How to change the touch screen on your phone. How to replace a resistive touchscreen on a Chinese phone

Replacing the sensor on your phone with your own hands is not a very difficult task. In this article I will show you how to replace the sensor on your phone with a minimum of knowledge and a primitive set of tools.

Replacing the sensor on all devices, except those where the display and sensor are combined into one module, is performed in the same way. Therefore, this instruction will help a lot of people, even regardless of the phone model. There may only be differences during disassembly, but the technology and procedure will be the same for almost everyone.

They tried to close the door with this device (it was in the back pocket, and they closed the door with their butt). The door, of course, was closed, but the phone could not withstand this violence and happily shone with multiple cracks in the touchscreen

The display worked well, so only the sensor needed replacing.

You can, of course, take it to a workshop, but that’s not interesting and will be more expensive than replacing the sensor yourself :) Moreover, it’s absolutely not difficult.

What you need to replace the sensor on your phone

To replace the sensor we need a minimum set of tools and materials:

• screwdriver
• plastic card or something similar
• regular tape
• new sensor
• tweezers
• accuracy)))

Remove the back cover of the phone and take out the battery. We can say that half the work is done :)

We unscrew all the screws and put them in a secluded place so that they don’t get lost.

After this, use a plastic card to separate the halves of the phone case

Unsnap all the latches and remove the back of the case

Unfasten all interfering cables. On this phone there is only one - from the display

We check that nothing else is holding it anywhere and remove the phone board

put it aside

We see the sensor cable. Here it is primitive, so it is not even attached to the board, but simply pressed against it. This is a resistive sensor. You may have a capacitive one - it is larger and is usually connected to the board through a connector. How to disable them is described in detail in the article. I highly recommend reading it.

Now we need to peel off the sensor from the phone body. To do this, we pry it off and use our plastic card to guide it around the perimeter of the sensor

To make it easier, you can warm it up with a hairdryer.

Attention! Be careful when peeling off the sensor and take precautions because it is glass! You can cut yourself, a piece of glass can fly into your eyes, and so on!

This is the picture we got

Use tweezers to remove the remaining fragments and remove the work area from the glass.

Let's take a new sensor

It is covered with film on both sides. And without the film, they won’t exchange it under warranty if it suddenly turns out that it’s not working! Therefore, our task is to connect it for testing, and only then, after removing the protective film, paste it in its place.

It looks like this

That is, we assemble everything in the reverse order, but do not glue the sensor. We turn on the phone and, touching the sensor, check its operation over the entire area.

If everything works fine, then remove the film, remove debris from the display and press the sensor into place.

Here you may reasonably have two questions:

• How and how to clean the display from debris and fingerprints?
• How will the sensor stick?

The answer to the first question. Don’t even think about rubbing it with anything, you won’t achieve anything by doing this, you’ll only scratch it. The best way for me to clean the display is regular tape! Simply glue and peel it off sequentially over the entire display area and all dirt will remain on the tape and not on the display.

The answer to the second question. In this phone, the adhesive composition is applied to the device itself and it remains sticky for many years. The main thing is that after disassembly, dust and debris do not fall on it. But in most cases, the sensor is glued to double-sided tape, which is glued around the perimeter of the new sensor. You only need to remove the protective film or paper and glue the sensor to its rightful place.

Here, in principle, are all the simple steps to replacing your phone’s sensor. As you can see, everything is simple and fast.

If you have any questions, ask in the comments.

Peace to your home and strong phones!!!

Often, when touch phones or tablets are handled carelessly, cracks or so-called “cobwebs” appear on the front panel of the device after unwanted contact with asphalt or other hard objects. Here we will try to explain what to do and how to understand what has broken.

1. Cracks appeared on the front part. Can it be replaced?

We are often mistaken in thinking that the front of the device and the sensor are two different parts. This is wrong. The front part of touch phones is the touch glass itself (touchscreen). There are cases when, after a fall, the touchscreen continued to work, although it had visible damage. But, as a rule, over time, spontaneous clicks, incorrect reactions to touches, or complete inoperability appear. If your front part is broken (also called protective glass, not to be confused with protective glass that is glued instead of film), then you will have to change the touchscreen (sensor).

