Smartphone Xiaomi Redmi Note 4X deservedly considered one of the most reliable models of the budget segment, but even its durable metal body does not always save from falling on asflate. Broken glass or the appearance of black spots on the matrix are common problems that owners of the device face after several years of active use. Independent replacement of the screen on Xiaomi Redmi Note 4X allows you to save a significant amount, if you compare the cost of components with prices in service centers.
The process of restoring the display requires not only accuracy, but also a minimum set of tools, as well as understanding the internal structure of the gadget. Unlike many modern devices with adhesive frames, the design of the “four” is quite friendly to home repair, since the screen here is mounted mainly on screws. However, the rush can lead to damage to the plumes or leakage of the case, so it is important to prepare for the procedure in advance.
Before you start disassembling, you need to make sure that the other components are working properly, so that you don't change the working part by mistake. If the image on the display is distorted, but the sensor is working, or the touch screen does not respond when the whole picture is a direct signal to replace the module. Below we will discuss in detail the steps of dismantling and installing a new spare part.
The quality of the repair depends on how well you prepared for the process. To work, you will need not only a new display module, but also a specialized tool that will avoid scratches on the body and damage to electronics. You should not try to replace the screen on the knee or using kitchen knives, since the risk of damage to the plumes in this case increases many times.
Particular attention should be paid to the organization of lighting and cleanliness of the surface. fine dust caught under the glass will be very annoying during use, and poor light can cause you to not notice a microscopic screw or damage to the insulation. The Redmi Note 4X repair toolkit is standard for most Xiaomi smartphones of the period.
- 🔧 Screwdrivers: Phillips cross #00 and #000, and a flat screwdriver for snapping plumes.
- 🧤 Plastic blades (spoogers) and a mediator for neat opening of the body without scratches.
- 🌡️ A hair dryer or heating platform to soften the glue (if the frame is glued) or heat the glue residues.
- 🧴 Degreasing agent (alcohol or isopropyl alcohol) and glue B-7000 frame-fix.
- 🧲 Magnetic mat or organizer for sorting screws of different sizes.
⚠️ Warning: Before starting any work, be sure to turn off the smartphone. Attempting to disconnect the display plume under voltage can lead to the combustion of the power controller on the motherboard.
Make sure you have a light source on hand that can be directed inside the enclosure, as some screws may be hidden under decorative elements or stubs. SIM-card and memory card before disassembly, so as not to damage their slots during dismantling.
Dismantling of the back cover and battery
The first step in any Xiaomi Redmi Note 4X repair is to remove the metal back cover. Unlike glass models, here the lid is held on two screws and plastic latches around the perimeter. This is one of the easiest steps, but it requires caution not to bend the metal and break the plastic.
Start by unscrewing the two screws at the bottom of the back panel. They can be hidden under stickers or be the same color as the body, so carefully inspect the bottom of the device. After removing the screws, you need to split the lid using a plastic shoulder blade or suction cup.
Put the blade in the junction between the frame and the cover in the area of the bottom speaker or charging connector. Carefully drive the tool along the perimeter, snapping the locks. Do not put excessive effort if the lid does not respond, check if all screws are twisted. Once all latches are released, the lid will easily be removed.
What to do if the cover is deformed?
If the body of the smartphone is severely damaged in the fall and has dents, the new cover may not fit tightly. In such cases, it is recommended to first carefully straighten the metal using pliers with soft sponges, or replace the frame of the body entirely.> When you remove the lid, you'll see the inside of the smartphone, and the first thing you need to do is turn off the battery to turn off the device, and the battery plume is connected to the board with a wide connector that needs to be gently bent with a plastic blade. Turning off the battery is a critical step for the motherboard's safety, and then you have to unscrew the screws that lock the battery. 4X The battery may be glued, but most often it is held on a double-sided tape and a down bar. Carefully remove the battery so that it does not interfere with access to the bottom of the board and the display plumes. To access the main plume of the display that runs through the bottom of the case, you need to dismantle the lower motherboard. This is a standard procedure for Xiaomi smartphones with a Micro-USB charging connector or USB-C located at the bottom. There are several screws around the charging connector and the lower board. Their number can vary depending on the revision of the board, but usually there are about 6-8 pieces. Unscrew all the visible screws that attach the board to the plastic frame. Also, pay attention to the antenna, if the cable is not accessible separately from the panel, then it can be accessed from the lower one, then the cable, which is also attached to the plate. 🔌 Disconnect the lower board plume from the main motherboard (if it goes through the top) or simply remove the fee if the display plume goes separately. 📡 Be careful with the antenna wire: it is thin and easily breaks with a sharp jerk. 🔩 Fold the screws in the order of their removal, so as not to confuse the length when Assembly. Now you need to disconnect the main plume of the display. 