The screen on the phone does not work: reasons and solutions to the problem

Why the phone screen turned black - the most common reasons

A dark display (“brick”) occurs on smartphones due to defects in the cable that connects the main board to the screen. A complex case requires the mandatory intervention of service center engineers. The causes of operational problems are:

Mechanical damage. The gadget fell or received an imperceptible blow. After the shock, a component (or several) of the microcircuit failed.
Condensate. Water has entered the housing or moisture has formed due to a sudden temperature change. Parts oxidize, resulting in a black screen.
Crash after installing programs. If an error occurs during an OS update or application installation, the device does not go into “brick” mode.
The battery is low. Due to a faulty charger, breakage or oxidation of the USB socket, the battery has been deeply discharged. The phone does not have enough energy to start the operating system, so the screen turned black.
Buttons. After the mechanical switches have exhausted their service life, the gadget does not respond to the power-on command.

Common touch screen problems

There are several reasons why your phone has a black screen:

the device fell;
the microcircuit has failed;
the connecting cable flew out;
moisture has entered the device.

It is almost impossible to immediately understand why the phone screen does not work. The only exceptions are obvious damage that leads to the appearance of cracks on the display or deformation of the case. But first things first.

Black screen on the phone - what to do if the phone is working

If the display on your device is dark, we recommend rebooting the device. Press the “Power on” button with your finger and hold it for 1 minute. Open the back panel, pull out and return the battery. If the method does not help, then proceed to the next procedure:

Press the “Power” key and the sound adjustment carriage for 5 seconds.
If the screen on your smartphone is black, then hold down the power and volume buttons for 5 seconds.
Home element. Pressing “Home” at the same time is added to the key combinations.
The gadget reboots and starts with a working display.

Enable monochrome screen on Samsung Galaxy

On Samsung Galaxy smartphones, turning on the black and white screen can be much easier:

Go to Settings - Accessibility.
Open the Visibility Enhancers settings section.
Click on "Color Settings".
Set the switch to On and select Grayscale.

This will complete the necessary settings, and the image on the screen will turn black and white.

Keep in mind that despite the monochrome image you see on the screen, the videos, photos and even screenshots you take will actually be saved in color.

What to do if your phone does not respond to touch

If you run several applications, the device does not respond to touches. A lack of RAM on the device leads to freezing and a black screen. A reboot will help solve the problem. After the OS starts, they go to the section of running programs and stop unnecessary ones.

If the display is dirty, the device does not respond to commands. To get rid of the malfunction, just wipe the glass with a napkin. It is dangerous to get moisture between the protective screen and the sensor. In cold weather, the performance of the device decreases. When the temperature normalizes, functions are restored.

Often the gadget receives incoming calls, but due to the blackness of the screen it is impossible to answer. Cleaning the contacts from dirt will help solve the problem. Sequence of user actions:

Remove the back cover. The thin edge of the plastic card is hooked into a special recess and the panel is lifted.
Take out the battery.
You need a partition over the main board of the smartphone. Unscrew the bolts that hold the element.
The part is carefully removed. If the component does not lend itself, we recommend prying it with a payment card.

Carefully inspect the surface of the board for the presence of oxidized parts and defects. After moisture enters the microcircuits, destructive processes occur. Changes can be easily recognized by a white coating on the components. If you smell the phone, you will notice a noticeable metallic smell. Remove the problem using the following algorithm:

Wet the toothbrush in medical alcohol or Galosh solvent. Gently soak the bristles, trying to avoid excessive absorption of moisture.
Slowly rub plastic hairs over the affected areas. Use circular movements to wipe off oxidation deposits from parts.
Assembling a smartphone.

We recommend checking the functionality before assembling the case. They attach the partition and battery and start the gadget. If after the manipulations the operating system started and the black screen on the phone disappeared, then screw the bolts to the parts. The presence of abundant areas of oxidation requires professional equipment, so the device is taken to a workshop.

