How to replace glass on iPhone yourself
After this operation, if you had high-quality glass and glue, the display is not badly damaged (there are cases when the display visually looks like new, but after a fall, micro-damage appeared on it), and you did everything correctly and dried it. then in the near future if your phone is not heavily exposed to the sun or the phone is not in a relatively high or low temperature (otherwise the glue will flow). you can use it as after installing a new display.
Stock! Display replacement for Apple iPhone 6. only 1200 750 UAH !
i7phone Articles Replace the glass separately on the iPhone if the touchscreen works. Worth it or not?
Replace the glass separately on the iPhone if the touchscreen works. Worth it or not?
In such a situation, it is quite easy to understand customers. The speed of updating the model range, as well as saturating the market with the widest list of various services and individual parts, becomes so high that even professionals begin to get confused, and not that people who are not tempted by the abundance of information about the Apple iPhone and those who are trying to imitate it. It must be said that such a question became popular in the era of the emergence of capacitive, i.e. glass sensors. When users knew only resistive (soft, plastic) touchscreens, this question did not arise, because such a sensor practically does not beat. He simply refuses or stops responding adequately. in this situation there was no other way out how to change him.
In simple terms, first of all, you need to pay attention to the fact that sensors are divided into two types. They differ in how they work. “Does it matter?”. you ask. If you are asking a question about whether it is possible to replace the glass separately from the touchscreen, then knowledge, and most importantly, understanding of this issue is very important.
So, the first type of sensor, resistive, only creates the illusion that it listens to your touches, in fact, it responds to pressing. That is why the resistive touchscreen does not care what you press on it, with your finger, stylus, pencil. in the place where you pressed, the layers were closed and if the touchscreen is working properly, then the correct reaction to the “touch” is. This is how it works. Needless to say, there can be no question of separating the touchscreen layers from each other? The second type of touchscreen, capacitive, has a completely different operating principle. It is not multi-layered! This is glass. This glass is coated with a layer of resistive material. An alternating voltage is applied to this layer, and since you and your finger are capable of conducting an electric current, when you touch the touchscreen, a leak occurs, the place of which is fixed by the controllers. This touchscreen responds to the touch of your finger. He is completely indifferent to styluses, etc.
Glass with or without a sensor layer remains glass. And glass, as you know, breaks. But the resistive coating does not disappear anywhere, it remains on the broken glass and continues to perform its function. This is the secret of a broken but still working touchscreen. Even a very badly broken glass touchscreen can continue to work.
To replace glass on an iPhone (after the iPhone 3gs version, where the manufacturer provided for the possibility of replacing glass separately from the display), the following algorithm is used:
Is it worth or not to change the glass on the iPhone separately?
Remember, self-repair of the iPhone does not guarantee its further trouble-free operation.!
First of all, it is you who decide whether or not to Replace the glass separately on the iPhone, but If you do not have much experience or desire to change the screen on the iPhone on your own.
IPhone 7 glass replacement at home
Despite the fact that the new Apple flagships, starting in 2016, have become dust and water resistant, this did not save them from other mechanical damage. And understandably, the top 10 is topped by broken display glass. As an evil, the weighty iPhone with acceleration falls exactly on the fragile display, and not on the durable metal “back”. No matter how strong and hardened the glass is, it cannot tolerate close contact with asphalt (concrete). And a line of frustrated users goes to the workshops, whose devices have lost in the battle of technology against Earth’s gravity.
The vagaries of iPhone repair
In principle, Apple’s basic policy is focused on the fact that it is better to replace, rather than repair in the field, a damaged gadget.
Anyone who addresses the problem of a broken screen will first of all be offered the opportunity to replace the broken iPhone with a new one. with an additional charge. Instead of a broken one, you get a factory tested gadget that meets high quality standards, with a full cycle of a one-year warranty.
Please note that in the event of any intervention (not by authorized center employees). during the warranty period, you automatically lose the ability to replace the iPhone with a new one (with a surcharge). This is the main condition of this program.
Therefore, even a broken smartphone should not be opened. He will then be sent to the manufacturer. to perform professional repairs and complete restoration of all settings, in accordance with the standards of the enterprise.
What do you get when you contact a third-party service center? In the best case. a couple of months. for a second call for free, with an unpredictable result. And all this for about the same money as when exchanging with a surcharge, plus you can forget about the manufacturer’s warranty.
