Why the smartphone screen does not respond to touch and what to do. Phone problems: the touchscreen sensor does not respond to the touch of the fingers Galaxy a3 sensor does not work

e running Android. The touchscreen (sensor) works by itself, works some time after pressing, dulls, lags, does not work correctly. What to do and how to fix it?

Many users face a problem when phone or Android tablet starts to play up. It seems that he did not fall anywhere and did not "watered" with anything, but it does not work as it should.

For example, the device has problems with a touchscreen, that is, the touch input ("sensor") does not work correctly... This may be due to:

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

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

However, do not rush to get upset - in 90% of cases with 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" where you choose full reset settings with deletion of all data. Be careful, the use of this method is often effective, but it entails the removal of 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 the problem persists after it, see Method 2.

Method 2.

Based on solving touchscreen problems phone s and tablets based on Android by introducing additional software. Utilities that control all processes inside gadgets. Today, there are quite a few of them, however, the fewer functions an application contains, the more, as a rule, it is effective. Best of all controls the functions of the system, corrects, and fixes all possible errors of settings and synchronization is a small, easy-to-use, free utility for devices based on Android. 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, from you, in principle, nothing else is required. The application will completely take over the control of the device's functions. (By the way, among other things, the gadget will start charging 20% faster, and its performance will also significantly increase, which will affect the loading and operation speed of all applications, games, and the system as a whole. On average, after scanning, the system works on 50% faster.)

In addition, it is worth cleaning the system with NORMAL antivirus. Best of all, it copes with this task Kaspersky antivirus , which you can download. Unlike the "multi-cleaner", the software of "Kaspersky Lab" is paid, therefore, if you do not have the opportunity to install such protection, you can skip this step ...

Method 3.

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

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

The touchscreen (sensor) does not work well in a phone or tablet running Android. The touchscreen (sensor) works by itself, works some time after pressing, dulls, lags, does not work correctly. What to do and how to fix it?

Touch control has become an indisputable 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 on Android does not work, the smartphone turns into an almost useless device, losing 90% of the available functions. In this article, you will learn how to protect your phone's touchscreen, what malfunctions are, how you can fix the sensor yourself, and when you need to contact a service center.

Reasons for sensor breakage

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

Wrong reaction to touch

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

Screen is dirty. Grease or dirt from your fingers gets onto the display and the sensor can no longer accept commands. Usually such spots occupy a certain area, in which the control does not work. In this case, wipe the display with a damp cloth and do not touch the phone with dirty hands.
Incorrectly glued protective film or glass. These are two popular and necessary accessories for a smartphone, since their replacement is many times easier than replacing the display in case of mechanical damage to the phone. But if they are not glued correctly, the display does not respond to touch in certain places due to accumulated air or dirt under the protective shell. The film or glass must be removed, the screen must be cleaned and the new protection must be applied correctly.
Mechanical damage to the display, in which part of the sensor does not work. This is usually accompanied by a noticeable cobweb 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 smartphones can cost a third, and sometimes even 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'll show 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 implies work with constant failures. For example, you do not touch the screen, but the smartphone receives commands, you can even see the visualization of touches. In this case, with your phone, the following:

Software glitch. Errors in the Android OS are not uncommon, because software is written by some, components are manufactured by others, and smartphones are assembled by others. Crashes often occur after installing new programs or when updating the OS. Therefore, when this malfunction occurs, the first action is to reboot the phone. If it does not help, it is worth removing recently installed applications and rolling back the OS to the previous version. The last resort is a factory reset, which deletes all personal information, but removes any software glitches.
Dust or moisture has got inside. The sensor itself "clicks" on the screen if dust clogs or oxides have formed on its contacts or on the control board due to moisture trapped inside the device. We will consider this error in more detail in the next paragraph.

