The touch screen of a smartphone provides the user with much more control over the phone than a conventional phone with physical buttons.
But, unfortunately, the failure of touch buttons is not so rare, and they do not surpass regular buttons in terms of reliability. Find out what to do if the touch buttons on your smartphone do not work and why this happens.
The simplest reason is dirt
The sensitivity of the sensor in a smartphone directly depends on its purity. If you touch the screen with dirty hands, particles of dirt adhere to the glass and then reduce the sensitivity of the sensor to the point of complete failure.
To return the touch buttons to their normal state, it is enough to wipe the screen with a damp cloth designed specifically for cleaning monitors. To prevent frequent contamination of the screen, you can use a protective film, which will not only prevent unwanted substances from sticking to it, but also protect it from scratches and small cracks.
Inaccurately glued film
Applying a protective film is a tricky business. There should be no air bubbles under it, otherwise some touch buttons will not be able to fully function.
Many phone owners undertake to stick the film on their own, but later they are forced to contact service specialists about this, since due to poorly glued film, the sensitivity of the sensor deteriorates and the buttons do not work.
Temperature imbalance
Failures of touch buttons due to inappropriate temperatures are most common in winter, when the thermometer drops below 10-15 degrees below zero. The LCD screen of your phone is sensitive to low temperatures and may not function properly if it gets cold.
If the exposure to low temperatures was short-lived, after warming up the phone will quickly return to normal operating conditions.
The touchscreen has shifted or is peeling
If the phone is operated in hard mode, and its owner constantly exposes gentle techniques to various negative influences, the touch panel or touchscreen may peel off the screen in some places. If this happens at the bottom of the smartphone screen, the function touch buttons may stop working. 
To get rid of this problem, you should warm up the touch panel with hot air to soften the special glue that attaches it to the screen. Better not to try to do it yourself, so as not to worsen the situation even more. Contact the specialists from the service center who have experience and the necessary equipment for such manipulations.
Software glitch
If the touchpad shines clean, and even the most careful inspection does not show any damage, but the touch buttons still do not work, the smartphone software may have crashed. Restart your operating system by turning off your phone and then turning it back on.
This is usually a simple step to fix random errors. If this did not happen, remember - you may have installed a new application or updated some of the already installed applications before the touch buttons failed. Sensor failure can be triggered by a software conflict between old and newly installed utilities. Delete the new application and restart your smartphone - it is possible that the touch buttons will restore functionality.
Viral contamination
The ubiquity of smartphones has forced the attention of virus-writing hackers to this segment of software. Today, antivirus software on a smartphone is just as essential a piece of software as on a regular computer.
If you do not have antivirus protection, it is possible that the failure of the touch buttons is caused by the actions of a malicious program. Download a good antivirus and scan your phone, then ruthlessly delete any files that seem suspicious.
Reset
If none of the above measures worked, you are left to try the last remedy available to the average user. Factory reset your phone. 
If the failure of the touch buttons was caused by any programmatic reasons, as a result of the reset, all errors will be reset along with your personal settings, application updates, and the applications themselves installed during the use of the phone. After a reset, the functioning of all elements of the phone is resumed in the vast majority of cases.
Custom firmware
If you have installed the so-called custom firmware on your phone, then you should be aware that from now on the manufacturer is not responsible for its performance.
Often, the consequence of such actions is the failure of any functions. The most offensive thing is that you don't even have anyone to make a claim. The only way out is to return to the factory firmware, which can be downloaded from the website of your phone manufacturer.
Samsung Galaxy phones, especially Samsung Galaxy S3, S4 and S5, are known for their problematic screens. Many users either have a blank screen, a black screen, despite the fact that the phone is fully charged, return or unidentified dots have stopped on the screen. If you've just bought one of these models and are thinking, don't worry. In this article, we will tell you the reasons for these crashes, how you can get your data back, and how to fix the screens. The most common problem is Samsung's sensor is not working. Let's see how to fix this.
The touch screen of the phone is completely unresponsive to touch. What to do?
Samsung does not manufacture a defective product. But telephones are exported long distances all over the world. This may affect the operation of the touch screen.
Samsung phones are pretty thin. The touchscreen controllers they use downsize in favor of phone size. This can affect their performance and durability.
There could be multiple reasons causing the Samsung Galaxy screen problem. Depending on the problem, you can narrow down the causes of the faulty touchscreen.
I. Blank screen
This is a very common problem for all smartphones, not just Samsung Galaxy phones. This is usually caused by the following:
An app or function in your Samsung is frozen, frozen;
There is not enough battery to power the device;
Actual physical damage to the touchscreen.