2. The sensor is broken, but the display works. Will it be possible to just change the sensor?

There are models that have a module where the touchscreen is “glued” to the display. This depends on the model of your device.

3. And then they change the sensor on the module!

There are times when a person, having come to the Workshop and heard the cost of replacing a module, is indignant that in some Workshop they change everything separately. Replacing the touchscreen separately from the display when the module is installed is quite possible and practiced, but no technician can give a 100% guarantee that the procedure for removing your old, broken touch glass will be successful; often in the process of “unsticking” it is damaged and breaks display and replacing the entire module cannot be avoided. And the final cost of repairs to replace the sensor glass in the module is not significantly different than replacing the entire module.

Briefly about the main thing:

1. By breaking the front panel of a touchscreen phone, you have broken the sensor itself (touchscreen). Therefore, it is precisely this or the display module that changes (depending on the device model).

2. If after a fall and cracks appear on the sensor, it continues to work - remember that this is temporary. The slightest further damage can disable it. So, it is advisable to replace it as soon as possible while the phone is still working. Or at least extract from such a device all the information that is important to you (photos, videos, contacts), if repairs are not planned in the future.

3. In models that have problems with the module (sensor and display), it is better to immediately replace the module.

4. Having saved on the quality of parts once, you risk paying again soon, and for a larger amount.

After your mobile phone falls, does it have a gorgeous crack on its screen? Or have you personally become convinced of the dangers of alcohol by accidentally flooding your phone with champagne? Or maybe the touch screen has stopped responding to touches for no apparent reason?

Don't panic, even if your gadget costs a lot of money. Replacing a touchscreen or a regular LCD screen is today one of the most common mobile repair services that does not take much time.

The most common reasons why the phone screen does not work

It is difficult for a modern person to imagine his life without a mobile phone. He accompanies his owner everywhere, getting worn out and exposed to all sorts of dangers. The display, a rather fragile part used to display graphic information, breaks down especially often. It consists of glass with a layer of cells filled with liquid crystal, the body of the display itself and backlight diodes.

The most common reason that the screen does not work is mechanical damage. What they don’t do with phones! People sit on them, step on them, place heavy bags on them, drop them from heights, throw them against the wall in a fit of anger... The list goes on for a long time. And if the owner of the phone likes to stuff it into the back pocket of his jeans, this increases the likelihood that the screen will be crushed. In all these cases, replacing the display is the only way to bring your mobile friend back to life.

Another common problem: the phone fell into water or was filled with another liquid. If this happens, the phone needs to be shown to specialists as quickly as possible, since the liquid starts the oxidation process, and it can completely ruin your mobile phone. Only after drying, cleaning and diagnosing it will the verdict be established: whether the screen needs to be replaced or whether it can be repaired.

But the phone does not always suffer at the hands of a careless owner. Here are some more common problems with mobile phone screens:

• The phone works, but only a white screen is visible. In this case, the following problems are possible: the controller on the phone board is faulty, the program has crashed, the cable is damaged, or the phone display needs to be repaired or replaced;
• The screen glows dark blue: problems with the controller or the display itself;
• Ripples on the screen: you need to change the screen or troubleshoot the controller;
• The image disappears and appears again, or the image is distorted. This is a common problem with flip phones and is caused by a malfunction of the cable (the flexible part that connects the two halves of the mobile phone);
• The screen works, but the picture is hard to see. In this case, the screen backlight has failed. Most likely the backlight circuit is faulty.

If you notice that your phone screen is not working correctly, you should not delay going to the service center. After all, the sooner the mobile phone is in the hands of specialists, the greater the likelihood that it will be possible to restore its operation.

Replacing the touch screen

A touch screen phone is a very convenient and functional device. But the more complex the gadget, the greater the likelihood of it being damaged. The touchscreen (touch screen) is the “Achilles heel” of modern mobile phones, because this part is constantly subject to mechanical stress. Fragile glass can be easily crushed, broken, or flooded. Fortunately, replacing a touchscreen is a simple and time-consuming procedure for Mobilamaster service technicians.

