A broken smartphone screen is always an unpleasant surprise that can knock out any owner of equipment. When your favorite Xiaomi cracks or touchscreen stops working, the user faces a choice: carry the device to the service center or try to cope with the problem on their own. Self-replacement of the display saves a significant amount of money, but requires accuracy and the availability of basic tools.
In this article, we will discuss in detail the process of replacing the module on Xiaomi, Redmi and POCO devices. You will learn how to distinguish the original matrix from the copy, what tools you will need to work and what nuances you should pay attention to so as not to damage other components of the gadget. Properly selected components and strict adherence to the instructions are the key to successful repair.
It is worth noting that modern Xiaomi smartphones are often assembled on adhesive basis, which greatly complicates the process of opening the case compared to models with screws. However, with proper preparation and patience, even a beginner can perform repairs. The main thing is to take your time and carefully monitor your every action so as not to damage the plumes or cables.
Diagnosis and selection of components
Before disassembling the device, you need to accurately determine the nature of the damage. Often users confuse the broken glass (touchscreen) with the damaged matrix, although in modern Xiaomi smartphones these elements are inextricably linked into a single display module. If the image on the screen is distorted, there are black spots, stripes or sensor does not respond to touch at all, then replacing the glass separately will not help - you will need a complete replacement of the module.
When choosing a new part, it is critical to pay attention to the type of matrix. Xiaomi devices use IPS and AMOLED technologies. The difference between them is huge: AMOLED screens provide deep black color and high energy efficiency, but they are much more expensive. IPS matrixes are cheaper, but can have less saturated colors and thicker bezels. Buying a non-original spare part can cause the Always On Display function to stop working and the fingerprint scanner under the screen will fail.
It’s also worth checking whether a particular display model is compatible with your smartphone version. Even within a single line, such as the Redmi Note, different types of plumes can be used. Make sure the module you purchase is labeled to match your device. Using an inappropriate screen module can lead to incorrect display of colors or complete absence of an image.
Tools and workplace preparation required
Quality repairs are impossible without proper tools. To replace the display on Xiaomi, you will need a minimum set that can be purchased from any electronics store or ordered online. The lack of specialized tools often leads to damage to the case or damage to new components during the installation process.
- 🔧 Set of screwdrivers (cross and flat) - for twisting screws of fastening of the board and dynamics.
- 🔥 Dryer or thermophen - necessary to soften the glue holding the back cover and the display itself.
- 🎴 Plastic blades and mediators - for a careful opening of the body without scratches.
- 🧲 Magnetic mat or organizer – to avoid losing tiny screws of different sizes.
- 🧴 Clay. B-7000 or T-7000 — for reliable fixation of the new display and cover.
Special attention should be paid to the organization of the workplace. The surface should be clean, dry and well lit. It is recommended to use an antistatic mat, as static electricity can damage the sensitive electronics of a smartphone. All activities are best performed in bright light to see the smallest details and connectors.
Before starting work, be sure to turn off the smartphone. If the battery of the device has a high charge, it is recommended to discharge it below 25% to minimize the risk of fire or short circuit in case of accidental damage to the battery. SIM-card and memory card, if installed.
☑️ Preparation for repairs
The process of disassembling the smartphone body
Disassembly of modern Xiaomi models, such as the Redmi Note or Mi series, begins with the removal of the rear cover. Unlike older models, you rarely find screws hidden under plugs. The main fixing element is the adhesive base. To soften it, you need to evenly warm the perimeter of the device with a hairdryer to a temperature of about 80-90 degrees Celsius.
After warming up, insert a plastic blade or mediator into the junction between the frame and the back cover. Move the tool around the perimeter, gradually peeling off the cover. Do not use metal objects, as they can split the glass of the rear panel or damage the internal components. Act slowly and without sharp jerks, so as not to break the plume of the fingerprint scanner if it is glued to the cover.
⚠️ Warning: When detaching the back cover, be extremely careful with the fingerprint scanner plume. In many Xiaomi models, it is glued to the cover, and a sharp movement can cause it to break, which will require additional replacement.
