The screen on the phone does not work. Why the touch screen of a mobile phone does not work
A touch screen device is functional and practical. Unfortunately, the reliability of such screens is low and the question of what to do if the sensor on your smartphone stops responding is very often asked on various forums.
Since the phone does not have more buttons control, all functions of the device are lost in one second. Troubles usually begin after the mobile phone is dropped or moisture gets inside, or it may stop working on its own, as happens with Chinese phones.
There are various reasons that can lead to such a malfunction:
The phone's memory is overloaded and the device does not have enough resources to process clicks.
In the video, the sensor on the phone does not work, what to do:
Display dirty
Over time, the sensor may become covered with fingerprints or grease. This leads to deterioration in the sensitivity of the touchscreen. You need to thoroughly wipe the screen with a special liquid and a dry cloth.
Unsuitable temperature conditions
A sudden change in temperature may cause the device to stop working.
The cable is damaged or has come loose
It provides a connection to the touch surface. You can solve this problem yourself with a small screwdriver if your phone is out of warranty. If you have a warranty card, of course, go to a service center.
Due to moisture getting into the phone
When liquid gets inside the gadget, oxidation occurs. Try drying your device with a hairdryer.
Oxidation of contacts
This problem can be eliminated by careful cleaning.
Software failure
You need to reflash the device. To do this you need to have software and a USB cable.
The video sensor does not respond to:
How to reanimate a sensor at home
The very first thing to do is to restart the phone, while removing the battery and SIM card. Sometimes you need to reset your phone to factory settings. If a deep reboot did not help, then when performing further actions you need to understand all the risks and responsibilities.
In some phones, to get to the buttons you will need to disassemble the entire body of the device, and for this you need to study the sequence of disassembling the device. Without knowing this, there is a possibility of damaging the device, and the cost of repairs will be much more expensive.
Armed with special tools, carefully remove touch screen. After this, you need to carefully inspect the cables and connectors. The operation of all functions of the device depends on their integrity. If there is no damage, then simply disconnect the display from the board and connect it back.
Since the phone has already been disassembled, carefully wipe the dirty contacts on the board with a cotton swab and alcohol and put the phone back together.
In most cases, the reason the sensor does not work is because it is misaligned. You can put touchpad in place with a simple hair dryer. The secret is that the screen is glued to the body with a special glue, which softens under hot air and releases the sensor.
So in a cunning way it is easy to put in place.
When all the screws are tightened and the assembly is complete, you can install the battery and turn on the phone.
If after all the manipulations no changes have occurred, and the touchscreen still does not work, then a replacement will help you touch glass. This is something that is extremely undesirable to do at home and you cannot do without a service center.
You can find out how to find a person by photo on the Internet using your phone or tablet by reading this article.
You need to monitor your touchscreen phone and handle it more carefully than a push-button phone.
Do not drop it and do not allow moisture to get inside, and then you will encounter such problems less often.
U modern phones We can distinguish two types of screen failures: the image is not displayed on the screen and the picture is visible, but very poorly, i.e. the display backlight has disappeared.
In the production of screens mobile devices glass is used. Quite hard, but at the same time fragile material. If the display breaks, the screen will no longer show. After mechanical damage, cracks or leaks of black liquid crystal may appear on the screen. On some models, leaks may be bright red, orange, or yellow. In some LG smartphones, cracks are not visible at all, but a “sun” appears in the center of the display - a kind of physical damage to the screen.
A broken screen is the most common breakdown of smartphones and tablets, which occurs due to falls, shocks and other mechanical impacts on the device.
After liquid gets into a mobile phone, the display may stop working, and sometimes rainbow stains appear on the phone. The reason for complete or partial inoperability lies in the short circuit or “rotting” of the information tracks in the display or system board.
The problem can usually be resolved by cleaning the phone. Less often it is necessary to replace water-damaged components and restore “rotten” paths.
In cases where the screen continues to show, but spots are visible on it, you can try to restore it. To restore the screen mobile phone or a smartphone, after water gets in, remove the diffuser (part of the backlight) from it, glue its layers and wash the whole thing in pure medical alcohol. After drying, we assemble everything in the reverse order and connect it. In most cases, you can restore the screen completely, but the risk of damaging the fragile glass, after which the display only needs to be replaced, is always present.