Remember: touch screens that don't work or are broken cannot be repaired! Replacement of the sensor or touch glass is required if:

• it has one or more cracks;
• the touchscreen has stopped responding to touches or reacts to them as it pleases;
• The mobile phone freezes during touchscreen calibration.

The sensor has several active layers, and if at least one of them is damaged, the touchscreen stops working. Often, if the touch screen does not respond to touch, it is the glass that needs to be replaced, not the screen itself. You can get by with such “little loss” when the image remains clear, there are no dark spots or spots visible on the screen - the touchscreen simply does not respond to touches (this is possible on Nokia phones, iPhone, where in most cases everything is changed separately, and therefore much cheaper than change the screen module assembly).

If the image becomes blurry, unclear, is not fully displayed, darkening is visible, or there is no image at all, the screen will need to be replaced. The price of this service, accordingly, will be more expensive (how much a screen replacement costs depends on the phone model).

If the touchscreen does not work, do not try to fix the phone yourself, so that you do not have to buy a new mobile phone later. Replacing the glass or screen of a phone must be done in a workshop, using original parts, since Chinese counterfeits quickly fail, after which it is impossible to repair them. After replacing the sensor at the service center, you should be given a guarantee for the work performed and for the installed part.

When does a phone screen need to be replaced?

You will have to change the glass or screen of your mobile phone if:

• As a result of careless handling of the phone, the screen is broken. The result is cracks, cobwebs on the screen, or leakage of the liquid crystal (this substance is usually black, but in some models it is red). It doesn’t matter how many cracks appear on the display, one or several. Screen replacement is inevitable;
• The display is “decorated” with stripes or the so-called “sun”;
• Smudges have formed on the screen - this usually happens after moisture gets into the phone.

Remember: a mechanically damaged screen cannot be repaired! If not everything is so “lethal”, then in some cases you can get by with repairs, for example, if there is a malfunction of the cable, the backlight circuit, or problems with the image controller.

Other problems may occur that do not require replacement of the display. For example, the screen does not show anything, but the screen itself is not damaged. In this case, the picture disappeared because the display connector came off the board. Another “misfortune” is software failures. This can result in the image disappearing, but this problem is corrected by firmware.

Is it possible to replace a mobile phone screen yourself?

If you always got only A's in labor classes and have no doubt that your hands are growing from the right place, you can try changing the phone screen yourself. In addition to the new display, you will need a set of special screwdrivers. Special screwdrivers are needed to avoid damaging the slots on the screws. Most likely, you won’t need a soldering iron - modern mobile phone displays are not soldered, but attached to a cable.

Before replacing the display, turn off your mobile phone, remove the SIM card and battery from it. Choose from a set of screwdrivers the one that matches the slots on your phone's screws. When working, it is best to use a step-by-step guide on how to replace the screen - tips can be found on the Internet.

Use recommendations specific to your mobile phone model, since there are significant differences in the methods of attaching parts of different phones and other nuances. For example, replacing a Nokia screen will be significantly different from replacing a Samsung screen.

When replacing the phone screen, be extremely careful, put screws and other parts in a place where they cannot be accidentally removed with a careless movement, write down which holes in the phone correspond to screws of one length or another.

Despite the fact that there are a large number of sites on the Internet that post step-by-step videos, photographs and recommendations that help you replace your phone display, you will not have a guarantee that after such amateur activity your mobile friend will not break completely.

Therefore, if you are not one hundred percent confident in your abilities, it is best to turn to specialists. Replacing the touch glass or screen will require certain investments, but you can be sure that everything will be fine with your gadget! This is especially true when replacing the sensor in NTS smartphones - this should be done by a qualified professional.

How long does it take to replace a phone screen?

Replacing the glass or screen of a mobile phone is a common service that is performed promptly in the workshop, often in the presence of the owners themselves. 30-50 minutes, and your phone will serve you like new again. Replacing the sensor on smartphones takes about 1-1.30 minutes.

This efficiency serves as another argument in favor of the fact that specially trained people should repair the phone. Even if you can replace the display yourself, most likely it will take a lot of time, because you will have to study recommendations and materials, select spare parts, etc. And time, as they say, is money.