Once 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, find the battery plume that's connected to the motherboard, and gently disconnect it using a plastic blade, and that will turn off the device and keep you from accidentally shorting when you're working with the other components, and then you can start removing the plastic panel that's covering the motherboard.
Nuances of disassembly of glued housings
Dismantling of the old display module
Once the plastic panel is removed, you can access the main components, you can remove the old display, most Xiaomi models have the display module glued to the frame, you need to heat it up again, you need to warm up the front of the smartphone with a hairdryer, trying not to overheat the battery if it was not removed earlier.
Use a suction cup to lift the edge of the display, and insert a thin plastic card or blade into the gap. Move the tool along the perimeter of the screen, cutting the adhesive layer. Act very carefully: too deep immersion of the tool can damage the touchscreen or the matrix itself, which is especially critical if you plan to keep the old screen (although with a broken screen, this is not so important).
When the module is separated from the frame, flip the smartphone and find the plumes of the display and touchscreen, which are connected to the motherboard through special connectors. Carefully bend the locks (if any) and disconnect the plumes. Sometimes the plumes can be additionally glued to the case or closed with metal plates, in which case they must be removed first.
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Before installing a new display, be sure to plug its plumes into the board and turn the phone on without gluing the module, which will check the performance of the touchscreen and matrix, as well as the quality of color reproduction, before you fix everything with glue.
Installation of a new screen and assembly
The new display module is installed in reverse order. First, apply a thin layer of special adhesive (B-7000 or analog) to the frame of the case. Do not overdo it with the amount of glue, otherwise it can squeeze out on the screen or get into the device. Spread the glue evenly and let it dry for 1-2 minutes to the state of stickiness.
Carefully place the new module on the frame, combining all the edges. Make sure that the front camera and light/approach sensors match the cutouts. Connect the display and touchscreen plumes to the motherboard before the characteristic click. After that, you can temporarily connect the battery and check the operation of the device.
If everything works correctly, turn off the battery, apply glue to the back cover and press it tightly against the body. For better fixation, it is recommended to use rubber bands or special clips for 15-20 minutes until the glue is grasped. Full polymerization of the glue takes about 24 hours, so it is better not to expose the smartphone to loads on the first day.
| Work phase | Implementation time | Difficulty | The necessary tool |
|---|---|---|---|
| Warming and removal of the lid | 5-10 minutes | Medium | Fen, spatula |
| Disconnection of the battery and removal of protection | 3-5 minutes | Low. | Screwdriver, tweezers. |
| Dismantling the old display | 10-15 minutes | Tall. | Hair dryer, sucker, blade. |
| Installation and verification of a new module | 10-15 minutes | Medium | Glue, clamps. |
⚠️ Warning: Do not turn on your smartphone immediately after assembly if you have used a large amount of glue. The adhesive vapors can condense on the internal components and cause the contacts to oxidize. 30-60 minute.
Typical errors and troubleshooting
In the process of self-repair, users often make mistakes that can lead to the need to re-disassemble or even break the smartphone. One of the most common problems is the incomplete connection of the plume. If the screen does not light up after assembly or the touchscreen is partially working, the connector is likely to be left behind, you will have to disassemble the device again and reconnect the cables.
Another common mistake is to damage the plume when running sloppy. Xiaomi display plumes are very thin and sensitive to clogs. If you notice physical damage to tracks, you can only restore performance by replacing the module. Also, you often forget to remove the protective film on the inside of a new display before installation, which leads to rainbow spots or uneven backlighting.
If the screen is working after the replacement but there are problems with brightness or color reproduction, you may have installed a non-original matrix of poor quality. Cheap copies often do not have calibration data, which leads to incorrect display of colors, in which case only calibration through the engineering menu (code # # #64663##) or replacing the module with a better one can help.
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The main difficulty of repairing Xiaomi is the adhesive assembly. Patience and accuracy when working with glue and thin plumes is more important than physical strength.