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 the touch buttons is not so rare, and in terms of reliability they do not surpass ordinary buttons in any way. 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, dirt particles stick to the glass and then reduce the sensitivity of the sensor until it fails completely.
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.
Incorrectly applied film
Stickering a protective film is not an easy task. 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, because the sensitivity of the sensor deteriorates due to a poorly pasted film and the buttons do not work.
Temperature imbalance
Failures of touch buttons due to unsuitable temperatures are most common in winter, when the thermometer drops below 10-15 degrees below zero. The phone's LCD screen is sensitive to low temperatures and may stop functioning properly if it gets too cold.
If the exposure to low temperature was short-lived, after warming up the phone will quickly return to normal performance.
Touchscreen is displaced or peeling off
If the phone is operated in a hard mode, and its owner constantly exposes delicate equipment 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 heat the touch panel with hot air to soften the special adhesive that attaches it to the screen. Better not try to do it yourself, so as not to worsen the situation even more. Contact the specialists from the service center who have the experience and the necessary equipment for such manipulations.
Software failure
If the touchpad shines clean, and even the most careful examination does not show any damage, but the touch buttons still do not work, the smartphone software may have failed. Restart your operating system by turning your phone off and then on again.
Usually this simple action eliminates random errors. If this does not happen, remember - you may have installed a new application before the failure of the touch buttons or updated one of the already installed applications. Sensor failure can be triggered by a software conflict between old and freshly installed utilities. Delete the new application and restart your smartphone - it is possible that the touch buttons will restore functionality.
viral infection
The ubiquity of smartphones has drawn the attention of virus hackers to this segment of software. Today, an antivirus on a smartphone is the same mandatory element 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 malware. Download a good antivirus and scan your phone, then ruthlessly delete all suspicious files.
Reset
If none of the above measures worked, you are left to try the last resort of those available to the average user. Reset your phone to factory settings. 
If the failure of the touch buttons was caused by any software 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 resumes in the vast majority of cases.
Custom firmware
If you have installed the so-called custom firmware on your phone, you should be aware that from now on the manufacturer is not responsible for its performance.
Often the result of such actions are failures of any functions. What is most offensive, you don’t even have anyone to complain to. The only way out is to return to the factory firmware, which can be downloaded from the website of your phone manufacturer.
Troubleshooting at home
A common reason for the failure of all buttons is a long stay of the smartphone in a wet place or a strong blow. In the first case, the contacts could be oxidized and the problem can be solved by cleaning them. In the second case, device diagnostics will be required, which we recommend entrusting to the engineers of the HTC smartphone repair center. What to do if you want to fix the problem yourself, and the reasons for its occurrence, read below.
Troubleshooting
- Determining the state of the buttons. In order to understand how serious the problem you are facing, you need to determine whether the bottom buttons respond to touch. To do this, you must enable a feature 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.
Now your smartphone should vibrate every time you press the bottom buttons. If this happens, proceed to the next step. If not, try steps 3, 4 or 5 of this guide.
- Screen calibration. To do this, go to the menu "Settings" - "Language and keyboard" - "HTC Sense Input".
Select "Advanced Settings" - "Calibration Tool". After that, a sentence will appear on the screen, which must be typed on the keyboard. Follow the green circle.
If you fail to calibrate the keyboard, or you do it incorrectly, then go to "HTC Sense Input" - "Advanced Settings" - "Reset Calibration". This will reset the screen calibration to factory settings. Then you can calibrate again.
- Software Update. Perhaps the problem with non-working buttons lies in the outdated software of your smartphone. Update the software, this method often helps.
- Software reset to factory settings. After saving all the data from the internal memory of the smartphone to removable media, reset the device to factory settings. We recommend resetting only for those users who could not fix the problem in 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). First, save all personal data from your phone to removable media. Now press and hold the volume down button. Without releasing it, press and hold the power button. Release both buttons when the splash screen appears. The menu that appears is controlled by the volume up and down buttons. By pressing the volume down button, select the item "Restore original settings" (eng. "Factory Reset"). To confirm your choice of action, press the Power key.