Conclusion

This article details how to fix black screen on Android phone. Most cases are the result of a frozen application, or due to a lack of resources, the utility did not start in time, which led to the appearance of a black screen. Therefore, the problem is often solved by a regular reboot, often a forced reboot or a reset. Hardware problems and manufacturing defects are rare. At the same time, malfunctions of this kind are often eliminated only in a service center.

Have you encountered a problem with a black screen? Share in the comments how you managed to solve the problem.

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Trying a factory reset

Configuration changes, installation of applications or inappropriate firmware often provoke system failure. If, after updating or installing the software, a dark display appears on your smartphone, then you need to return to the factory settings. Sequence of user actions in case of a problem:

Open the recovery menu. To go to Recovery, you need to hold down the power and sound keys simultaneously for 5 seconds. On some models, the login combination is Home and Power.
The smartphone displays the manufacturer's logo or operating system version. The OS boots in recovery mode.
Light inscriptions appear on a dark background. To move through the list, use the sound carriage.
Goes into data deletion and settings reset mode. Use the button to move to the “Wipe Data/Factory Reset” line.
In the menu that opens, select the option to destroy information. You move to the item using the power key.
Triggers a configuration reset.

During the procedure, you cannot interrupt the process or restart the phone yourself. If the actions were successful, the operating system starts. The user will be prompted to enter the login and password for their Android or Apple ID account. After restarting, the device operates in standard mode.

To avoid problems with unsuccessful updates or failures after installing applications, you should not install software from unverified sources. Viruses are often the culprit behind a black screen on a smartphone. Programs with malicious code disrupt processes, which leads to the emergence of a “brick”.

Enable developer mode

In order to make the screen of an Android device black and white (or monochrome), you must first obtain developer rights. After this, you will have access to an additional section with settings, where you can enable this function.

To get developer rights, you need to open Android settings, go to the “About phone” section and click on “Build number” several times.

After this, a message will appear on the screen stating that you have become a developer.

We fix it using firmware

You can revive a “dead” phone using special software. The SP Flash Tool application supports old and new models of Chinese smartphones based on MTK. Sequence of user actions:

Download the program and install it on your PC.
The gadget is connected to charging for 2-3 hours. The battery indicator should not decrease during the procedure, otherwise the device will have to be reanimated in the workshop.
If the antivirus complains about third-party applications, then the protection is temporarily deactivated during the recovery period.
Download the official firmware for the gadget model.
The software file is located in the Windows root folder.
After startup, select the OS bit size (32 or 64).
Click the mouse on the button with the image of lightning. Switch to Flashmode.
The available firmware is indicated in the drop-down window. Do not connect your smartphone without a command.
After installing the software, connect the device to the PC via a USB cable.
The software detects the device and begins recovery. During the procedure, the phone is not pulled or turned on. The signal to complete the process will be the inscription “Flashing finished”.

The Flashboot program helps revive a gadget with a black screen. Initially, the software was used to work with Sony models, but now the functionality of the application has been expanded. User action algorithm:

Download and install the software on your computer.
The gadget is connected to the PC via cable. If Flashboot picks up the device, then the software is compatible.
Disconnect the device and close the application. The saved firmware is placed in the firmwares folder.
They launch the program, press the lightning button.
Select “Flashmode” from the modes.
In the window that opens, mark the microutility from the firmwares directory.
The software automatically installs file updates. After installation, it prompts you to connect your smartphone to your computer.
Watch the status bar. The procedure is completed after the “Flashing finished” entry appears.
Android is turned off and rebooted.

Samsung gadgets are restored using the proprietary Samsung Kies utility:

The application is downloaded from the manufacturer’s official website.
After installation, connect the phone with a black screen to the PC using a USB cable.
In the “Tools” tab o.
Select your model from the list that opens.
Enter the Recovery password. The symbol combination is located under the device name.
They press the start button.