In general, replacing the broken glass of the screen is a very scrupulous business. Often, service centers offer to change the entire screen module at once. And with the right “donors”, you know, it’s still stressful. smartphones are new. A large number of original spare parts (or their counterfeit equivalents) should appear only by the end of January-February 2017. And they will cost 20-30 thousand rubles.
But how then to be? Do not pay almost half the cost of a gadget to replace the display. And besides, it is not known how successful the replacement procedure will be. Nobody guarantees you the same high performance as the working original.
And again, damage to damage is different. If the “seven” has a crack on the display, just temporarily close it by sticking any protective film, it will protect from further depressurization and simultaneously strengthen weak points.
In cases where the screen is cracked in many places after the fall, but continues to work, the touch “Home” responds adequately to commands. it makes sense to try to replace only the glass. We recommend not to postpone the trip to the workshop, as microscopic debris can damage the matrix. And then you will have to change it, and this will definitely cost a pretty penny.
The main problem here is that it is very difficult to remove the glass and reattach it, avoiding the appearance of uneven adhesion of it to the screen. Even professionals don’t always get it right. In this regard, we strongly recommend not to engage in amateur performances, but to contact verified offices.
Also, to carry out such work, you will need special glue and a whole list of additional devices and materials, which are impractical to purchase for the sake of a one-time procedure. So you shouldn’t experiment, like “it won’t work,” on such an expensive device as the iPhone.
And it’s better not to save money, and replace the entire display module in the assembly. You can easily cope with this procedure yourself. That’s just for now, the problem is to find a spare part as close as possible to the original. If you are lucky enough to get a new display module, you can try to dismantle the old one, and reassemble the smartphone as “Lego”. How to do it. see further.
Algorithm for self-replacement screen iPhone 7
If this does not scare you, and, most importantly, you managed to find a suitable donor (or a new spare part), you can try to install it yourself. There is nothing extra-complicated about it.
Disassembling the sealed iPhone 7 is a little more difficult than its predecessors. his joints are glued with a special insulating compound. To facilitate the process, we recommend that you warm them up a little with a hair dryer to soften the glue joints. Next, you need to unscrew the two bolts near the only lightning port with a special star screwdriver.
Walk around the perimeter of the joint under the top of the screen with any suitable object (a plastic spatula, for example), starting at the area near the port. This will allow you to peel off and detach the side latches, then gently pry up and slowly begin to detach the top of the screen from the case. Do not make sudden movements. this can damage the latches and thin connecting cables that power the display.
We draw your attention to the fact that new iPhones open like a book. Therefore, when disconnecting, you need to move from the port. and along the left edge (on the side opposite to the camera window).
Now our task is to unscrew a lot of bolts on the strips that protect the loops. We remove them in the places marked with arrows and unfasten the trains with a spatula. To avoid a short circuit, it is imperative to de-energize the system by disconnecting the loop coming from the battery! Then detach the cable leading to the camera and speaker. After that, you can completely remove the top of the screen. Now it’s time to mount a new replacement module. in the photo it is on the left. We need to transfer the camera, the top speaker and the “Home” button from the native device to it.
Carefully remove the tape securing the connecting wires and the bright protective film from it, then remove the speaker and camera module from the home part of the screen (on the right in the photo). To do this, unscrew the screws marked in the photo below, and, pushing the camera cable away, take out the ear speaker, then carefully disconnect the rest of the camera cables and pull it out. This is what should happen. Now it’s time to dismantle the home button “Home” from the broken display module. Again, we unscrew the screws at the marked points, disconnect the cables and take out our unique button (it will fall out by itself. in the direction opposite to you). The cover plate can be removed from the broken display. Unscrew the screws again at the points indicated in the photo. Unfasten the connecting cables and remove the cover. Now you need to rearrange “Home” on the new display module. Turn it over and reinsert the Home button, pushing the factory protective film off the screen. Connect the cables to it and reassemble all the parts in the reverse order. We remind the sequence of installing the camera module and speaker. First, the camera is inserted into the opening, then the speaker (with the golden side up), and then the contacts are connected. Finally, rearrange the metal protective bar, connect the screen cable. Do not forget to screw in all the screws! In fact, this is not an easy task. after all, they are all different sizes. In order not to lose and not get confused, it is better to lay them out on a sheet of paper, along the way making notes where they are from.
Do not use too much force when screwing them back in, as excessive pressure will apply pressure and may damage the board components or the screen itself.