After contact with liquid, and may appear. Typical cause of such failure in devices Nokia is the failure of the LM3500 chip.
A cable is an elastic flexible component in clamshell or slider phones, used to connect various moving parts of a mobile phone.
The cable is made of a special copper-based polymer that has a long service life when bending. A branded train can work for several years. Alternative options from Chinese manufacturers last from six months to a year.
If the phone (slider) did not fall and the screen stopped showing, then most likely this was due to wear on the cable. So the cable needs to be replaced.
First, you need to check the data bus that passes through the antistatic filters Z2402 and Z2403 to the X1500 display connector. If all signals are present, then check the data bus on the cable
In our case, it turned out that one of the signal circuits did not ring. I looked at the cable under a Chinese microscope and found a small chip on the paintwork of one of the tracks next to the connector, which is where the signal passed.
I replaced the damaged cable with a similar one, and the image appeared on the phone. If by chance you do not have a spare cable, then considering that the location of the damage was not on its moving part, you can restore the damaged area by overlapping soldering of thin wires.
There was a patient with broken display, but still partially working. The operation began according to the standard algorithm: we take out the SIM, battery and memory card. Then we remove back cover phone, under which there are two screws. We unscrew them.
We snap off the two latches on the right and left, and then disconnect the iron clip that holds cracked display. Carefully disconnect the connector so as not to damage the connector. And then we simply change the display to a new one and repeat the entire procedure in reverse order.
The more you paid for your new phone, the greater the fear of expecting problems with his work. Unfortunately, sometimes we are not even aware of the sources of problems in technology for various reasons. In most cases, this relates to ignorance of certain features of use, as well as a lack of respect for the technology. For example, after replacing the touchscreen, part of the screen does not work, and you were confident in solving the problem using this method. It is obvious that it will not be possible to solve it if the attitude towards technology remains the same. Therefore, we will look at all possible reasons why part of the touch screen does not work.
Part of the screen on the phone does not work
So, experts almost always advise using the method of elimination. The fact is that part of the screen on an iPhone sometimes does not work due to the simplest little things, which can be easily eliminated, and sometimes you have to completely change parts of the equipment.
Part of the touch screen on your phone is probably not working due to one of the following reasons:
- Sometimes part of the touch screen does not work due to simple memory overload. In our pursuit of greater opportunities and the desire to store as much information as possible, we do not notice how we simply overload our equipment. As a result, there are no more resources left for the touchscreen. And sometimes the equipment system fails, then you have to resort to the so-called deep reboot.
- Part of the screen does not work after careless handling. When was the last time you cleaned your screen? When traces of dirt accumulate on it, greasy spots, contact becomes worse and sensitivity decreases.
- The technique cannot tolerate temperature changes. This is one of the reasons why it is not recommended to carry your phone in your jacket pocket in winter. By the way, such changes can lead to condensation, which also leads to problems. The contacts begin to oxidize and the sensor starts acting up. In such a situation, it is enough to wipe the contacts with a cotton swab dipped in alcohol.
- In a cramped bus or just in sudden movement, you won’t even notice how you damage your phone. Part of the screen on the phone does not work after the smallest cracks appear.
- It is likely that part of the touchscreen on your phone is not working after a slight shift or partial peeling of the touchscreen itself. Here you can use the heating method with a hairdryer. The fact is that the sensor is fixed with a small layer of glue, which can be heated and set everything in place.
Phone screen not working? Urgent action must be taken. The main thing is not to start the problem. You can conduct the initial diagnosis yourself. To do this, you just need to call our consultant and together we will figure out what the problem is. But often it is not possible to determine a breakdown from a distance. So it's best to bring your mobile phone to our service center and we will carry out a free diagnosis. And this is the key to successful repairs.
If your phone's display does not work, this usually happens for several reasons. First of all, inspect the display. Are there any cracks, scratches or smudges on it? If everything is ok here, then the reason is this:
Why doesn't the screen on my phone work?