When repairing, use original spare parts, and after that, be more careful with your mobile friend, and then it will serve you for many years!

Unlike desktop computers, functions and programs in tablets are controlled by lightly pressing the fingertip on the screen at the desired point. The tablet reacts to touch thanks to a thin transparent glass plate superimposed on the display screen. When you press on the glass (touchscreen), depending on the type of sensors, the resistance, inductance or capacitance of the mesh applied to the glass changes and thus the tablet receives instructions for a specific action.

The touch glass is very thin, but strong enough to break with your finger. But if the tablet is dropped on a hard surface or hit with a sharp object, the touch screen cracks, which is what happened with the glass of the children's MonsterPad tablet shown in the photo.

Checking the tablet's functionality using the mouse

The image on the screen was uniform without defects or distortions. The tablet remained operational, since when you pressed the Power button, a window popped up with a menu to turn off the tablet, but it became impossible to control its operation by touching the screen with your finger.

To fully check the functionality of the tablet, and the ability to turn it off before repair, it was necessary to connect a mouse to the Micro USB connector located on the side of the tablet. Mice usually have a USB connector. Therefore, I had to buy a USB-Micro-USB adapter.

When a mouse was connected, the tablet system automatically detected it, and an arrow-shaped mouse cursor appeared on the screen. Diagnostics showed that the tablet’s electronics are in good condition. Therefore, to repair the tablet, it is enough to replace the touchscreen with your own hands. After diagnostics, the tablet was turned off using the mouse.

While waiting to purchase a touchscreen, it is necessary to keep the tablet's battery charged, since deep discharge sharply reduces the tablet's battery life.

Where can I buy a touchscreen for a tablet?

The search for a store to purchase a touchscreen for a children's tablet MonsterPad at a minimal cost led to the website of the time-tested Chinese online store AliExpress. The site presented a large assortment of sellers of touchscreens for the MonsterPad tablet.

A seller with a large number of positive reviews and a high rating with an average price and free shipping was selected. When choosing a touchscreen, pay attention to the presence of double-sided tape on it. If the screen is without adhesive tape, then replacing it will be complicated by the need to purchase such adhesive tape, cut it and secure it.

If you can’t find a touchscreen by the name of the tablet, you can try searching by its markings, which are usually applied to the flat cable running from the touchscreen.

The touchscreens of many tablet models are interchangeable. The main thing when choosing is to pay attention to the type of sensor and its diagonal size, expressed in inches. For example, the MonsterPad requires a 7" touchscreen.

The resulting parcel was a large, compared to the size of the touchscreen, polystyrene box completely wrapped in adhesive film. It is convenient to open such packaging by cutting the film with a knife along the line of connection of the box halves.

The touchscreen was removed from the packaging and carefully inspected for defects. Everything was in perfect condition. Trying on the glass on the tablet confirmed the size matches. To check its functionality, all that remains is to disassemble the tablet and connect the touchscreen to the motherboard.

How to disassemble the MonsterPad children's tablet

Before starting to repair the tablet, to avoid scratches on its case and display and dust getting between the display and touch glass, you need to wipe the table with a damp cloth and cover its surface with a soft, lint-free cloth. The only tools you need are a knife and a couple of small screwdrivers with a Phillips and a flat blade. After preparing the workplace, you can begin repairs.

The MonsterPad children's tablet can be disassembled easily thanks to the screw fastening of the back cover. Using a sharp tool, remove the four plug legs glued with adhesive and unscrew the four screws using a Phillips screwdriver.

Next, even without the help of a plastic card, grab the case halves with your nails in the area where the tablet's power button and connectors are installed, and carefully move the halves apart. The power and volume buttons must be immediately removed and set aside so that they do not get lost or scratch the tablet screen if they fall under it.

The tablet has been disassembled sufficiently to begin replacing the touch glass. All that remains is to remove the cable coming from the touchscreen from the connector. In the photo the connector is in the far right corner.

If the tablet was disassembled to replace the battery, then its type is clearly visible in the photo. To replace the battery, you first need to unsolder the red and black wires coming from it from the motherboard and carefully remove it, overcoming the adhesion force of the double-sided tape.