If these methods did not help you, make sure that you followed all the steps correctly and consistently, try to do each step again. Also remember that often the bottom buttons of HTC smartphones are malfunctioning due to a faulty display module or hardware problems of the device.
The "menu" button in the Samsung android phone and many others can be touch, physical, and of course, as almost everything sometimes does not work.
If physical, then it is often solved by cleaning contacts. There are videos on youtube on how to do it yourself.
If your menu button is part of the sensor and does not work, then this is worse than it would be physical. Such repairs are more expensive.
However, you can try to calibrate the screen of your smartphone - suddenly it will help and do without repair by specialists.
What to do if the menu button does not work in an android smartphone
From the first words, I’ll immediately say that it’s not easy to fix the problem with a non-working menu button on your own.
However, without it, like some other "home" and "back", "you can live" if they are programmatically emulated.
To do this, you need to get root rights and install the program "Floating Soft Keys". Then you can adjust the buttons to return your device to proper performance.
Sometimes you may need a new touchscreen, although it can be difficult to find one for certain models.
Sometimes the problem can be solved without opening the case - by duplicating the function keys, but this will not work on all android devices.
To activate such a function, you need to write the line “qemu.hw.mainkeys=0” in /system/build.prop at the very end, but superuser rights are required.
As a result, additional functionality should appear above the faulty button. The application "Soft Buttons" can simplify this procedure.
There is a program that does not require root rights, which allows you to duplicate the phone's buttons. One of these "Back Button" is free with many settings.
After installation, translucent icons appear on the display with function keys: menu, back, home and screen rotation. They can be dragged to a convenient place, only the screen is reduced by the height of the icons.
Causes of not working menu buttons in android
The cause may be a software or hardware failure. Fortunately, 90% of the problems are in a software failure, which is solved on its own.
To do this, go to "settings" and click on the "backup and reset" section. There we select a complete reset with the removal of all data.
Naturally, before that, we separately save everything that is needed (you can on a computer, and then transfer it back to your phone).
You can also use the Turbo Cleaner program. The application is able to control the functions of the phone.
The last option is “flashing”, which requires skills and contacting a service center.
If the description above did not bring a positive result, then you don’t want to, but you probably can’t do without a service center. Good luck.
Samsung Galaxy phones, especially the Samsung Galaxy S3, S4, and S5, are notorious for having problematic screens. Many users either have a blank screen, black screen even though the phone is fully charged, responsive or unidentified dots on screen screen. If you've just bought one of these models and are thinking, don't worry. In this article, we will let you know 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 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 phones are exported long distances around the world. This may affect the operation of the touch screen.
Samsung phones are pretty thin. The touchscreen controllers they use are scaled down in favor of phone size. This can affect their performance and durability.
There could be several reasons that caused the Samsung Galaxy screen problem. Depending on the problem, you may be able to narrow down the causes of the failed touch screen.
I. Blank screen
This is a very common issue for all smartphones, not just Samsung Galaxy phones. This is usually caused by:
An app or feature on your Samsung is frozen, frozen;
There is not enough battery to power the device;
Actual physical damage to the touch screen.
II. Screen not responding to touch
Screen numbness is usually caused by a system failure, be it software or hardware. A software problem will be easier to fix. Here are some of the causes of an unresponsive screen:
Problematic third-party application;
Your Samsung Galaxy phone is frozen, frozen;
There is a bug in one of the hardware inside the device.
III. dead pixel
These unknown spots are caused by dead pixels that were caused by:
The third party app keeps crashing;
Physical damage to the screen in a specific area;
The GPU has issues with a third party application.
The manufacturer's defect, in this case, contact the warranty and they will change the phone for you.