1. in 40% of cases, the screen on the phone does not work if the screen itself is damaged. Operation can be resumed only after replacing the component. We have a huge warehouse of spare parts. You can purchase any part here and try to replace it yourself. But we do not recommend doing this, as this is a difficult task. Our craftsmen will do everything quickly and efficiently, after which they will issue a guarantee for the entire device;
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2. In 30% the screen control chip is faulty. If it fails, then only replacing the component will help. You are unlikely to be able to do this on your own. Our masters have extensive experience and will always be happy to help you;
3. The phone fell and why does the screen not work? In 20% of cases the screen suffers from mechanical damage. The display may come off due to impact. printed circuit board. Then you just need to insert the cable back. This is often done in the presence of the client and does not take much time.
4. in 10% of cases there may be other problems; they can only be identified after diagnosis.
More and more users prefer mobile devices with touch screens. It is quite easy to operate. But it's not that difficult to disable it. Why the screen doesn't work touch phone? As a rule, it fails due to negative mechanical influences. If the touch screen does not work, then in this case only a replacement will help. We strongly advise against doing this at home. Since only qualified craftsmen can perform such complex work. It happens when half the screen stops and doesn’t work. Part of the touch screen does not work when sensitivity is lost in a certain area. In any case, if the touch display does not work, you should not fix it yourself.
It is not uncommon for the screen backlight to not work. If the display backlight has disappeared, this means that the problem must be looked for in the backlight circuit. As a rule, the phone screen does not light up if moisture gets into the device. Also, the reason why the phone screen has gone dark and goes dark could be the display itself, and then it will have to be replaced.
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What to do, conclusion:
In any case, no matter what problem you encounter, contact our service center for help. We employ only highly qualified specialists who will cope with any problem quickly, efficiently and at an affordable price.
Example from life:
The young man accidentally dropped his cell phone on the tile, after which it turned blue and did not react at all. Our service center did diagnostics and found that the display control chip was damaged, it was replaced within 2 hours. After which they tested and provided the client with a guarantee for the entire device.
Diagnostics are carried out completely free of charge. In most cases, it is carried out in the presence of the client and using professional equipment.
The warranty is issued for the entire device for any repair, and not just for the replaced part.
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After repair, the device undergoes free quality control.
Discounts are offered for repairs.
Only original spare parts are installed. We are suppliers of spare parts throughout Russia and because of this our prices are cheaper.
After the first repair, a VIP client card is issued for a discount from 10% to 40%.
Promotion! Until the end of the month, ultrasonic cleaning is free for any repair.
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The best service conditions are only in our service!
The screen on the phone does not work: what to do?
Vyacheslav Grishankov 09.10.
Unlike push-button telephone, the smartphone is controlled by touching certain points on the screen.
If it starts to work incorrectly or stops functioning completely, it becomes impossible to control the device. Let's look at the main types of faults and steps to eliminate them.
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The display responds erroneously to touch
For example, you click on on-screen keyboard one letter, and the adjacent one is entered. This means that the sensor needs to be calibrated. This problem can occur after minor impacts or exposure to a small amount of moisture.
Sensor calibration can be done on any smartphone - read our special article. After launching it, crosses are displayed on the screen, clicking on which “trains” the sensor.
The display is on but does not respond to touch
There can be many reasons for this malfunction. The most common is a lack RAM smartphone. This happens when the user opens many applications at the same time and the device freezes. A simple reboot of the gadget will help here.
Screen contamination
The next reason is screen contamination, which occurs due to fingerprints and wet hands. In this case, it is enough to wipe the display with a damp cloth. There are deeper contaminations when moisture gets between the glass and the sensor. Before taking your phone to a service center, you should try drying it with a hairdryer, but without too much heat.
Often such a malfunction appears when the phone is used outside in winter or in the heat in summer. The touchscreen “does not like” hypothermia or overheating. As a rule, when the ambient temperature normalizes, the viability of the screen is restored.
The display does not turn on, but the phone works
In such cases, the smartphone can even receive incoming calls. This malfunction also occurs for many reasons, but it is unlikely that you can fix it at home on your own. The fact is that such symptoms indicate serious and deep problems.