To release the touchscreen cable, you need to use a screwdriver blade to move the clamps a couple of millimeters in the direction indicated by the red arrows in the photo. After this, the cable can be removed from the connector without force.

How to check the touchscreen before installing it in a tablet

After removing the back cover from the tablet, it became possible to test the new touchscreen for functionality. To do this, without removing the protective film, you need to place a new touch screen on the broken one, carefully turn the tablet over, and observing the numbering of the cable, insert it into the connector on the motherboard and return the latches to their place. Then turn the tablet over with the display facing up and turn it on using the power button.

After downloading the software, you need to tap on any icon or just work a little on the tablet. If there is a reaction on the display when touching and scrolling through pages, then everything is in order and you can start replacing the broken glass. Before starting the repair, you must turn off the tablet with the power button and disconnect the cable of the new touchscreen from the connector.

How to remove a cracked touchscreen

To remove a cracked touchscreen, use the end of a knife to pry it at any of the corners and try to lift it up.

In the MonsterPad tablet, the glass was glued weakly; there was no need to even heat the glued area with a hairdryer. The force of the fingers was enough to peel it off. The main thing is not to rush and perform this operation very slowly and smoothly.

Preparing the tablet frame and installing the touchscreen

After removing the cracked touchscreen, use a rag soaked in alcohol to degrease and remove any remaining adhesive from the frame.

Fortunately, the cracked glass did not crumble into pieces and there was no need to use a vacuum cleaner or hair dryer to blow off the small fragments. For the same reason, it is not recommended to scrape off glue residue with a tool.

To ensure that the cable did not interfere with the positioning of the touchscreen when gluing, a piece of polyvinyl chloride tube was inserted next to its release hole, as in the photo.

In the next step, the protective film was removed from the touchscreen from the applied adhesive layer to the edges.

All that remains is to tuck the cable into the hole in the tablet frame, rest the corner of the touchscreen near the cable into the notch of the frame and slowly attach it to the frame, controlling the accuracy of the placement in the opposite corner diagonally.

The touchscreen fit into the recess of the frame exactly, without gaps or displacement on the first try. There is no need to press the glass tightly at this stage of repair. It is advisable to do this after fully assembling and checking the operation of the tablet.

The cable is long enough, which is convenient for installation. However, to prevent the cable from breaking if it gets caught between the covers when they are closed, it must be folded in half and pressed a little, avoiding sharp bends.

All that remains is to install the pushers of the buttons for turning on the tablet and adjusting the sound volume and snap the back cover to the base of the tablet. Screw in the four self-tapping screws and install the removed plugs on them.

The independent repair of the tablet was successfully completed, it began to work and look like new, and the child can play his favorite games again. Now, I believe, he will be more careful with his tablet and other gadgets. I did not remove the protective outer film from the touch screen; let the owner of the tablet remove it and be the first to tap (touch) the surface of the screen.

I hope that the step-by-step instructions provided will help any home craftsman, even those who do not have experience in repairing such devices, cope with the repair of a tablet or smartphone.

The cost of replacing the tablet's touch glass with your own hands was less than 10% of the original cost of the tablet.

The glass on a mobile phone is one of the most fragile elements. If a mobile device falls on asphalt or rubble, the screen will break in most cases. And even the use of durable types by manufacturers does not help - the displays still break. In this case, you have to buy a new one and also spend money on replacing the glass on your smartphone. However, you can try to carry out this operation yourself.

Theory

Before you start manipulating the software on your smartphone, you need to know what you have to deal with. The main elements here will be:

1. Matrix, which is a liquid crystal panel. It is on this that the image you see is formed. In some phones, the matrix is ​​located under protective glass, while in other models these two elements are one. The matrix is ​​connected to the main board of the smartphone through special cables.
2. Touchscreen. This is a glass panel that breaks when the smartphone is dropped. This is what will have to be changed. If the touchscreen and matrix are one solid element, then if the touchscreen breaks down, the matrix will also have to be replaced. It is expensive.
3. Frame and buttons.
4. Backlight.
5. Loops.