The problem with Samsung sensor not working 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 turned off. 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 Phone in Safe Mode
This is another helpful step to get rid of touchscreen issues if it is some third party application that is causing the problem. Safe Mode disables all third-party apps temporarily, and if you are not experiencing the issue while in Safe Mode, it must be a third-party app that is causing this problem.
To boot your phone in safe mode, follow these steps:
1. Completely turn off the device
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. Keep holding this button until the phone restarts.
5. It will show safe mode on the bottom left corner of the phone.
Once you're sure it's the third party apps that are causing this issue, uninstall them by going to settings > App > App Manager > swipe on the downloaded options > select the desired app > Uninstall and finally tap OK. If you have a lot of apps, it can take a long time to uninstall them one by one, so you can perform a factory data 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 the Volume Down button, and then press the Power button
3. Keep holding the buttons and when the Samsung logo appears, release the power button but keep the home button and the volume down button
4. When you see the Android logo, release the other two buttons
5. The message "Installing system update" will appear, followed by the recovery screen
6. To highlight "Wipe cache partition", use the volume down key and press the power button to select it.
7. When it's 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 touch screen malfunction can be stopped by preventing overload. The phone tends to freeze if it's overworked, unlike other phones that quickly heat up or drain the battery. It just hangs. Most users mistakenly accept the solution to the touch screen problem, when in fact, most of the internal parts of the phone are at a standstill. This can happen if you play games or make videos for a very long time. Wait a while before using your phone again.
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Faulty GPU. If you're 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 apps, and restart your phone.
Perform a Hard Reset
If you find that all the steps above fail to fix the problem - Samsung sensor not working, try performing a hard reset. It will remove all files and apps from your Galaxy and reset 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 keep holding 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 resets that will wipe everything from the device and then reboot the system.
Sensor Not Working on Samsung – Hardware Issues
The Samsung Galaxy is relatively new in the market, but there are still many complaints regarding the Galaxy Touch Screen as many people are facing such issues. It's certainly very annoying if your touch gives you a slow response time or doesn't work at all.
The following are some of the Samsung Galaxy touch screen issues that its users are facing:
Problems:
- Click "Stop Application"
- Slow response
- The sensor does not work on some sections of the screen.
Causes of problems:
- Phone cache is almost full.
- Any physical damage has occurred on your display screen that has partially or completely broken the function of the phone's touch screen.
- A low charge sometimes also causes a slow touch response.
Temporary solution:
1. Reset your phone.
2. Remove and reinsert the battery (after switching off). 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:
- Touch screen problem
- Problem with Button Touch
Touch screen problem
1. Disconnect the connectors and check the display connectors.
2. Now clean the onboard connector and the display connector. After cleaning.
3. Re-solder each pin of the built-in connector
4. Using the Multi Meter, check each component of the connector. Reheat faulty connectors. If they still don't work, replace them. Check Again
5. If it still doesn't work, check any other good LCD as sometimes the problem is with the whole LCD screen not just when you touch your phone.
Problem with Button Touch
- Connector for connecting a functional button and a connector for charging. Now check.
- If it still doesn't work, check the charging connector if that's problematic. Change it as there is nothing you can do in this case.
The above steps will surely help you fix the touch screen problem from your Samsung Galaxy in the most efficient way. If your touch screen is giving you problems, then your phone has become a complete crippler as 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 you have a white or all black display, start by performing a soft reset on your device. If your screen still won't work after a reset...
2. Retry the repair 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. Blockage on your display, this is a sign of too much pressure on the screen caused by shipping 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 features, then you may have a defective or broken part.
Samsung Galaxy screen not working is a preventable problem. Here are some helpful tips to protect your Samsung:
To properly protect your Samsung Galaxy display panel, use a really good protective case. This will prevent the screen from being damaged, cracked or scratched after being dropped.
Sometimes your phone has manufacturing faults. So to keep your phone and you protected, make sure you keep your warranty until it expires. This ensures that you get the support you need from Samsung if the problem is not caused by your negligence.
