload. To clear “dead” pixels, you need to remove the extra RAM cache. After that, close all Samsung applications and restart the device.

Do a hard reset

One of the cardinal steps if the touchscreen does not work on a Samsung phone is to hard reset the device. In this case, all unnecessary data is deleted from the smartphone, and the latter returns to factory settings. The simple algorithm of actions is as follows:

press the volume up, power on and home buttons until the word Galaxy appears;
release the power button but hold the other keys;
after Android appears, release the remaining buttons;
select the option to reset the phone to factory settings;
wait until Samsung restarts.

The last measure is performed in extreme cases, when you are sure of a software glitch, and after using other methods the touchscreen does not work. In addition to the steps discussed above, you can do the following:

use Samsung's built-in software to test the sensor;
check the temperature of the device and if it overheats, let it cool down;
Make sure the memory card is working properly.

If none of the actions yielded results, and the touchscreen still does not work, contact the specialists.

Is it possible to do something on my own?

In case of a software failure, you can take the steps mentioned above and restore the functionality of the touchscreen. The situation is more complicated when it comes to mechanical damage or water getting into the device. Let's look at the main recommendations in more detail.

Moisture ingress

If water gets into the phone, oxidation appears on the contacts. Over time, important contact connections become damaged. As a result, the sensor may fail. Many people make the mistake of immediately disassembling the device. It is not necessary. At the initial stage, it is enough to dry the device with a hairdryer or purchase a special drying kit. If these steps do not bring results, take the device to a service center for repair.

The technicians determine why the touchscreen does not work and what measures to take to solve the problem. Disassembling and attempting to repair the phone on your own can lead to irreparable consequences, including the permanent breakdown of your Samsung smartphone. During repairs, you can take some kind of budget device that can receive calls.

Oxide removal

If drying does not produce results, or moisture entered the device a long time ago, oxidation may appear on the contacts. To restore normal operation of the device, this plaque must be removed. If you have experience repairing phones, you can try to remove the oxide and restore the operation of your smartphone. The algorithm of actions is as follows:

Prepare a small screwdriver, toothbrush, alcohol, grater and napkin.
Study the instructions for disassembling the device (available on the Internet).
Disassemble your Samsung smartphone and lay out the parts on a clean surface so that you can quickly assemble the device later.
Wipe the contacts with alcohol, an eraser and blot with a dry cloth.
If you find traces of corrosion, remove them with a toothbrush, and then treat the problem area with alcohol. Remove any remaining rust with an eraser.

If the touchscreen does not work due to a sweet drink spilled on the Samsung, it is difficult to restore it on your own. It is better to seek help from a specialist.

Damage to the cable

Violation of the integrity of the loop is one of those situations that cannot be solved at home. To fix the problem, it is better to contact a service center and entrust the work to a specialist. The specialist knows how to check the touchscreen on a Samsung, and what signs indicate a broken cable.

Problem after replacement

Some users replace the display on a Samsung and then find that the touchscreen does not work. In this case, take these steps:

perform a soft reset;
do the repair again, but from the very beginning, and when connecting the screen, check that it works;
make sure there is no strong pressure on the screen;
If the touchscreen on a Samsung is partially working, the device may be damaged.

The steps discussed above can be done if you have experience in repairing smartphones. This is especially true in situations that involve disassembling the Samsung and carrying out restoration work inside the device.

On which models does the problem most often occur?

Samsung does not keep statistics on displays with problematic touchscreens. In all devices, this element is reliable enough to serve for a long time without failures. Theoretically, a malfunction can occur on any device in the event of a mechanical shock or software failure. In particular, there are complaints on the Internet about the sensor being disabled in the Samsung Galaxy A3 and A5. Other devices from this series are also at risk.

How much does the repair cost?

As can be seen from the article, many problems cannot be solved without the involvement of a specialist. The technician knows well how to change the touchscreen on a Samsung, what to do to diagnose the problem, and how to repair the problem. Prices for repair work vary widely and depend on many factors - requests from the service center, the severity of the breakdown and the phone model.

On average, replacing glass on a Samsung will cost 600-700 rubles. If you need to change the touchscreen, you will have to shell out the same amount somewhere. Repairing power circuits (about RUR 1,500), cleaning after filling with liquid (RUR 1,500) and data recovery (RUR 1,500) will cost more. In general, the work of a master costs from 300 to 1500 rubles, depending on the volume and complexity of the work.