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One of possible reasons- problems with the display cable. The cable is a flexible strip with conductive tracks that connect the display to the screen control chip. Sometimes, due to a fall or impact, the cable simply becomes detached - in this case, it is enough to return it to its place. Often moisture or dirt gets under the contacts of the cable - cleaning the contacts can solve this problem. If the cable is damaged, it must be replaced.
Replacing the display
We looked at the simplest and most cost-effective faults. If the cause of the breakdown is the screen control board, or the display itself needs to be replaced, you need to think about the feasibility of such a repair, since its cost is often comparable to the cost of the smartphone itself. Judging by numerous videos, the process of peeling off the touchscreen from the glass for subsequent replacement does not seem difficult and it may seem that anyone can do it. But statistics from service centers indicate the opposite - too many new faults arise after home repairs.
If simple measures to restore the smartphone screen do not produce a positive result, it is recommended to contact a specialized service to avoid additional costs.
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What to do if the phone screen does not show, but works?
It is very difficult to use a phone whose screen does not show an image. However, what exactly should you do in cases where the phone screen seems to work, but shows nothing?
The simplest and most obvious explanation (missed by many, alas) has nothing to do with defects and breakdowns of the device. The dimming display is designed to save battery power in those moments when the device is not in use by the owner. The easiest way to solve this problem is to experiment and set the screen backlight time that is optimal for you. On long trips, this interval can be reduced to a minimum, and when returning home, you can specify the usual value.
Unfortunately, things are not always so favorable. A more serious reason for screen blanking is discharge battery. You can deal with it by recharging the device. By the way, if charging does not work, all the necessary recommendations are here.
From time to time the screen becomes unavailable due to software glitches. It is almost always possible to eliminate them by rebooting the device (turning it off and then starting it again). Sometimes the crash is caused insufficient power processor (especially for smartphones). There’s nothing you can do here on your own; not even all professional workshops will be able to change the processor.
It is recommended to restart your phone completely. That is, remove the battery, SIM cards, and preferably, also reset it to factory settings. This can be done if there are buttons in addition to the sensor, or if at least part of the sensor’s capabilities have not yet been lost.
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Let's assume the worst case scenario: all the controls are touch-sensitive, and the screen seems to work, but doesn't show anything. Then, if a deep reboot does not correct the situation, all that remains is to send the mobile phone in for repair. To speed it up, reducing the time lost on service employees searching for the causes of the problem, try to narrow down possible options. Damage to the sensor at the software level is most often associated with pre-installation various applications or manifests itself in the failure of various functions in turn.
Sometimes the phone display does not show due to hardware problems, then the “touchscreen” function suddenly disappears, and the display periodically turns off completely or partially. In some cases, as user experience shows, you can revive the screen if you completely discharge the device and then charge it to full capacity. Just don’t overdo it with “self-medication”!
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1 COMMENT
I have such cases, a reboot helps. But I didn’t know that I also needed to remove the SIM card and battery. And I don’t want to reset it to factory settings at all, because I’ll have to configure the phone from scratch. If the process of constantly turning off the screen has begun, then I think you need to look deeper for the breakdown. Or change your phone ;)
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What to do if your phone screen does not work, the answer is here
If you encounter a problem where your display does not work cell phone, then such a malfunction is a serious reason to seek help from a competent specialist. It is not recommended to carry out repairs yourself. Your initiative can only cause harm. It’s better to trust the employees of our telemama workshop to solve this problem.
Important: it’s really possible to implement with us high-quality repairs, which requires a minimum of waste. When repairing the device, we use only high-quality and original spare parts, which we receive directly from the manufacturer. If you manage to find somewhere the cost of service and original spare parts cheaper than ours, we will reduce the price for you. Each of our clients will certainly receive a long-term warranty, which will be valid for 1 year.
Why is my phone screen not working?
If your screen stops functioning, you can only determine why this is happening through device diagnostics. Such an operation in our telemama workshop is carried out absolutely free of charge.
As our practice shows, a problem of this nature arises for the following reasons:
- In most cases, the malfunction occurs when there is a problem with the display itself. If this is the case, then the display should be replaced. You can do this in our service center, since we always have all the necessary material at hand.
- If moisture gets into the device, namely on the connector, then diagnostics should be carried out to determine the extent of damage to the connector and screen cable. Often in in this case Parts may need to be restored after corrosion.