II. Screen not responding to touch
Screen insensitivity is usually caused by a system glitch, be it software or hardware. The software problem will be easier to fix. Some of the reasons for an unresponsive screen are:
Problematic third-party application;
Your Samsung Galaxy phone is frozen, frozen;
There is an error in one of the hardware inside the device.
III. Dead pixel
These unknown spots are caused by dead pixels, which were caused by:
Third party application keeps crashing;
Physical damage to the screen in a specific area;
GPU has issues with third party application.
Defect of the manufacturer, in this case, contact the warranty and you will change your phone.
Samsung sensor not working problem or freezing problem can be solved by turning off the phone and turning it back on. Press and hold the power button and volume down button for 7 seconds. The phone will be disconnected. The issue will most likely be resolved after downloading it. If the phone does not respond, remove the cover and remove the battery, then reinsert and turn on the phone.
Remove SIM Card
Shut down your Galaxy and take out the Sim card. Now re-insert the Sim after a few seconds, turn on the phone and see if anything has changed?
Boot Your Phone in Safe Mode
This is another helpful step to get rid of touchscreen issues if it is some third party application causing the problem. Safe Mode temporarily disables all third-party apps, and if you are not experiencing an issue in this mode, it must be the third-party app causing this problem.
To boot your phone in safe mode, follow these steps:
1. Turn off the device completely
2.Now press the power button for a few seconds until the Samsung Galaxy logo appears
3. Then release the power key and press the volume down button. The phone will restart.
4. Continue to hold this button until the phone restarts.
5. It will show safe mode in the lower left corner of the phone.
Once you are convinced that these are the third-party apps that are causing this problem, uninstall them by going to Settings> Application> Application Manager> swipe through the downloaded options> select the app you want> Uninstall and finally press OK. If you have many applications, uninstalling them one at a time can take a long time, so you can perform a factory reset (explained below).
Clear Phone Cache
Another solution to the problem is to delete the cache. Here's how to do it.
1. Turn off your smartphone completely
2. Press and hold the Home button and Volume Down button, and then press the Power button
3. Continue to hold the buttons and when the Samsung logo appears, release the power button but hold the Home button and Volume Down button
4. When you see the Android logo, release the other two buttons
5. The message "Installing system update" appears, and then the recovery screen appears
6. To highlight the "Wipe cache partition" use the volume down key and press the power button to select it.
7. When done, use the Volume Down key again to highlight the Reboot System Now option and select it with the Power button.
Let Your Phone Relax
Samsung Galaxy touchscreen malfunction can be stopped by preventing overload. The phone tends to freeze if it is overloaded with work, unlike other phones, which quickly heat up or drain the battery. It just freezes. Most users mistakenly accept the solution to the touchscreen problem, while in reality most of the internal parts of the phone are deadlocked. This can happen if you have been playing games or filming videos for a very long time. Wait for a while before using the phone again.
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Defective GPU. If you are using your Galaxy for gaming, your graphics processing unit (GPU) may be stretched to its limits. To clear those dead pixels, you need to clear the RAM cache, close all running applications and restart your phone.
Perform Hard Reset
If you find that all the above steps do not fix the problem - Samsung sensor is not working, try performing a hard reset. It will remove all files and apps from your Galaxy and restore your phone to factory settings. Below are the steps to perform a hard reset:
1. Press the volume up, power and home buttons and hold until you see the Galaxy screen.
2. Now leave the power button, but continue to hold the other two buttons.
3. Release the two buttons when you see the Android recovery screen.
4. Use the volume up and down buttons to highlight options and the power button to select.
5. Select factory reset, which will erase everything from the device and then reboot the system.
Sensor Not Working on Samsung - Hardware Issues
The Samsung Galaxy is relatively new to the market, but there are still many complaints about the Galaxy Touch Screen as many people face such problems. It is definitely very annoying if your touch is giving you slow response times or not working at all.
Below are some of the Samsung Galaxy touchscreen issues that its users are experiencing:
Problems:
- Click "Stop Application"
- Slow response
- The sensor does not work on some sections of the screen.
Causes of problems:
- The phone cache is almost full.
- Some physical damage has occurred on your display screen that partially or completely disrupts the function of the touchscreen of your phone.
- Low charge sometimes also causes a slow sensory response.
Temporary solution:
1. Reset your phone.
2. Remove and reinsert the battery (after shutdown). Be sure to allow a delay of at least 5 seconds before inserting the battery.
