The main element of a tablet computer is the display. If the matrix fails, then the tablet turns into a “brick”. Therefore, it is so important to maintain the integrity of the sensor using all kinds of protection: glass, films, cases. But what to do if the tablet does not respond to touch? Let's take a look.
In 90 percent of cases this occurs due to the fault of the user, regardless of the brand and model of the device. List of reasons why equipment stops responding to touch and the image completely or partially disappears:
- External physical impact (fall, compression, blow);
- Operating system failure (viruses, update curves);
- Matrix calibration failure;
- Screen contamination (greasy, chemical, abrasive substances);
- Non-original elements in the design.
Of course, there are other failures, especially on cheap Chinese devices (Prestigio Grace 3101 / 3201 4g / 3157 / 3257, Digma Citi 1508 / 1544, Supra m72kg, Explay hit, Texet tm 8044, Dexp ursus s169 / ns210, Irbis tw 36, Dell Venue 8 3830 t02d, hp slate 7, Onda X20, Nomi C101044 Ultra4 LTE), on gadgets with outdated resistive liquid crystal displays (with styluses).
Let's take a closer look at each reason. We will look in detail at the means of restoring the functionality of the LCD display of portable devices.
What to do if the sensor on the tablet does not work
Unfortunately, many users are faced with the fact that the sensor on their tablet does not work.
Most of the dimensions of a tablet computer are occupied by the screen, since it is both a means of inputting information and a means of outputting images. Therefore, the sensor on the tablet is a key component, on the working condition of which the entire operation of the mobile device depends.
There can be many reasons why the sensor on a tablet does not work. According to statistics, owners of tablets are almost one and a half times more likely to encounter a similar problem than those who use smartphones.
This is due to the size of the device, because a large thing is easier to sit on, drop, fail to hold, and generally break it. Therefore, the article is intended to help those who are looking for what to do when the sensor stops working.
The most common causes of problems
If the touch screen does not work, first of all you need to understand why this happened. The reasons can be either hardware or system in nature. Also, the root of the problem may lie in improper operation.
List of the most common reasons:
- A small system glitch that can be resolved in a minute . It occurs extremely rarely on models of well-known brands, more often on low-quality devices. All the user needs to know is how to turn off the device and how to turn it back on.
- Mechanical damage . There are situations when you sit on a tablet and after that the sensor does not work. Mechanical failures include broken glass, dropping the device onto a hard surface, a strong blow to the device, etc. In most of these cases, the sensor needs to be replaced. But if the problem lies only in a crack or broken glass, then this does not affect the operation of the sensor in any way. However, it is recommended to replace the glass with a solid one so that its particles do not subsequently break off and damage the gadget.
- Liquid ingress . Liquid can get in if the gadget is dropped into water, or if it is exposed to rain or splashes. In addition to direct contact, moisture can form on the internal elements of the device by forming droplets. Because of this, the contacts oxidize and the process of corrosion on metal components begins. Therefore, it is better not to bring the device into rooms with high humidity.
- Damage or disconnection of the cable . The cable is responsible for the entire structure of the display, so problems with it lead to malfunctions of the touch panel.
- System malfunctions . Such problems include malware, memory debris, overheating, and incorrect installation of the operating system.
- Inappropriate firmware . One of the most common and serious problems after which the sensor on a device stops working is incorrectly installed or inappropriate firmware. Therefore, it is highly not recommended to reinstall the operating system without the appropriate knowledge, much less install custom or unsupported firmware.
- Calibration failed . On older models of tablet computers, the calibration sometimes gets lost, which means you have to re-adjust the display.
What can you do to prevent damage?
The main thing with any sensor failure is how to fix it. It is not always necessary to take the device to a service center; in some situations, you can fix the problem at home.
Therefore, below I have listed the most effective ways to prevent and correct breakdowns.
Wipe the screen
The first thing to do is wipe the screen. It would seem that this is an obvious action, but it is easy to forget about it in the event of an unexpected breakdown. The touchpad performs significantly worse if the display is contaminated with something that resists thermal fingerprints. Often this is an oily surface.
All you need to do is wipe the display well. To do this, it is better to first wipe with a damp cloth with detergent, then wipe with a dry cloth with fine lint.
Reboot
If minor system or software failures occur, you should turn off the tablet, then turn it on again. Since the touchpad does not work, the only way to reboot is by holding down the power key.
If a window with options appears on the display, you should release the power key and hold it again.