- After a fall, the display cable very often comes off, that is, the cable moves away from the board and the contact disappears.
- Problems often arise with software. In this case, you need to reset all settings or change the cell phone firmware.
- If you notice that the screen of your phone is glowing white, then this situation occurs after the device has been dropped. And if you don't see any cracks, it doesn't mean the display isn't broken. Since it consists not only of outer glass, but also of many components.
- Connect to device charger, let the battery charge a little
- Turn on your device. Connect your mobile phone to your computer
- Damage to the protective glass and stable operation of the device
- Image display but sensor damage
- Complete screen failure
In this article I will talk about the reasons why the screen/display on your phone does not work, and what to do in this situation.
Let's start in order.
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First steps and theory
The development of the mobile industry has taken the direction of increasing the size of the display and minimizing the number of mechanical keys. The screen is the main way you control your device, and damage to it can turn your phone into a useless pile of metal. There are many options for the screen to malfunction: from the appearance of small spots and defects to its complete inoperability.
Each breakdown is unique and requires separate consideration. You must be sure of the reason for the inoperability, otherwise dishonest service workers may profit from you. First of all, you need to make sure that everything is in order with the software part of your device. To do this you need:
If synchronization is successful, but no changes occur on the screen, the problem is in the components. Let's look at the main causes of malfunctions in the operation of the mobile phone screen and explain them.
Phone screen not working due to mechanical/physical damage
Every smartphone crash is a kind of lottery; everyone is lucky differently. One mobile phone may be left without a single scratch if dropped from a great height, while another may be damaged if it accidentally collides with a hard surface.
Mechanical damage is easily diagnosed with the naked eye. A growing crack, and often a “cobweb,” appears on the phone screen. There can be several outcomes in such a situation:
Replacing damaged protective glass depends on the device. Modern models are equipped with combined screens with a sensor and protective glass, which allows for minimal thickness. Replacing such components is expensive and requires replacing not only safety glass, but also other components. The same principle applies to a damaged sensor.
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If the protective glass is damaged, but the screen works, this is not a reason to continue using it. this device. It is recommended to urgently contact a service center, because your phone becomes vulnerable to moisture and liquid, which can cause more serious damage.
The phone did not fall, but the screen does not work. Causes of failure
Loss of functionality of a mobile phone screen can be associated not only with mechanical damage to the outer side of the display. Moisture ingress, breakdown of the screen control chip, wear or disconnection of the cable and other reasons depending on specific model, may result in the phone screen not working.
Moisture and liquid entering the phone body
Everyone knows from an early age that water has no place in electronics. If moisture or liquid gets into the phone, it will destroy the contact board. short circuits and other critical phenomena that impair the performance of the device.
Destruction of contacts on the board may require both routine cleaning and replacement of many components. If water gets into the device, it is recommended to immediately contact a service center for help. Water getting into the screen of a mobile phone can cause characteristic streaks and stains, which can be corrected by replacing the screen or modules.
Screen control chip failure
Failure of microcircuits in a device is not uncommon. The screen does not receive necessary information from the device and does not display the image. Reveal this problem regular means impossible, it will be determined at the service center. Damage can only be corrected by replacing components.
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Worn or disconnected cable
The cable connects the mobile phone screen to the device and is replaceable. This solution allows you to quickly replace the screen without interfering with the device board, but adds the possibility of detachment upon impact. Connecting the cable will not take much time and will not hurt your pocket.
Cable wear is typical for flip phones and sliders. In such devices, constant physical contact is created when opening and closing, which over time leads to a faulty state. In such cases, the cable is replaced at the service center and does not require the purchase of a screen module.
Dead pixels and spots on the screen
Dead pixels are active points on the screen that do not change color. The appearance of dead pixels is associated with a breakdown of the TFT transistor, which is attached to each pixel on the screen of your phone. It has been proven that the appearance of one dead pixel contributes to their further spread across the screen, but this is not always the case. Exists permissible norm factory defect of the screen, which allows the presence of “dead spots” on the device screen. You can diagnose this problem yourself, but it is better to contact a service center for a fix.