After the procedure is completed, the device OS starts. If there is no phone data in the list, then the bootloader has been damaged. To troubleshoot unsuccessful installation problems, use the Odin application. Sequence of user actions:

Reset the gadget settings to factory settings. Simultaneously hold the power buttons and the sound carriage (5 seconds). Go to the Recovery section and delete all data.
Download and install Odin on the PC.
Go to the firmware page. In the search box, enter the model and the country you need.
Download the file and install.
The gadget is switched to Odin mode. Simultaneously press the “Home” and volume down keys. The device will alert the user with a sharp sound.
Connect the smartphone to the PC via a USB cable.
Launch application One. Select the button labeled PDA, and inside the directory with the unpacked archive take a file with the extension *.tar.md5.
They press start and wait for the process to complete.

After a reboot, the smartphone returns to its original firmware. If Odin does not recognize the device, then we recommend running the application as an administrator or installing a newer (older) version. Restarting the computer and using a proprietary USB cable helps. Often the antivirus blocks the operation of third-party programs, so they are deactivated during the procedure.

Benefits of monochrome mode

A colorful interface is one of those factors that users like so much and attracts their attention. Scrolling through a monochrome Instagram feed or playing black and white games, you see, is not that interesting. A black and white display is not capable of conveying all the beauty to the world, but this can also find its advantages.

A bright display affects the rate at which the battery drains, but if you make it monochrome, this technical feature practically disappears. That is, a black and white screen drains the battery much more slowly. In addition, clicks on black and white links are reduced significantly, since they do not look as interesting.

Of course, it is quite difficult to completely return a smartphone to the model of the past, but it is quite possible.

For this purpose, the Internet project https://gogray.today/ was created in 2020. Its creator, Reiman Ata, teaches everyone who wants to switch gadgets to monochrome mode. The man came up with this idea after he calculated the amount of time he wasted on his phone.

With the help of the project, the author himself was able to reduce the number of hours spent on a smartphone by half. A positive result was noted already on the first day of operation of the single-color mode.

If all else fails

If the device vibrates slightly when you press the power button and does not function, there may be a problem with the battery:

Connect the device to the power supply.
After 15 minutes, a charging indicator appears on the screen.
They start the phone.

If the device does not turn on, then check the functionality of the hardware. Connect the smartphone to the computer via a USB cable. The PC should correctly recognize and open the gadget. We recommend connecting the equipment without a battery to a PC or to the network via a charger and observing the reaction of the operating system. When an indication appears on the screen, the cause of the failure is the battery.

The removable battery can be easily recharged using a universal device (“frog”). The element is set for 3 hours, the charge level is monitored and returned to the smartphone. When fully discharged, connect via USB cable to the PC and leave for 60 minutes. Exposure to low-frequency current will gradually “wake up” the device.

If you can’t restore the functionality of your smartphone, then contact a service center for help. Any interference in the functioning of the operating system will remove the warranty from the new copy. Manipulations with equipment should not be carried out without identifying the culprit of the problem.

Vyacheslav

For several years he worked in mobile phone stores of two large operators. I understand tariffs well and see all the pitfalls. I love gadgets, especially Android ones.

Ask a Question

Question to the expert

While installing the official firmware, the smartphone turned off due to low battery. The gadget does not start, how to fix it?

Connect the device to a computer or charger for 3 hours. If the OS does not start, then reset the settings through the Recovery menu.

The phone fell and does not turn on, what should I do?

A strong shake, impact or fall damages the parts (cable, conductive elements) on the board. Mechanical defects are repaired at the service center.

How do you know if your battery is dead?

A USB tester is used to measure the current level. The miniature screen displays standard indicators and measurement results.

4.5 / 5 ( 22 voices)

Go to the “For Developers” section

Next you need to open the “For Developers” section. To do this, return to the main Android settings screen and follow the path “System - Advanced - For Developers”.

In older versions of Android, the "For Developers" section may not appear in the "System" section, but on the main settings screen. Next to the “About phone” item. If you can’t find it, try using the search in Android settings.

Does black and white screen mode help fight smartphone addiction?