That’s it, our screen unit is assembled and ready for final installation. After inserting the side latches into the grooves, fasten the cables back, the last will be the power cable. At this stage, you need to check the functionality of the installed module. Press the power button and check that the start-up proceeds normally. Examine the screen for dead pixels or blackouts. Check whether the Home button responds correctly to pressing the button, whether the application lists are scrolling in the menu, whether the camera starts, test the sound. If everything is fine, turn off the device and continue assembling. We fasten the protective pads to the points where the cables are connected. first the ones above the power supply, then the ones near the camera, then put the halves of the smartphone together, starting to snap them. Control the pressure, you should not press hard. It remains to screw in two pentalobe screws and be done. It is clear that after the procedure, your device will lose its tightness. But with a strong desire, it can be restored, many centers already offer such services.
Комментарии и мнения владельцев (1)
If you google “iPhone 7 glass replacement in Kiev”, then the nightmare of many smartphone owners has become a reality for you. Of course, at first you simply refuse to believe what happened! But time cannot be returned, it is pointless to hope for a miracle. It is necessary to quickly eliminate the defect by re-gluing the glass.
Of course, over time you get used to the cracked glass of the display, and you are glad that only aesthetics have suffered. However, if you really care about your smartphone and do not want to increase the cost of repairs at times, do not get used to cracks, but immediately take the gadget to the workshop. If you ignore the problem and continue using the device, other troubles may arise, for example:
- incorrect display operation;
- the appearance of spots on the screen or “dead zones”;
- reduced sensor sensitivity;
- uncontrolled pressing on the sensor;
- other breakdowns of the smartphone and the need for modular repair.
For the same reasons, it is strongly discouraged to carry out plywood without the necessary skills and tools. Even a high-quality YouTube video guide does not guarantee the correct result.
Unfortunately, it is not always possible to simply change the glass. the top layer, which is glued to the display, and under which there are capacitive sensors, a tactile response. Replacement of the screen module is required if the matrix is damaged. Symptoms of such a problem are a poorly functioning sensor, including the appearance of spots of any color on the screen.
To prevent cracks on the screen, use protective glass and handle your device with care. According to the statistics of our service, the most common cause of damage is falling from a height. But strong pressure, tangential blows and chewing (by animals or children) also lead to the problem.
FIX4U is a workshop that specializes in servicing various Apple equipment, including we inexpensively repair broken glass front, back glass and camera glass. And if it so happens that you need to repair the glass of the iPhone 7, then you are sure to contact us!
iPhone 7 glass replacement
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Where can you change the glass on iPhone 7
In our workshop, iPhone 7 glass replacement is performed by professionals with a guaranteed result. We are often found thanks to our customers’ Комментарии и мнения владельцев on Google Maps, which highlight the main benefits:
- qualified craftsmen with work experience;
- the ability to quickly diagnose and eliminate other malfunctions if necessary;
- democratic cost of services and an honest price list. How much does it cost to replace the iPhone 7 glass, you can find out by phone, the price is also indicated on the website;
- the office is located in the center of the capital, we work according to a convenient schedule;
- we provide a guarantee for the work performed;
- the possibility of making a replacement in your presence. And vice versa, if the client wishes, the repaired gadget will be delivered by taxi;
- at the choice of the client, during the repair we can use original or high quality glass. (Note that the original is now discounted).
FIX4U is a workshop you can trust! We will be happy to help you by taking care of your smartphone. If you have any questions, click “free consultation”, and our manager will call you back shortly.
From the very first day we have been working according to a fixed price list published on the website. This is our principled position.
How strong are the glasses we put on the iPhone 7?
It is impossible to measure the strength of glass in a service center. What is known for sure: the glass that we install belongs to the same type of chemically hardened glass as the original, most likely it differs slightly in strength.
Not only renovation
And also an upgrade and other maintenance. We share knowledge and provide assistance in working with the software completely free of charge.
A guarantee you can count on! We do not look for reasons to refuse service and carry out warranty repairs as quickly as the main one.
Looks like this is the place for a special offer!
Our special offer is valid today, tomorrow and every day!
Nothing special, we just do exactly what we promised, and for exactly as much as it is written on the site.
Warranty service first!
All small services with us are completely free, come!