Install reliable antivirus software to protect your system from malicious attacks.
Before downloading any apps, make sure you read the reviews. 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 in a small amount of time.
Do not overcharge your battery at the same time - this will increase the chance of your phone overheating, which can damage your phone's components.
While there can be multiple causes for Samsung Galaxy screen problem, there are an equal number of ways to counteract them. Therefore, there is no need to panic - this article is a great example for solving your problems.
If you do not solve the problem - Samsung sensor does not work, please let us know in the comments, we will help.
If we talk about the possible reasons why the touch buttons on the android phone stopped working, the failure is more often from the physical side than from the software side. If there are reasons from the first list, you will most likely have to carry the device to a service center.
Physical reasons:
- A strong blow to a tablet or smartphone, a fall from a height.
- Prolonged exposure to moisture. Particularly serious damage occurs due to water entering the area between the screen and the film or under the case. Contacts are oxidized. After exposure to moisture, you need to act immediately.
- Sharp temperature changes. Return the device to a room at room temperature. Sensor performance may improve.
- Screen punching. There are no scratches or cracks. The breakage is noticeable when pressed - then you can see the glare in the damaged parts of the sensor.
- Replacing the screen with an unsuitable model.
- Serious pollution. Wipe off dirt, dust, moisture, fingerprints with special wet wipes from an electronics store or a microfiber cloth.
- Bad film. In places where air accumulates under the film, parts of the screen will stop working. Remove the film, if possible, replace with a new one.
Software reasons:
- The OS is overloaded with applications or some of them do not work properly.
- Change device settings.
- Touchscreen problems are possible if the screen does not recognize touch correctly or poorly. Screen calibration will help here (really done at home).
- Inappropriate or unstable firmware version.
Why doesn't the sensor part work on android? Most likely, the contact has departed or oxidized.
On a phone with a removable battery, remove the cover and remove the battery. Insert it back 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 it doesn't help, try again, but keep these three keys pressed for longer. If your smartphone is from other manufacturers and has a built-in battery, the above methods may help. Otherwise, you will have to wait for the battery to completely discharge or carry the device to a service center, where at the same time they will deal with problems with the screen. It also happens that a reboot is needed only for the display to respond 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 version of Android 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 are the touch buttons not working on an android phone? Sometimes the film is the problem. If everything was fine before it, try to remove it. Sometimes it's even a new protective glass, which can also be detached on its own. Users say that the bottom touch buttons, which stopped working after calibrating the screen (3rd step of the next instruction), became sensitive again.
Common repair options
These steps will help in many cases of malfunctioning Android phone or tablet due to software, so you can apply these tips when in doubt about the correct operation of the system.
- Reboot your device. It may have been under heavy program load or a minor bug has occurred. Maybe the application just hung, but the sensor works?
- Update firmware. To do this, go to the following items: "Settings" - "About device" - "System updates" - "Check now". Most often, the problem is solved.
- Reset the settings to factory settings. Save all important data to a memory card, computer or similar media. Click "Settings" - "Memory" - "Reset to factory settings" - "Reset settings" - "Erase everything". Confirm your choice if necessary. Wait a few minutes and the reboot will automatically
- What to do if the screen is buggy? If it works, but slowly, just clean the phone as a whole. 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 clean up RAM.
How to fix the device
It is unlikely that you can fix the phone yourself. You will succeed when the cause of the fault is in the software. In this case, read the methods below.
- Calibrate the screen. Depending on the manufacturer, a utility for this may be built in, or you will have to download the application yourself. There are several ways. For HTC models: "Settings" - "Language and Keyboard" - "HTC Sense Input". On other smartphones: "Settings" - "Display" - "Screen" - "Screen calibration". 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 will be able to improve the display's response. For example, Touchscreen Calibration or SGS Touchscreen Booster (you can set parameters manually in it).
- The bottom touch buttons do not work on an android phone, what should I 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 repair the device.
