Broken glass or leaky smartphone display is always an unpleasant surprise that jeopardizes the continued use of the gadget. Owners of Xiaomi Redmi devices often face the need to replace the module, as budget models may be less protected from impacts when falling. However, self-repair is quite real if you act carefully and have the right tool at hand.
Before you start dismantling, it’s important to understand that modern smartphones are a complex sandwich made of glass, plastic and metal. Replacing the screen with Xiaomi Redmi requires not only physical effort, but also safety to avoid damaging the plumes or blowing up the battery. In this article, we will discuss the replacement process in detail, starting with the preparation of the workplace.
It's worth noting that the quality of the final result depends on the quality of the spare part purchased. There are many copies on the market that can differ in color reproduction or touchscreen sensitivity. OLED (if the model supports it, it will provide better autonomy and brightness compared to cheap models IPS-analogue.
Tools and workplace preparation required
The success of the surgery depends 90 percent on what you do, and don't try to pick the case with a knife or open the phone with your teeth, which is guaranteed to damage the frames or, worse, to a finger injury, and you'll need a specialty kit that you can buy from any radio store or order online.
Pay special attention to the cleanliness of the surface. Fine dust caught between the matrix and the protective glass will look like a black artifact that can not be removed without re-disassembling. The best way to cover the table with a white sheet of paper or fabric, which clearly shows all the screws and small details.
- 🔧 Screwdriver kit: a cross Phillips #00 and possibly Torx stars for some models must be available.
- 🌡️ Thermophen or heating pad: necessary to soften the glue holding the back cover or display frame.
- 💳 Plastic spatula (mediator): for safe snapping clips without scratching the body.
- 🧲 Magnetic mat or organizer: so that the screws do not run around the table and do not get lost.
⚠️ Warning: Before starting any work, be sure to turn off the smartphone. Attempting to disconnect the plumes under voltage can lead to a short circuit and failure of the power controller on the motherboard.
Also, be sure to prepare a B-7000 or T-7000 adhesive container if your model has a display glued to a frame rather than screws attached.This adhesive dries for about 24 hours, so fixing the phone with rubber bands or loads after assembly will be mandatory.
Diagnosis of malfunction and selection of spare parts
Before you disassemble a phone, you need to clearly identify what exactly went wrong. Often users confuse damage to the external glass with a malfunction of the matrix. If the image is clear, the colors are saturated, but the glass is cracked, you need a replacement glass (office press), but at home, usually change the entire module assembly.
If you have black spots, stripes, or the phone reacts randomly (called "ghost touch"), the problem lies in the display module itself. In such cases, changing the glass will not help, you need a complete replacement of the component. For Redmi Note and Redmi models, the modules are often unified, but always check for compatibility with the model code.
When buying a new part, pay attention to the presence of bezels. On-frame modules cost more, but they take 15 minutes to install versus an hour of fuss with repainting the old screen. Cheap copies often have worse oleophobic coating and dimmer backlighting.
| Type of malfunction | Symptoms | What to change | Difficulty |
|---|---|---|---|
| Broken glass | Cracks, chips, the whole image | Glass (press required) or module | High (for glass) |
| The flow of the matrix | Ink stains, stripes | Display module | Medium |
| The touch doesn't work. | The screen is on, but not responding. | Display module (touch built-in) | Medium |
| No image. | Phone vibrates, screen black | Display module or plume | Medium |
How to check a new screen before installation?
The process of disassembling the Xiaomi Redmi smartphone
The beginning of disassembly is the most important step. In modern Redmi models, the internals are most often accessed through the back cover, which can be glass or plastic and is attached to two-part glue, and it requires uniform heating of the perimeter of the body to remove it.
Heat the back cover with a hair dryer to about 80-90 degrees Celsius. Keep the hair dryer in motion so that the battery or plastic does not overheat locally. After warming up, insert the suction cup into the bottom of the lid, pull it back a little, and gently walk the mediator around the perimeter, cutting the adhesive layer.
- 🔋 Battery Disconnection: First thing after removing the lid, disconnect the battery plume from the motherboard.
- 🔩 Dismantling protection: Remove the plastic lining covering the bottom of the board and display plumes.
- 🔌 Disconnect plumes: Carefully click the connectors of the display and touch screen (if they are separate).
Next, you need to unscrew all the screws that hold the display frame. In some models, the screws can be hidden under stickers or rubber plugs. Be careful: the length of the screws may vary, so fix their position.
☑️ Checklist before screening
Once all the mounts are free, you can remove the screen, if it's glued to the frame, use a thin line or a special tool to cut the glue, and the movements should be sawing, without any sudden jerks, so as not to crush the matrix.
Installation of a new display module
The new screen is installed in reverse order, but with important nuances. If you bought a frameless module, you'll have to move all the small details (the speaker, the sensors, the button plumes) from the old broken screen, which requires jewellery precision and tweezers.
Before you final glue, make sure you check the new module's performance, plug in the plumes, turn on the phone, and check the response across the entire screen area, brightness and autorotation. Make sure there are no dead zones.
⚠️ Warning: Display plumes are very thin and fragile. When connected, insert them strictly perpendicular to the characteristic click.
Use a B-7000 glue to fix the module in the frame. Apply it with a thin strip along the perimeter of the frame, avoiding hitting the matrix itself and into the speaker holes. Remove the glue immediately with a dry wipe.
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To make the glue better grasped, after installing the screen tightly pull the phone with several stationery bands around the perimeter and leave to dry for 2-3 hours.
So, if you put the case together, plug the battery in, and start the device, and if the screen catches fire and the image is clear, halfway through, you just have to lock the back cover in a fresh layer of glue.
Calibration and touch screen check
After replacing the screen with Xiaomi Redmi, you may need to calibrate the sensor, especially if you installed a non-original copy.In the shell of the MIUI there is a hidden engineering menu that allows you to conduct hardware tests.
To enter the check mode, dial the ##6484## in the Phone app. This will open the CIT engineering menu. Here you need to select the item associated with the display check (usually called "Touch" or "Display").
The path on the engineering menu:
CIT Menu → Touch → Drawing lines in all squaresSwipe your finger through all the cells on the test screen. If a zone doesn't stain or reacts late, try recalibrate through special utilities or just restart the device. Sometimes the system takes time to adapt to the new digitizer.
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If after replacement touchscreen works incorrectly (cursor shakes), the problem may be in poor contact of the ground plume or low quality of the spare part itself.
Also check the proximity sensor. During the conversation, the screen should go out when you hold the phone to your ear. If that doesn't happen, you may have poorly cleaned the area of the sensor of the glue or installed the protective film incorrectly.
Frequent errors and operating tips
The most common mistake of beginners is to use too much glue, and the excess B-7000 can squeeze out and stain the camera or get into the connector contacts, causing oxidation in the future.
Another problem is that the plume is damaged when you build it, and if you pull the plume too tightly or you pinch it with a screw, after a week, the screen may go out or start flashing. Always stack the plumes straight, on the factory guides.
- 🧹 Do not forget to wipe the inside of the new glass with an alcohol napkin before gluing.
- 🔋 Don’t heat your phone with a hair dryer for too long if the battery is already inside – it’s dangerous.
- 🛡️ Immediately after repair, stick a protective glass to remove the new screen from scratches.
Remember, self-repairing is a no-brainer if it was still in effect, but for older Redmi models, it’s often the only cost-effective way to bring the phone back to life.