Replacing glass and display on iPhone 7 and iPhone 7 Plus
Despite the increased strength of the glass, the iPhone 7 still shatters quite often. Today we offer two repair options: replacing the glass separately and replacing the display assembly (remanufactured original). If only the glass is broken and the display is working properly, it makes sense to replace only the glass. If, in addition to cracks on the glass, there is damage to the display (dark or colored spots, the image is damaged), then the complete part will have to be replaced.
iPhone 7 Replacing glass separately from the display. 4,990 ₽ Replacing the display assembly. 8,490 ₽ (original remanufactured)
iPhone 7 Plus Replacing the glass separately from the display. 5,990 ₽ Replacing the display assembly. 10,990 ₽ (original rebuild)
Both jobs are completed within 30 minutes. Glass replacement is performed on your display after the replacement part has been delivered to you.
How much does it cost to replace glass on an iPhone?
Once we checked with MacPlus, then the are given exclusively for them. To understand the difference, we give the for glass replacement and for the entire module as a whole.
iPhone 6: from 1500 rbl. glass or from 4000 rubles. whole module
iPhone 6 Plus: from 2000 rbl. glass or from 5000 rubles. whole module
iPhone 6s: from 2500 rbl. glass or from 5000 rubles. whole module
iPhone 6s Plus: from 2800 rbl. glass or from 6000 rubles. whole module
iPhone 7 Screen Replacement shown in 5 minutes
iPhone 7: from 3200 rbl. glass or from 6500 rubles. whole module
iPhone 7 Plus: from 3500 rbl. glass or from 8000 rubles. whole module
iPhone 8: from 4000 rbl. glass or from 11,000 rubles. whole module
iPhone 8 Plus: from 4500 rbl. glass or from 12,000 rubles. whole module
iPhone X: from 12000 rbl. glass or from 25,500 rubles. whole module
iPhone XS: from 14000 rbl. glass or from 28,000 rubles. whole module
iPhone XS Max: from 17000 rbl. glass or from 33,500 rubles. whole module
iPhone XR: from 9500 rbl. glass or from 21,000 rubles. whole module
It is clear that replacing the entire module will always be preferable to replacing the glass. But the difference in price is always in favor of “minor” repair of the module.
Compare: from 12,000 rubles. for replacing glass on the iPhone X against 25,500 rubles for the entire display module. It turns out a saving of about 10 thousand rubles.
How to professionally replace only glass in an iPhone?
The blue area in the center of the photo is a separator that heats the display module to remove glass. Costs 20 thousand rubles.
The device is carefully and unhurriedly opened, the loops are sequentially disconnected. This is a very important stage that requires attention and accuracy. Excessive movement or incorrect parsing sequence can damage the electronics.
The old damaged glass is removed from the heated display module with a molybdenum thread, the glue is removed and, if the polarizing film is damaged, remove it and stick a new one.
This is also very important and requires care: abrupt movement can damage the display.
If you do not remove the glue completely, there will be irregularities and bubbles during the plywood. And the accurate removal of the polarizer requires a special device.
In the foreground is an autoclave and a vacuum press for high-quality gluing of displays with two compartments. The upper compartment is a vacuum press designed for gluing displays with glass. The lower one is an autoclave, used to remove residual bubbles under the press using excess pressure. Costs 90 thousand rubles.
The new glass and display are sent under a press for a high-quality connection, and then into a pressure chamber so that no air bubbles remain.
Both steps are necessary, as if you use only one, bubbles and bumps will remain.
Fast and high-quality glass replacement requires new high-precision equipment and experienced craftsmen. not only those who know how to work on it, but also thoroughly know the structure of the iPhone.
It looks like the front glass with a touchscreen for the iPhone X.
By the way, replacing the glass on the iPhone X requires more care and attention when disconnecting the cables (you can damage the display) than working with the iPhone 6, 7 and 8.
The metal frames on the iPhone X need to be filed away (with plastic frames, this is not necessary). In service MacPlus this is done by a separate technician who is not distracted by other types of repairs, which allows you to change glass on the iPhone faster.
How to replace glass on an iPhone and leave the display intact
Guess the most common question asked by owners of broken iPhones.
Right. Can i replace cracked glass on an iPhone while leaving the display intact? They say it’s cheaper.
And there can be two answers. At home. no, not in any case. This venture is doomed to complete failure.
In terms of good service, yes, you can. To understand what the complexities of the process are, we contacted the well-known Russian service MacPlus. specializing in post-warranty repair of Apple technology.