The touchscreen does not respond

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

The control board is damaged. It could break due to the impact of 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. Moreover, the effect of such falls can be cumulative. It happens that the loop just moved away from the contact, and to restore the screen's operation, it is enough to put it back in place.
The loop is completely or partially broken. The reason is mechanical damage. But if the sensor turns on every other time, then some contacts are damaged, and the cable must be replaced. With the availability of tools, spare parts and due care, this can be done by yourself, but contacting a service center is recommended.

How can you fix a broken cell phone sensor?

Not always, if you have problems with the touchscreen, you should immediately go to the service center. In the previous section, we gave solutions to the simplest malfunctions, and now we will consider several more serious malfunctions.

How to calibrate the touchscreen

If the sensor is pressed in a different place, its operation must be configured using calibration. It can be done in two ways.

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

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

Oxidation cleaning and sensor positioning

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

On the net you can find information 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 put it back in the working position correctly. This repair method is effective when the sensor on the phone partially does not work or there are spontaneous clicks.

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

Display modules are better protected from mechanical damage, dust and moisture, but in the event of a breakdown, 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 so happens that users of Android devices wonder what to do if the sensor lags, or the touchscreen does not respond for no apparent reason. The owners of such gadgets assure that they did not drop or wet their devices, but breakdowns do not appear out of the blue.

The cause of the malfunction may lie in a factory defect, frequent presence in a dusty or damp room, in minor shocks, which gradually led to the displacement of parts. After analyzing these factors, you can roughly determine the type of breakdown and decide 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 is improving. In order not to pay for repairs, it is better to think about additional means of protection.

Samsung A3's screen problems are not uncommon. Especially often, users observe a complete refusal of the touchscreen, which either does not react at all to touches, or it responds to commands every other time. Some problems may be related to software glitches. But it also happens that certain components of the hardware have become unusable. In this case, to resume the correct operation of the touchscreen, you will need to replace it.

Why is the sensor not working on Samsung A3

Many people face the problem when the sensor does not work on the Samsung A3. Let's figure out which factors or failures can lead to a malfunction of the device.

The most common problems are:

filling the cache memory of the smartphone;
freezing of the device associated with software failures;
mechanical damage to the screen;
low battery or swelling of the battery;
the departure of the touchscreen loop, which occurred due to the fall of the smartphone;
oxidation of contacts on the motherboard associated with the penetration of moisture into the interior of the device;
failure of the display controller chip;

Incorrect work can manifest itself in the failure of the sensor in specific places, a slow reaction to touch or a complete refusal to execute commands, or, conversely, spontaneous operation.

Testing the sensor

To test the operation of a component, you can use the built-in command * # 7353 # and select the "TSP Dot Mode" option. After that, you need to press in different parts of the screen and trace where the device fails. Such an activity can help identify the cause of the problem.

Samsung Galaxy A3 sensor does not work: fix the problem

If the sensor does not work on samsung galaxy a3, first try to eliminate the system crash. To do this, you need to reboot. If the event is unsuccessful, try to remove the battery after switching off and after 5 seconds insert it back.

Didn't help again? Clean your smartphone with a special antiseptic from dirt and dust. Sometimes the touchscreen does not work correctly due to plaque or air accumulated under the glass. Also try re-gluing the protector following the manufacturer's recommendations.

Display scratches

If the sensor does not work in some places, try to look at the display and remember if you recently dropped your smartphone. The detection of cracks with a 95% probability indicates that you need to carry out a complete replacement of the part.

Changing the part on the Samsung Galaxy a3

Failed to configure the sensor using the above methods? Then you should replace the part. In the online store GadgetParts you can purchase the necessary part to restore your device to work.

It should be noted that for replacement, you will need to buy a whole module consisting of a screen, a touchscreen and a frame. It is also recommended to get a protective glass to minimize the risk of mechanical damage to the screen.

You can install the purchased part yourself. If you are unsure of your abilities, contact the service center.

Suitable products

Articles and Life Hacks

Quite often, after installing the necessary or the question arises of how to revive the smartphone.

It often happens that it does not react at all to pressing the power key and touching the screen of the device.