Smartphone addiction is becoming an increasingly important and painful topic: in Google trends, the query smartphone addiction and related topics have become noticeably more popular over the past year. The creation of technological products is increasingly using knowledge of the mechanisms of addiction, and companies are appearing in the world whose main offer is the creation of addictive interaction experiences.

However, not all Silicon Valley employees support this practice. Last year, one of the first Facebook investors, Sean Parker, expressed regret that the social network was initially created with the goal of creating addiction among users. Another opponent of established development methods was Tristan Harris, former head of design ethics at Google. After leaving Google in 2020, Tristan founded the non-profit organization Time Well Spent, which aims to combat the uncontrolled use of digital devices and the crisis of attention among users. Now Harris talks about how technology manipulates our attention and how we can fight it.

One of the steps to change your interaction with devices is to consciously change your smartphone screen. Harris advises keeping only apps that perform a single function, like Uber, on the first screen, and grouping the rest into folders on the second screen. Another tip is to enable monochrome screen mode. So, Dmitry Bilash wrote about his similar experience on Facebook:

A black and white screen deprives us of the ability to focus on familiar colors and forces us to think more carefully about the purpose for which we unlocked the screen. The absence of colors makes interacting with your smartphone less enjoyable and can therefore reduce the time you use your phone. My friend conducted a similar experiment on herself, and this is what she says about it:

Tanya, student, 22 years old:

This experiment is inaccurate because I didn’t track how much time I spend with the phone in color mode and how much time in black and white, so I rely on my own feelings, emotions and vision.
Firstly, with the black and white mode you can’t really look at pictures and stories on VKontakte and Instagram. So I listened to music (yes, through my phone, but I very rarely looked at the screen).
Secondly, I am still dependent on contact and therefore read the news feed, but at the same time I scrolled through the pictures faster, since they did not attract me, and paid more attention to text posts or read articles on Telegram.
Thirdly, it is difficult to watch videos in black and white mode. It was important for me to watch one video on YouTube, and so I switched to color mode once.
I didn’t play games, I didn’t look at photos on my phone, I didn’t go to Snapchat. I looked at the notifications longer, I had to look at the icons: this is a message, and this is mail. In VK it was inconvenient to search for people in the dialogue, since I usually look at a photo and identify a person from it. I didn’t use emojis much in correspondence, because they became more difficult to find.
In general, the phone in black and white mode became sad, and I didn’t really want to look at it. I will experiment further, I hope this will only lead to better results.

I would like to add that the monochrome mode of using a smartphone not only eliminates distractions such as Instagram or YouTube, but also helps to be less distracted by the smartphone while working. The pleasure of using it really becomes less, so I noticed not only a reduction in the time I used the phone, but also an increase in productivity.

If you also want to test for yourself the effect of the lack of colors on the screen, here's how to do it:

iOS: Settings - General - Accessibility - Keyboard shortcuts - Color filters. After this, black and white mode can be activated by triple pressing the Home button.

Android: You need to enable developer settings first.
To do this, in the settings you need to open the “About phone” item, in which you will need to make seven quick taps on the “Build number” line. For smartphones with Xiaomi firmware, the same needs to be done with the “MIUI Version” line. You will have access to settings for developers, in which you will need to select the “Simulate anomaly” item and set the monochrome mode there. If you find a typo, highlight it and press Ctrl + Enter! To contact us you can use

How to get rid of a dead pixel on a smartphone screen?

The appearance of a dead pixel (or several) on a smartphone is not a rare occurrence. Sometimes it's even a factory defect. But very often, if the display is not checked before purchasing, the user may notice this defect after some time. After all, a dead pixel can only glow in a certain color.

A LITTLE THEORY

Most smartphone displays are made up of pixels. Each individual pixel consists of three sub-pixels, namely red, green and blue. The combination of these colors in various variations results in a wide light spectrum.

If you find a point of black, white or any other color that does not fit into the overall color picture, then your smartphone display has a dead pixel.

Dead pixels can be divided into 2 classes:

dead pixels;
dead pixel (stuck).