At the same time, we received from them pictures of the equipment on which this procedure is carried out.
Why replacing only glass on an iPhone is so difficult?
Because the glass is literally fused with the display matrix.
From time immemorial, the iPhone screen module consists of three parts: glass, a touch panel and a matrix. the part on which the picture is displayed.
Until 2010, a thin layer of air remained between the glass with the touch panel and the matrix. Accordingly, replacing broken glass was relatively easy and inexpensive.
The iPhone display module is a one-piece replacement. You can’t just remove the glass.
Starting with the iPhone 4, Apple tightly connects all three parts of the display module to each other. There is no more air gap. This was done with good intentions: the image from the matrix is now as if displayed directly on the surface of the glass, and dust does not get there.
But the repair of this part has become much more complicated since then. If the glass is damaged, it is better to replace the entire display module as a whole. Removing and replacing the glass is extremely problematic: it is firmly adhered to the matrix, which is incredibly easy to damage.
Glass for iPhone XS fits into the frame.
To properly replace glass on modern iPhones, you need:
▪ carefully remove the broken glass without damaging the matrix
▪ remove all glass “dust” from the matrix, frame and body depressions
▪ using special equipment to “stick” the new glass perfectly evenly, without air interlayers.
If the first two points can be dealt with in “handicraft” conditions, then it is almost impossible to repeat the last one at home. The equipment itself is also not easy to get: it costs serious money and requires skill.
This is why replacing glass on an iPhone is a relatively rare procedure that cannot be trusted by just anyone.
However, it still costs less than just replacing the entire display module. The main thing is to go to the SC, which has the necessary hardware and is well-versed in the matter.
P.S. What does the iPhone look like after glass replacement? There are disadvantages?
It was / is.
If the procedure is performed correctly, then the difference between such an iPhone and a device with a new module is invisible to the naked eye and when used in general.
In case of “handicraft” repair of the module, however, it will be much worse. Detachment of glass from the frame, the appearance of air bubbles, remnants of glass dust, violation of the tightness of the display, stains and light on the matrix from the uneven distribution of new glass. only some of the problems.
The result is a compromise. IPhone glass replacement is almost always significantly cheaper, but it cannot be done anywhere. Choose a service that uses professional equipment and vouches for the result.
It was / is.
By the way, the glass replacement has an interesting plus regarding iPhone models with Face ID. iPhone X, XS, XS Max and XR. You will continue to have True Tone and Face ID. In case of replacement of the entire module, no such guarantees.
IPhone 7 repair in Kiev
The new iPhone comes in six colors: Gold, Silver, Rose Gold, Matte Black, Gloss Black, and Red.
The presence of 3D Touch technology facilitates the execution of actions with a minimum number of clicks. 7 megapixel camera with advanced Quad Full HD technology captures high definition video even in low light.
The powerful A10 processor allows you to launch applications even faster, and thanks to the improved autonomy, the smartphone can last significantly longer on a single charge.
iPhone 7 has a convenient and functional 4.7-inch screen and is capable of capturing high-quality video in both slow motion and fast motion. The device lacks a 3.5mm jack, now the headphones are equipped with a Lightning connector.
The device has a sturdy metal case and a high-quality IPS display. But all these advantages cease to please in the event of serious damage to the device.
SC iFix has extensive practical experience in the field of professional Apple repair. Urgent replacement of broken glass, installation of a new battery, express cleaning after water ingress, replacement of the charging connector. this is a small list of services that we provide in the workshop in your presence.
Replacing the battery
May be required when reaching 500-700 charge cycles. Portable and car chargers significantly accelerate wear and tear. It is also undesirable to use charging power supplies with a nominal value higher than 1A. The reference is to use the complete unit and USB-cable. If, nevertheless, the battery began to quickly lose charge, turn off at low ambient temperatures or heats up significantly, then it’s time to contact the nearest iFix department for competent diagnostics and repair. I would also like to note that a fast discharge is not always associated with a “planted” battery, but may be the cause of consumption created by the U2 charge controller microcircuit or a consequence of moisture ingress.
Cleaning / prophylaxis after liquid spills
iPhone of the seventh model, like previous generations, is no less susceptible to flooding and failure. The manufacturer claims that the device has a waterproof rating that complies with the IP67 index. In practice, the number of calls to the iFix network from the iPhone 7 after water ingress has not decreased. Do not forget that Apple does not cover heated devices with a warranty.