In order not to worry about the touchscreen not working on your Samsung, you should take precautions. Let's highlight the main steps:

To protect your Samsung touchscreen, use high-quality film or glass. Such products protect the screen from mechanical damage in the event of a fall or impact with a hard object.
Maintain the warranty for the entire stated period. This will save money on repairs (if necessary). For example, if the cause of the failure is a broken cable or the display does not work. Having your warranty handy allows you to get help (sometimes free) from Samsung.
Install reliable antivirus software to protect your OS from viruses.
Before launching the application, make sure that it works properly and does not cause problems with the Samsung touchscreen. Alternatively, it's worth reading a few reviews.
Try to avoid games with heavy graphics, as this increases the likelihood of touchscreen failure.
Do not play games or talk on the phone while charging the battery. In this case, the likelihood of overheating increases significantly.

Now you know why the sensor does not work on a Samsung phone and what to do. The appearance of a malfunction is not a reason to panic, because in most cases the problem is solved by simply rebooting or taking other measures discussed in the article. If none of the methods helps, go to a specialist and trust him to restore the device.

It is running Android. The touchscreen (sensor) works on its own, it works some time after pressing, it is dull, lags, and does not work correctly. What to do and how to fix it?

Many users encounter a problem when phone or The Android tablet starts acting up. It seems that it didn’t fall anywhere and wasn’t “watered” with anything, but it doesn’t work as it should.

For example, the device has problems with a touchscreen, i.e. touch input (“sensor”) does not work correctly. The reason for this may be:

1st: Software glitch- i.e. the problem is a software glitch

2nd: Hardware failure- i.e. the problem is in the hardware (i.e., replacement or restoration of spare parts for the gadget is required)

However, do not rush to get upset - in 90% of cases there are problems in the operation of touch input (touchscreen) smartphone or Android tablet is to blame software glitch which you can easily fix on your own.

Fixing a software glitch:

Method 1. Quite simple - go to "settings", find there "backup and reset", in which you choose full reset settings with deletion of all data. Be careful, using this method is often effective, but it entails deleting all photos, contacts, passwords, music, games, videos and, in general, all information stored on your smartphone e or tablet e. Therefore, first save everything you need by connecting the gadget to your computer. If this method does not suit you, or if after this the problem is not resolved, see Method 2.

Method 2.

Based on solving touchscreen problems phone number and tablets based on Android by introducing additional software. Utilities that control all processes inside gadgets. Today, there are quite a lot of them, however, the fewer functions an application contains, the more effective it is, as a rule. The best way to monitor system functions, corrects, and correct all possible settings and synchronization errors is a small, easy-to-use, free utility for Android-based devices. You can download the application from Google Play and see its additional options in the description. After installing the application, all that remains is to launch it. Further, in principle, nothing more is required from you. The application will take full control of the device's functions. (By the way, among other things, the gadget will begin to charge 20% faster, and its performance will also increase significantly, which will affect the loading speed and operation of all applications, games, and the system as a whole. On average, after scanning, the system runs at 50% faster.)

In addition, it is worth cleaning the system using a NORMAL antivirus. Best suited for this task Kaspersky antivirus , which you can download. Unlike the “multi-cleaner”, the Kaspersky Lab software is paid, therefore, if you do not have the opportunity to install such protection, you can skip this step...

Method 3.

Changing the device software, or as it is also called "re firmware ". This method, as a rule, requires certain skills and can be solved by contacting the Service Center. To carry out this task yourself, you need to contact the website of the manufacturer of your device, download the utilities necessary for flashing the firmware and the firmware itself, and then reinstall it on your gadget.

If none of the methods brings results, unfortunately, you will have to contact the Service Center for repairing your tablet a or smartphone a.

The touchscreen (sensor) on an Android phone or tablet does not work well. The touchscreen (sensor) works on its own, it works some time after pressing, it is dull, lags, and does not work correctly. What to do and how to fix it?

Touch control has become an undeniable advantage of smartphones over conventional mobile phones. It not only made the interface more convenient and intuitive, but also significantly increased the capabilities of various applications, especially games. If the sensor does not work on Android, the smartphone turns into a practically useless device, losing 90% of the available functions. From this article you will learn how to protect your phone’s touchscreen, what malfunctions there are, how you can fix the sensor yourself, and when you need to contact a service center.

Reasons for sensor failure

All types of touchscreen breakdowns can be divided into three types depending on the nature of the malfunction.