Pull out the charger
If you use a low-quality or unsuitable charger, this may lead to display failures. Therefore, it is important to use the original charger.
Low-quality chargers can generate interference, after which the touchscreen stops working. Artifacts and incorrect reactions to touching the display also appear on the screen.
It is better not to use the gadget while charging. If the device begins to work worse, you should try to remove the charger.
Important! All mobile devices heat up when simultaneously charging and active use (games, movies, applications).
Heating does not degrade the performance of the device, since the processor simply works harder and generates heat.
Display calibration with third-party programs
Touchscreen calibration helps when the initial calibration is lost. Symptoms that indicate calibration is being performed are that the touchpad works and registers all touches, but does not do so correctly.
For example, the user presses the lower right corner of the touchscreen, and a touch in the center is registered.
To calibrate the display, you need to download one of the many applications for this. One such software is Touchscreen Calibration. You can download the program from the Play Market. All that remains is to start the calibration, following the instructions in the application.
Check the cables
When the cable is disconnected, the screen does not work at all, but the device itself turns on and plays sounds. This does not mean that the display needs to be changed.
To insert the cable into place, you need to remove the back cover and align the cable to the main board.
If you do not know how to disassemble a mobile device, then it is better to take it to a qualified service center, where they will not only insert the cable correctly, but also find out whether this is the reason for the non-functioning sensor.
Fix with Hard Reset
Hard Reset - a complete reset of the system to its initial state. After it, all user data will be lost, so if the state of the device allows, it is worth creating a restore point or saving important files on an external drive, or using cloud storage services.
Hard Reset Instructions:
Important! The combination of these keys depends on the manufacturer and specific model of the device. Before doing a hard reset, it’s better to see how the recovery menu opens on your tablet.
Resetting the settings helps in most cases if the cause lies in a software or system failure.
Rollback firmware
Rolling back the operating system is the most definitive method. Here you need to reinstall the firmware, installing the previous version, which worked stably.
The advice only applies to incidents when the touchscreen began to work worse after the new firmware.
Instructions for rolling back the operating system vary depending on the model of the gadget. This is a capacious and serious process, so if you are not sure that you can carry it out correctly, contact a specialist.
Question answer
How to unlock if the sensor is dead
1. You can control a tablet PC that supports USB OTG using the mouse. Connect the adapter cable, and a cursor will appear on the monitor, with which you can unlock the LCD display and perform further actions with the device. For example, make a Backup before going to the service.
2. Will perform a complete reset of all settings:
- Hold down one of the Volume and Power buttons at the same time.
- Select Wipe data/factory reset.
3. Other ways to unlock a pattern or classic password on an Android device.
How to turn off or restart without a sensor
If the tablet does not turn off, it will be enough to hold the Power button longer. But remember that incorrect shutdown of the operating system will result in the loss of unsaved data.
If the button does not work and you need to turn off the tablet, you can:
- Remove the battery if it is removable;
- Wait until the battery is completely discharged;
- Use the Reset button. It is usually located on the back panel.
DIY replacement
If you still decide to change the touchscreen yourself, then you will need a flat-head screwdriver, tweezers, “stars” and great care when working with small parts.
- Remove SIM card and memory card
- Remove the back cover of the device. Do this very carefully so as not to damage the wires and cables;
- Disconnect the motherboard from the front of the tablet;
- Remove the microphone, speaker;
- Take out the cable;
- Carefully remove the matrix from the front panel of the touch screen;
- Remove the touchscreen;
- Glue the new sensor in place of the old one;
- Assemble the device.
Cleaning your mobile phone screen
First, you can simply clean the display of your device. You will not harm the phone in any way, but improve the connection and perhaps the problem will be solved. This method may help if the sensor does not respond to touch. What to do?
Take a suitable cloth and liquid to clean the screen. It is better to use lint-free or any other natural fabric. To clean the display, we will need a glass or monitor cleaner.
If this method does not help, then you should move on to the next steps. Of course, they may not help either. Only a professional can determine the true cause of the breakdown, but even he cannot solve every problem.
Software glitch that caused the display to break
All actions should be performed without a memory card. It may contain viruses that cause system malfunctions. After resetting the settings and cleaning the registry, you need to put the SD card in place and scan the device with an antivirus. Select full device scan and wait. But even after these actions, the sensor does not respond to touch. What to do? In this case, it is necessary to proceed to replacing the sensor, since the reason is not caused by a software failure.