If, nevertheless, a trouble happened to you and the smartphone was flooded, we recommend that you do not try to fix the problem yourself: dry it with a hairdryer, on a battery, or try to connect it to a charger. This will significantly reduce the likelihood of a successful repair and will guaranteed to increase the cost of repairs. Try to contact the nearest branch of the iFix SC. We immediately open heated devices on the spot and perform urgent cleaning.
What to change, glass or display?
We often hear a question from customers with a broken display module on iPhone 7: “Why change the entire screen if only glass is broken and everything works?”.
Display “seven” is a single piece, which consists of glass, sensor, front polarizing layer, matrix, rear polarizing layer, backlight and frame. All these components are glued and soldered at the factory, which makes glass plywood difficult without an experienced engineer and professional equipment: a pressure chamber, a separator, a laminator, a dust-free room and high-quality consumables.
The most important link, of course, is the engineer, whose experience reduces to zero the risks associated with the repair of the device and the further operation of the gadget. IFix SC provides an extended warranty for a period of 6 months for this service. Replacing glass on iPhone is the most demanded service and can significantly reduce the cost of repairs without losing quality. All branches of the iFix network are equipped with the necessary equipment and spare parts for urgent repairs.
Benefits of contacting iFix SC
iFix has been operating since 2013 and has 12 branches in Kiev. We work seven days a week and specialize in urgent repairs for iPhones and the entire Apple line. For residents of other cities and regions, it is possible to send the device by courier delivery service “New Mail”.
The iFix team is confident in the quality of their work, so we provide a guarantee from 3 to 12 months.
We love apple technology, so you can be sure that your gadget will be refurbished at the highest level in iFix.
IPhone 7 Repair
|Diagnostics External examination of the device, determination of possible causes of malfunction.||Is free||10 min.|
|Glass replacement (original LCD is preserved) Chipped and cracked glass, display and touchscreen work.||700 UAH.||1 hour|
|Display replacement (original) Color stripes appear, touchscreen does not work.||1450 UAH.||15 minutes.|
|Display replacement (high quality copy) Colored stripes appear, the touchscreen does not work.||800 UAH.||15 minutes.|
|Full diagnostics Internal inspection of the device, identification of possible causes of malfunction using special equipment.|
In rare cases, it can take up to several days, for example, after a short circuit on the board or after moisture has entered
The price depends on the degree of damage to the device by moisture.
The price depends on the complexity of the work in each specific case.
Network, Wi-Fi, or Bluetooth not working on iPhone 7
It happens that the iPhone does not respond to the SIM card, giving “Search”. If the problem is not in the SIM card, then the communication modem is faulty. The repair includes the replacement of a non-working microcircuit on the motherboard using the exact desoldering method.
When Wi-Fi does not work correctly, you need to look for the reason in the Wi-Fi module. For this we offer comprehensive diagnostics.
When troubleshooting Bluetooth problems, you need to start by properly flashing your iPhone 7. If it doesn’t solve the problem, you need to replace the faulty antenna or chip. We will help you determine the exact cause of the breakdown and fix the phone.
Frequent breakdowns of iPhone 7 and features of their repair
IPhone 7 Repair includes free diagnostics and quality fixes. Our service center provides a full range of services, repairing all possible breakdowns.
Replacing glass and display on iPhone 7
Perhaps one of the most common problems today. It is enough to miss the phone. cracks, broken pixels or colored stripes appear on the screen.
Replacing the iPhone 7 glass is done if you see cracks, but the display and touchscreen are working properly. With the help of special equipment, we remove the remnants of broken glass and glue a new one, adhering to the factory technology.
If the image is deformed and the touchscreen does not work. need a replacement display. To do this, we use the original screen from donor phones or a high-quality copy at your request.
IPhone 7 Battery Replacement
Battery problems can occur if:
using substandard, non-original or car chargers;
If the phone runs out of power quickly, it turns off at 25-30% of the battery capacity. this is the first reason. You can fix the problem by replacing the battery with a new one.
In the case when the phone does not turn on without being connected to the network, it heats up during charging or does not connect to the charger. this is the second reason. This problem is solved by unsoldering the power controller chip on the motherboard. Our service center has the necessary equipment and professionals to help you troubleshoot.
iPhone 7 Screen Replacement Glass Only Repair. DIY 15 min tutorial