Incorrect reaction to touch

The smartphone responds to touches on the screen, but perceives them partially or incorrectly. On special forums people often ask why part of the sensor on an Android phone does not work. There may be several reasons for this:

Screen dirty. Grease or dirt from your fingers gets onto the display and the sensor can no longer accept commands. Typically, such spots occupy a certain area in which control does not work. In this case, you need to wipe the display with a damp cloth and no longer touch the phone with dirty hands.
Incorrectly applied protective film or glass. These are two popular and necessary accessories for a smartphone, since replacing them is much easier than replacing the display in case of mechanical damage to the phone. But if they are glued incorrectly, the display does not respond to touch in certain places due to air or dirt accumulated under the protective shell. The film or glass must be removed, the screen cleaned and the new protection correctly applied.
Mechanical damage to the display, in which part of the sensor does not work. This is usually accompanied by a noticeable web of small cracks on the screen. In the best case, you will have to replace the glass on the screen or the touchscreen, in the worst case, you will have to buy a new display, which in flagship smartphone models can cost a third or sometimes half of the entire device.
Calibration failed. You press in one place, and the sensor reads the touch in another. This is easy to fix. In the next paragraph of the article we will tell you how to deal with this.

Spontaneous commands without touching

It also happens that the sensor lives its own life. This group of touchscreen malfunctions involves working with constant malfunctions. For example, you don’t touch the screen, but the smartphone receives commands, and you can even see the visualization of your touches. In this case with your phone the following:

Software glitch. Errors in the Android OS are not uncommon, because some people write the software, others make the components, and still others assemble smartphones. Often crashes occur after installing new programs or when updating the OS. Therefore, when this malfunction occurs, the first action is to reboot the phone. If this does not help, you should remove recently installed applications and roll back the OS to the previous version. The last resort is a factory reset, which deletes all personal information but eliminates any software glitches.
Dust or moisture has gotten inside. The sensor itself “presses” the screen if its contacts or control board are clogged with dust or oxides due to moisture trapped inside the device. We will look at this error in more detail in the next paragraph.

Touchscreen does not respond

It happens that the display does not respond to touch at all, although outwardly there are no signs of damage. In this case, most likely:

The control board is damaged. It could break due to a blow from the phone or due to dust and moisture getting inside. The absence of external damage when the phone is dropped does not mean that its components remain safe. In addition, the effect of such falls can accumulate. It happens that the cable has simply moved away from the contact, and to restore the screen operation it is enough to return it to its place.
The cable is completely or partially broken. The reason is mechanical damage. But if the sensor turns on every other time, it means that some contacts are damaged and the cable must be replaced. If you have the tools, spare parts and due care, you can do this yourself, but it is recommended to contact a service center.

How to fix a broken mobile phone sensor

It’s not always the case that if you have problems with your touchscreen, you should immediately go to a service center. In the previous section we provided solutions to the simplest breakdowns, and now we will look at several more serious faults.

How to calibrate the touchscreen

If the sensor is pressed in a different place, its operation needs to be adjusted using calibration. There are two ways to do this.

Firstly, the official Google Play app store has special programs that are free to download. Their disadvantage is a huge amount of advertising, so after one use they can be safely removed.
Secondly, Android OS has a calibration option in the phone settings. The difficulty is that in different versions of firmware and shells from manufacturers, the required menu item is located in different places. You can only give accurate advice for a specific phone brand, taking into account the firmware version.

The main problem with sensor calibration is the large selection of smartphone models and Android OS versions, because the settings menu has a different interface, or downloaded applications are not suitable.

Cleaning oxides and positioning the sensor

The touchscreen looks like a thin film to which a cable is connected. It is located between the protective glass and the display itself. This design is classic and is used in most Android smartphones.

You can find information online on how to carefully remove the protective glass. To do this, heat the glue with a stream of hot air, turn off the sensor, clean it and the contacts, and then correctly install it back into its working position. This repair method is effective when the sensor on the phone partially does not work or spontaneous clicks occur.

This repair is not suitable when the display has a block design, that is, the screen, sensor and protective glass are a single unit.

Display modules are better protected from mechanical damage, dust and moisture, but if they break, they can only be replaced with a new one.

This design does not provide for the possibility of repair.

The sensor stopped working for no apparent reason

It happens that users of Android devices wonder what to do if the sensor lags or the touchscreen does not respond for no obvious reason. Owners of such gadgets assure that they have not dropped or gotten their devices wet, but breakdowns do not appear out of the blue.

The cause of the malfunction may lie in a manufacturing defect, frequent exposure to a dusty or humid room, or minor impacts that gradually led to the displacement of parts. After analyzing these factors, you can roughly determine the type of breakdown and decide whether to restore the phone yourself or contact a repair shop.

How to protect your smartphone

In conclusion, we note that with each new generation of mobile phones, sensor protection improves. To avoid paying for repairs, it is better to think about additional means of protection.