Mobile phone display replacement
After disassembling your smartphone, you need to remove the display. It is necessary to check how the display is attached to the matrix. This can be done in two ways: monolithic or separate. This is very important, since when ordering a new screen, this aspect will need to be specified.
The sensor can also be connected to the circuit board in a variety of ways. There is a contact method, in which the sensor is simply disconnected, and a wired one. In the latter case, you should be very careful.
If you need to detach the matrix from the sensor, you must follow these recommendations:
All that remains is to attach the new sensor. How to do it? The kit should include the sensor itself and glue. First we apply special glue, and then carefully attach the sensor.
Cost of a new display
How much does it cost? Of course, the cost of the screen will vary for different smartphone models. On average, to change the display on phones with a diagonal of 4.5 or 5 inches, you will need to pay about 700 rubles.
If you don’t want to disassemble the phone yourself, you can contact a specialist. The master will ask about 2000 rubles. Although this procedure is not very complicated and you can change the screen yourself. You just need to approach this carefully and carefully.
Touch buttons don't work
The lower touch buttons directly relate to the screen and if they fail, you need to do all the steps that we have already considered. If the touch buttons do not work, you should first do a full reset. Next, clean the system registry and scan your device for viruses. Unfortunately, if the steps taken do not help, you will need to change the screen.
Electronic device components may be damaged if used carelessly. If part of the touch screen on your phone is not working, it could be due to either operating temperature or mechanical damage.
Repairing a smartphone or tablet with an insensitive touch screen will help solve serious problems. Sometimes simple cleaning combined with disassembling the case helps. However, if after all the user's actions the device does not turn on, it must be transferred to a service and this may result in additional costs.
Restarting the operating system
The next necessary action is to reboot the device. In most cases, this option becomes effective because there is no single operating system that works flawlessly. In other words, every mobile and tablet operating system has its own shortcomings, be it iOS, Android or Windows Phone.
Solve the sensor problem by rebooting the device
In case of a broken screen, you have two options to restart:
- Press the dedicated "Power" button (usually located on the top of the device);
- Remove the battery from the device.
When the device is working normally, check the installed applications and remove unnecessary ones. Next you need to clean the system. To do this, use special programs that can be downloaded from the online store for your device.
Instead of wiping the system, you can perform a factory reset, which will remove all your apps. However, the system will get rid of applications that do not work and cause conflicts, which will help you avoid similar problems with your gadget's sensor in the future.
To restart your tablet, follow these steps:
- Go to settings.
- Then find the “Backup and reset” item there, depending on your system it may simply say “Factory reset”.
- Touch the desired item and confirm to reset the current settings.
- Wait while the system performs the necessary manipulations with the tablet. After one minute, you can turn on the device and check the sensor.
Resetting your tablet to fix touch issues
Features of electronic devices
In addition to these failures, electronic devices may begin to fail due to the internal architecture. Limiting the size of components affects power dissipation if the tablet screen does not respond to touch - this may be due to the device being overloaded with a large number of resource-intensive applications. To prevent this, you need to start the task manager. Find out what's hogging your CPU and disable unnecessary apps.
Electronic devices have increased the sensitivity of screen sensors. The situation when the screen
tablet or phone does not work, may be due to simple contamination. The attachment of grease and dust to the surface causes the tablet to become unresponsive to touch.
If the screen does not work on the screen, the best solution is to send it to a diagnostic service center. Most models come with a very long warranty, allowing you to replace your device at no cost, no defects, no refunds. If the deal isn't guaranteed, you can probably just buy a new gadget and worry about it later.
A touch screen phone is a very functional and convenient thing. However, the more high-tech the device, the easier it is to damage it. The sensor (touchscreen) is the “Achilles heel” of modern gadgets, because it is very fragile and is constantly subject to mechanical stress. Careless users can place a bag on it, sit down, flood it, or even throw it against the wall in a fit of anger. And now the long-suffering phone comes to a point when the touchscreen sensor no longer responds to finger touches. What to do if the phone no longer obeys its owner?
Simple methods for restoring performance
In fact, in most cases you can fix the problem with improvised means. Let's figure it out:
- Physical impact – liquids, condensation, shocks and falls. If because of them the tablet stops functioning, then you are guaranteed a way to the service center.
Do not forget that if you decide to look at what happened from the inside, do not damage the cables (contacts) that connect the board and the display, but we still recommend not watching the video, but going to a specialist! 03/29/2016