Sequencing

If the gadget does not respond to sensory input and the charger, do not immediately panic. It is recommended to perform some of the following manipulations:

Often, the microcontroller responsible for the process of transferring the electrical charge remains intact.
You can try leaving your smartphone on charge for a few hours. In some situations, this helps to move the device out of the so-called "brick" position.
Next, you should use a combination of keys to turn on and decrease or increase the volume. The buttons are clamped, as a result of which the screen should light up in the Recovery menu mode.
By operating these buttons, you can freely navigate the menu that opens. It is easy to select the desired item with the power key. The first thing to look for is the Wipe Cache category.
With the Power on button, you can easily clear all your personal app cache.

After completing the proposed manipulations, you must proceed to the next steps. The user is advised to:

Go back to the menu and select Reboot or Reboot normal mode.
If it was able to turn on on its own after the indicated actions, then you should enter the menu and remove the last of the installed programs or the last downloaded application.
If the device has not been revived, you should repeat all the previous manipulations until you select the Wipe Cache category. You need to click on Wipe All Data.
Thanks to this action, the user will be able to delete all information that is on the mobile device. However, it is important to remember that absolutely everything will be lost, including contacts, photos, videos, SMS messages.
Then you will need to select the Reboot category.

As a rule, after the performed manipulations, the smartphone can be turned on for sure. The probability of successful completion of the job is 99.9%.

Although the samsung galaxy a50 phones have appeared quite recently (with the release of android 9), there have already been isolated cases that the sensor has stopped working or if it works, then it is bad.

Let's hope that if your sensor does not work, then the reason is not in the hardware, which can result from a shock when dropped, water ingress, exceeding the permissible temperatures, damage to the screen controller, or a factory defect.

In such cases, you may need to replace the sensor on your samsung galaxy a 50, sensor controller, flex cable, connector, or cleaning from traces of corrosion.

Yes, sometimes these hardware components can stop working for some reason, but somehow I will share with you troubleshooting procedures that have proven to be effective in fixing problems when the sensor is not working.

What to do if the sensor does not work on the Samsung a50 or does not respond well

The first is a forced restart. This is important because it will refresh your phone's memory. It is always possible that the problem is caused by a system crash or that some services have stopped working causing the touchscreen to become unresponsive.

To do this, press and hold the Volume Up and Power keys at the same time for 10 seconds or longer.

Your phone will start up fine, but if the problem is really minor, then that should be enough and the touchscreen may work again.

The second is the security mode. You must enable Safe Mode if the problem persists after a forced restart - how to do it

This will temporarily disable all third-party applications and will immediately inform you if the problem is caused by a third-party application or not.

If the touchscreen works fine in this mode, it means that a third-party application or service is calling it.

In this case, you need to move on to the next solution to fix the problem, but if the problem persists in this mode, skip uninstalling some applications and proceed with deleting the system cache.

Uninstall third party apps. The uninstallation of third-party apps is triggered by the next step, which must be followed if your touchscreen is in safe mode.

It can be tricky, especially if you don't know which application is causing the problem, but once you point it out, it will definitely fix the problem.

The third is to clear the cache partition. To do this, you can boot the phone in recovery mode, but there is an easier way -

Caches are temporary files created by the system itself to keep your phone running smoothly and flawlessly, but they are prone to damage and when this happens, this is just one of the problems you may encounter.

The fourth is a factory reset. After following the previous procedures, the touchscreen is still unresponsive, you have no choice but to reset your phone to rule out the possibility that this is only a temporary software issue.

Please back up your important files and data before resetting as they will be deleted, so back up your data. Who does not know how the reset is done

Fifth, take the phone to a service center. If all else fails, there may be a hardware problem, specifically the digitizer that is part of the display module.

It may already be damaged, or it may be a minor flex cable issue. However, this is a hardware issue and you need the help of an authorized technician to open your phone without losing your warranty.

I hope I was able to help you fix this with your device. Thanks a lot for reading! Good luck.