The hardware solution for Samsung Galaxy is divided into two sections:
- Touchscreen problem
- Button Touch problem
Touchscreen problem
1. Disconnect the connectors and check the display connectors.
2. Now clean the side connector and the display connector. After cleaning.
3. Re-solder each pin of the onboard connector
4. Using the Multi Meter, test each connector component. Overheat defective connectors. If they still don't work, replace them. Check again
5. If it still doesn't work, check any other good LCD screen as sometimes the problem is with the entire LCD screen other than touching your phone.
Button Touch problem
- Function button connector and charging connector. Now check it out.
- If it still doesn't work, check the charging connector if it's problematic. Change it as there is nothing you can do in this case.
The above steps will surely help you solve the touch screen problem from your Samsung Galaxy in the most efficient way. If your touchscreen is giving you problems, then your phone has become a complete krippler since you won't be able to do anything on your phone (don't even unlock your phone in any way).
I replaced the display on the phone and now the Samsung sensor does not work!
1. If your display is white or all black, start by performing a soft reset on your device. If your screen still doesn't work after a reset ...
2. Try the repair again from the beginning. In the step where you connect the shield to your main board, check the original shield to make sure it still works.
3. A lock on your display is a sign of too much pressure on the screen caused by transportation or during installation. Open the device again and make sure none of your internal components are causing pressure.
4. If you see lines down your display or only partially working touch functions, then you may have a faulty or broken part.
Samsung Galaxy screen not working is a preventable problem. Here are some helpful tips to keep your Samsung safe:
Use a really good protective case to properly protect your Samsung Galaxy display panel. This will prevent screen damage, cracks or scratches after being dropped.
Sometimes your phone has a manufacturing problem. Therefore, to keep your phone and you protected, make sure you keep your warranty until it expires. This will ensure that you get the support you need from Samsung, as long as the problem isn't caused by your negligence.
Install reliable antivirus software to protect your system from malicious attacks.
Make sure you read the reviews before downloading any apps. This is a great way to find out if an app is viral and will cause problems for your Samsung Galaxy. The best way to do this is to filter reviews according to reviewers who use the same device.
Try not to play games with too large graphics, as this will expand the capabilities of your device. Either play one game at a time, or play for a short amount of time.
Do not overcharge the battery at the same time - this will increase the chances of your phone overheating, which could damage your phone's components.
While the Samsung Galaxy screen problem can be caused by multiple reasons, there are an equal number of ways to counter them. So no need to panic - this article is a great example for solving your problems.
If you have not solved the problem - Samsung sensor is not working, please let us know in the comments, we will help.
If we talk about possible reasons why the touch buttons on the android phone stopped working, the failure is more often from the physical than the software side. If there are reasons from the first list, most likely you will have to carry the device to a service center.
Physical reasons:
- Strong blow to the tablet or smartphone, falling from a height.
- Prolonged exposure to moisture. Especially serious damage occurs when water gets into the area between the screen and the film or under the case. Contacts are oxidized. After exposure to moisture, action must be taken immediately.
- Sudden temperature changes. Return the device to room temperature. Sensor performance may improve.
- Screen punching. No scratches or cracks. The breakage is noticeable when pressed - then glare is visible in the damaged parts of the sensor.
- Replacing the screen with an unsuitable model.
- Serious pollution. Wipe off dirt, dust, moisture, and fingerprints with special wet wipes from an electronics store or a microfiber cloth.
- Poorly glued film. In places where air accumulates under the film, parts of the screen will stop working. Remove the film, replace it with a new one if possible.
Software reasons:
- The OS is overloaded with applications or some of them are not working properly.
- Changes to device settings.
- Touchscreen malfunctions are possible if the screen is incorrect or poorly recognizes touches. Calibration of the screen will help here (really do it at home).
- Inappropriate or unstable firmware version.
Why is part of the sensor not working on android? Most likely, the contact has moved away or oxidized.
In a phone with a removable battery, remove the cover and remove the battery. Reinsert and turn on the device using the mechanical button.
If the sensor does not work partially, but not completely, and you can download the application, install Rebooter from the Play Market. On Xiaomi, Meizu or Digma, after long pressing the on / off button (20 seconds or longer), the phone will restart or turn off. For Samsung and Sony, press the Power / Lock, Volume Up and Volume Down buttons at the same time. Hold for 7-10 seconds. If that doesn't work, try again, but keep these three keys pressed for longer. If your smartphone is from other manufacturers and has a built-in battery, perhaps the above methods will help. Otherwise, you will have to wait until the battery is completely discharged or carry the device to the service center, where at the same time they will deal with the screen malfunctions. It also happens that a reboot is only needed for the display to react again. What to do if the sensor on Android does not work after locking the screen?