4X It connects to the main board on top, but it goes through the whole body. However, to remove the screen, it is often more convenient to first disconnect it from the board. Find the display connector on the main board (usually it is closed with a metal protective cover). Unscrew the screws that hold the metal connector protection. Remove the lid and gently bend the display plume upwards using a plastic blade to tweak the connector. Don't pull the plume itself, act only on the hard part of the connector. Once the screen is turned off, it can be considered electronically free. Removing the old display module At this point, we come to the most important part of it, which is the twisting of the broken screen. 4X It's glued into a plastic frame around the perimeter, and it takes heating to remove it to soften the glue. B-7000 Or a special tape holding module, turn the dryer on at the average temperature and evenly warm the perimeter of the screen during the course of the test. 2-3 Don't hold the hair dryer too close or at one point for a long time, so as not to overheat the matrix or plastic frame, which can deform. 80-90 After warming up, take a suction cup and attach it to the center of the screen (if the glass is whole) or use a thin plastic card/scapula by inserting it into the gap between the screen and the frame. Carefully cut the glue around the perimeter, slowly separating the module from the frame. Move slowly, constantly warming up difficult areas. ⚠️ Attention: If the screen is badly broken, use a wide transparent tape, cross-stick it over the front, and this will prevent the glass fragments from scattering and protect your fingers from being cut during the dismantling. When the glue is cut around the perimeter, gently lift the module. Make sure there are no areas that are stuck anywhere. If the module comes with a frame (which happens when you buy boxes), then the process is simplified - you will just need to move the motherboard and battery into a new frame. After removing the old module, thoroughly clean the plastic frame of the glue residue. Use alcohol and a blade or a special solvent for this. The surface must be perfectly smooth and clean, otherwise the new screen will fall unevenly, and there may be gaps or problems with the touchscreen. Installation of the new screen and assembly of the device Before installing the new display, it is strongly recommended to conduct a test connection. Do not glue the screen immediately! Connect the new module plume to the main board, connect the battery and turn on the smartphone. Check the matrix for broken pixels and responsiveness touch screen. If the test is successful, turn off the phone and disconnect the battery. Apply apply a thin layer to the new matrix when the aclipper does not slide into the display on the screen on the block, or put too much on the screen on the screen on the screen on the screen of the B-7000. Press the screen around the perimeter and lock it with rubber harnesses or a 15-20 minute load for primary glue grip. Make sure the display plume is properly stacked in the channel allocated to it. Next comes the reverse assembly process. Set the bottom board in place, connect the antenna wire (if any) and the main plume of the lower board. Switch all the screws of the lower board. Put the display plume to the main board and connect it. Important detail Screen Fixing Module to frame Use B-7000 glue, wait for polymerization Connection of display plume and battery Click connector should be clear Protection Installation of metal covers Do not pull the screws of connectors lids Final Installation of the rear cover equally latched around the perimeter After connecting all the plumes, install metal protective plates over the connectors and twist them into the screw Do not drag the screws of the connectors, for example, do not open the battery at first, or do not open the battery, for example, you can not open the back of the device. Often the problem is that the plume is not in contact with the plume, so try reconnecting it to make sure it's plugged in to the point, and another common problem is that there's a white frame around the perimeter of the new screen. This is a factory feature of some copies or original parts, and it is only removed software (via an engineering menu) or mechanical erasure (if it is paint), but this should be done extremely carefully##. ⚠️ Note: If after changing the screen, the smartphone stopped seeing SIM-check if you have damaged the antenna contact or forgot to connect the antenna wire when assembling the lower board. In some cases, users find that the proximity sensor is not working correctly after replacing the antenna. This could be due to improper installation of the protective glass (if it closes the sensor) or to the adhesive entering the sensor area. Carefully check the cleanness of the top of the screen before final assembly. Why does the new screen yellow or have distorted colors? This may be a sign of poor quality copy (LCD-It's also possible that you didn't remove the protective film on the inside of the new screen before you installed it, if you had one, and in rare cases you need to adjust the color rendering through the engineering menu. Can you replace only the glass, leaving the old one? Theoretically, yes, but at home it is almost impossible to do without special equipment (separator, laminator) and skills. 4X cheaper and more reliable to buy a ready-made module in the assembly (screen) + frame + How long does the glue dry? B-7000? Primary grip occurs in 1-2 minutes, but the glue is fully durable within 24 hours. On the first day after repair, it is better not to expose the smartphone to loads, shocks or moisture. What if the touchscreen does not work after replacement? Check the density of the connector planting. Make sure that the contacts are not dirty or oxidized. If the screen with a frame, check if the plume is transmitted at the folding site. If nothing helps, perhaps the new module is defective.