Procedure for replacing glass on a smartphone

When dropped, the touchscreen is always the first to suffer, and then the matrix may also break. In any case, the replacement order will look like this:

1. Disassembling a smartphone.
2. Removing the main module from the housing.
3. Warming up the screen.
4. Separation of the touchscreen from the main module. Sometimes it is removed along with the matrix.
5. Cleaning from glue residues and dust.
6. Applying glue for installing a new touch glass. Irradiation with a lamp for quick drying.
7. Housing assembly.

Instructions

If your phone's matrix and touchscreen are different elements, separate from each other, then you can handle this simple procedure yourself. This will help save money, because the price of replacing the glass on a smartphone can cost 1000 rubles, and it only takes 10 minutes.

For work we will need:

1. Shaped screwdrivers.
2. Hairdryer Preferably an assembly one.
3. Scotch tape or glue.
4. Mediator.
5. Gloves.
6. A plastic card.
7. Spatula.

Some of these accessories come with your new screen.

You need to start with the bolts. Unscrew the bolts using a small shaped screwdriver. Most often, a torx screwdriver is required. Place all the bolts in one place so as not to lose them. A regular matchbox is ideal. Many models have a hidden bolt on the upper left side of the smartphone. It also needs to be unscrewed.

Now we take a pick and with its help we try to remove the smartphone case around the perimeter. This tool is ideal for this purpose. Many people try to remove the cover with a screwdriver, but it leaves small dents on the sides, which are immediately visible and even felt when you pick up the phone. Therefore, a pick is an ideal tool for removing a smartphone case.

Pay attention to the side latches. They need to be pressed a little to remove the housing. These latches are fragile and break easily, so be careful when doing so. If you break any of them, the case will not fit as tightly as before.

Now you need to remove the buttons that are on the sides. Take tweezers and carefully remove them without touching any cables. If there is a top on/off button for the smartphone, then it also needs to be removed.

After dismantling the buttons, we move the main board, but we do it very carefully, because under it there is a cable to the touchscreen. You need to disconnect it and connect the cable of the new touch glass. This is necessary to check functionality. After connecting the cable, turn on the smartphone and swipe your finger over the new touchscreen. If it works, then you can begin to completely remove the previous glass.

We remove the old glass and glue the new one

To remove the glass with a hairdryer, you need to warm up the areas where it is attached to the case (usually the touchscreen is attached to the front of the case). Warming up is done at a temperature of 70 degrees for 5-10 minutes. During this time, the mounting adhesive will melt and the touchscreen will easily come off. You can then attach the new sensor to the main part of the phone. At this stage there are 2 options:

1. Remove any remaining old glue. Glue double-sided tape instead and attach the new sensor to it. Note that this is the correct method, but it is more labor-intensive, because you need to remove the old glue, and this is quite difficult.
2. Replace the protective glass on your smartphone using old glue. This can also be done, and the adhesion of the new sensor to the glue will be strong. But first you need to warm up the old glue with a hairdryer after you have torn off the old touchscreen.

Did you glue new glass? Now you need to insert the cable from the sensor into the connector where the cable from the old glass was connected. Then you need to reassemble the phone in the reverse order.

How much does it cost to replace glass on a smartphone?

If you go to workshops, you will have to pay for the screen and the work of the master, which, depending on the workshop and region, can be estimated at 500-1000 rubles. By replacing the glass yourself, you can save money. In this case, it is better to order the sensor through a well-known Chinese website, which will save even more.

If you change the display in the cabin on a new smartphone, the replacement will be very expensive and often amounts to 50% of the cost of the phone itself, and sometimes even more. Therefore, if you have the skills to replace displays and sensors, then sometimes it pays to do it all yourself, even if it takes much more time than in a workshop.

In cases where the sensor and matrix of a smartphone are one unit, replacement will also be expensive, because the matrix itself is an expensive element, and the price of the sensor is cheap. Of course, the image on such displays looks high-quality, but if the glass falls and gets damaged, repairs cost a lot of money.

Conclusion

Replacing the glass on a smartphone with your own hands is a simple task that requires experience, nothing more. If you want to learn how to do this, then practice first on an old smartphone that you don’t mind ruining. After one or two procedures, you will learn and can easily make the replacement yourself. True, different models may have their own subtleties, but you will figure it out.