Most often the problem is in the firmware version. To solve it, update the Android version and, if it does not help, reset the settings. How to do this is in paragraphs 2 and 4 of the instructions of the next paragraph of the article. Why don't touch buttons on android phone work? Sometimes the film is the problem. If everything was good before it, try to remove it. Sometimes it's even a new protective glass, which you can also detach yourself. Users say that the bottom touch buttons, which stopped working after screen calibration (3rd step of the next instruction), have become touch sensitive again.
Common repair options
These actions will help in many cases of malfunctioning of a phone or tablet running Android OS due to software, so you can apply these tips when you doubt the system is working properly.
- Reboot your device. It may have been under heavy software load, or a minor error has occurred. Maybe the application just stuck, but the sensor is working?
- Update your firmware. To do this, go to the following items: "Settings" - "About device" - "System updates" - "Check now". More often than not, the problem is solved.
- Reset the settings to factory defaults. Save all important data to a memory card, computer, or similar media. Tap Settings - Memory - Factory Reset - Reset Settings - Erase All. Confirm your choice if necessary. Wait a few minutes and the reboot will be done automatically
- What to do if the screen is buggy? If it works but slowly, just clean your phone altogether. Delete unnecessary files and applications and cache ("Settings" - "Applications" - any application from the list - "Clear cache"). Use CCleaner, Cleaner Master, or another application to remove other junk and clear RAM.
How to fix a device
You can hardly fix your phone yourself. You will succeed when the cause of the malfunction is in the software. In this case, read the methods below.
- Calibrate the screen. Depending on the manufacturer, there may be a built-in utility for this, or you will have to download the application yourself. There are several ways. For HTC models: Settings - Language & Keyboard - HTC Sense Input. On other smartphones: "Settings" - "Display" - "Screen" - "Calibrate the screen". Optionally, you can calibrate the screen through the engineering menu. It is used by developers to test and modify system components. We do not recommend this method as it can cause problems and take longer than other methods. A third-party screen calibration app from the Play Market can improve display response. For example, Touchscreen Calibration or SGS Touchscreen Booster (you can set parameters manually in it).
- The bottom touch buttons on an android phone do not work, what to do? You can install an application to create soft buttons with the same functions, but in a different place. We recommend Back Button - it does not require root rights.
Contact the service center. They will more accurately determine the cause and fix the device.
Eliminating the problem at home
A common reason for the failure of all buttons is a long stay of the smartphone in a damp place or a strong impact. In the first case, the contacts could oxidize and the problem can be solved by cleaning them. In the second case, you will need to diagnose the device, which, we advise you to entrust to the engineers of the HTC smartphone repair center. What to do if you want to fix the problem yourself, and the reasons for it, read below.
How to fix the problem
- Determining the state of the buttons. In order to understand how serious the problem you are facing, it is necessary to determine whether the lower buttons respond to touch. To do this, you need to enable the function called "Vibration confirmation". To activate it, go to the "Settings" - "Sound" menu, and at the very bottom of the list that appears, check the box next to the "Vibration confirmation" function.
Your smartphone should now vibrate every time you press the bottom buttons. If this happens, go to the next step. If not, try steps 3, 4 or 5 of this instruction.
- Calibrate the screen. To do this, go to Settings - Language & Keyboard - HTC Sense Input.
Select "Advanced Settings" - "Calibration Tool". After that, a proposal will appear on the screen, which must be typed on the keyboard. Follow the green circle.
If you fail to calibrate the keyboard, or if you do it incorrectly, then go to "HTC Sense Input" - "Additional settings" - "Reset calibration". This will reset the screen calibration to the factory settings. Then you can perform the calibration again.
- Software Update. Perhaps the problem with the buttons not working is your smartphone's outdated software. Update the software, this method often helps.
- Soft reset to factory settings. Having previously saved all the data from the internal memory of the smartphone to removable media, reset the device to factory defaults. We recommend resetting only to those users who could not fix the problem with the two previous methods. To reset the settings go to the menu "Settings" - "Memory" - "Reset to factory settings".
Then a menu will appear in which we select "Reset phone settings" - "Erase everything".
- Hard reset to factory settings (this method will be useful for those users who do not have touch buttons and have similar problems with the touch screen). Save all personal data from your phone to removable media beforehand. Now press and hold the volume down button. Without releasing it, press and hold the power button. Release both buttons after the splash screen appears on the screen. The menu that appears is controlled by the volume down and up buttons. Pressing the volume down button select "Restore original settings" (English "Factory Reset"). Press the Power key to confirm your choice of action.
If the above methods did not help you - make sure that you followed all the steps correctly and sequentially, try to do each step again. Also remember that often the malfunction of the lower buttons of HTC smartphones manifests itself due to a faulty display module or hardware problems of the device.