Dead pixels

- this is when the pixel does not “light” at all. In fact, he's burned out. It is always black on any background. Such pixels cannot be restored. Only replacing the screen will help.

A dead pixel is one or more “stuck” points on the screen matrix, displaying two colors out of three (or one out of three), which leads to the incorrect display of the final color of a given pixel. It is these pixels that can be “cured.” This is what this article will discuss. We will not consider options with mechanical impact on the screen, heating, cooling, disassembly and other options that should be dealt with by specialists at the service center. We will talk about programs that, in a certain way, repeatedly use the pixels of the screen over a certain period of time, which in turn can return the “stuck” pixels to their normal functioning, in a word, “revive”.

HOW TO DETERMINE THE PRESENCE OF A BAD PIXEL

Due to the fact that the resolution of modern smartphone displays is already quite high (FULL HD), and in more expensive devices it is even higher (FULL HD+, 2K), detecting a dead pixel “without the naked eye” is quite problematic.

There are several ways:

smartphone engineering menu;
third party applications.

Engineering menu.

We will not dwell on the description of this method. We have already published an entire article in which we described in detail the opportunity to test not only the quality of the display before purchasing, but the entire smartphone as a whole, as well as our recommendations. The advantage of this method is obvious. Absolutely any smartphone has an Engineering menu; there is no need to install any software, all components of the device can be checked using standard tools.

Screen test apps.

There are many programs of this kind in the Play Market Just type in the search: “test display” or “screen test”. A large list of programs will be displayed that can help you identify a dead pixel (or pixels). Why are there so many programs of this kind? Yes, everything is very simple. To identify such a defect in the display, the usual filling of the screen with different colors is used. This is how you can notice a pixel that has a glow that is different from the color with which the screen is filled.

PROGRAMS FOR RESTORING DEAD PIXELS

Let's look at some of the programs.

JScreenFix

This program has a very simple design with minimal settings. After launch, a window appears with short instructions.

By clicking on the “Fix Stuck Pixels” button, the procedure for restoring dead pixels will start.

Although the instructions indicate that the “treatment” mode needs to be run for about 10 minutes, to achieve any result, it actually takes longer, especially if there are a lot of dead pixels. It is better to start this procedure at night, remembering to connect your smartphone to the charger, because... During the entire process, the screen will remain on and the phone may simply die. This clarification applies to all programs that will be presented below.

Pixel Fixer

Another similar program without any settings. I launched it, clicked on the green circle - the process began.

Treatment of dead pixels

This program is equipped with more diverse functionality and settings.

In addition to the procedure for repairing dead pixels, this program has a built-in display test, which is necessary to identify screen defects. By clicking on the “CHECK PIXELS” button, we proceed to the testing procedure.

It is possible to select a testing mode. Automatic and manual. In automatic mode, the colors will change each other in a circle, covering the entire spectrum of colors. No action (except for carefully examining the screen) is required from the user. The process will continue until you exit it. If there is a need to check for dead pixels on specific (primary) colors, then a manual test will help. The primary colors will be displayed in turn, moving to the next one when you tap anywhere on the screen.

If during the test you discover defects in the smartphone screen and there is an opportunity to fix it ("stuck" pixels are detected, not dead ones), then you can immediately proceed to the process of restoring dead pixels by selecting the "PIXEL TREATMENT" item.

By selecting “START”, the “treatment” procedure will begin. It will continue until you stop it yourself. If you select the “START ON TIME” item, you can manually specify the period for the recovery.

The “treatment” process is as follows:

We really hope that in the process of testing the display of your smartphone, you did not find the presence of dead pixels (and even more so dead ones), but if they are still present, do not despair. In most cases, the procedure described in this article will help you “resurrect” those that are not working properly. Do not expect to fix the problem in a few minutes (although it happens that a dead pixel is restored quite quickly); as a rule, recovery takes much longer. But it's worth it! You can get rid of that “eyesore” pixel (or several) and enjoy the quality of your screen for a long time.

Leave comments. Write how useful the information presented in this manual was for you. Did you manage to get rid of the display defect?

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