Modern Xiaomi smartphones are famous for their high-quality displays, but even the most durable glass Gorilla Glass is not immune to accidental falls. If the screen stopped responding to touch or there are cracks that interfere with view, replacing the touchscreen becomes the only right solution to restore functionality.
Many users bring the device to the service immediately, believing that the replacement procedure is too difficult for home execution. However, with the accuracy, the right tools and clear instructions to change the touchscreen to Xiaomi, you can yourself, saving a significant amount of money.
In this article, we will discuss the diagnostic process, the selection of components and the replacement procedure itself. You will learn about the nuances of working with adhesive bases and the risks that you can face in the process. Replacing the touch screen separately from the matrix is possible only if the image on the screen is free of defects (spots, stripes, broken pixels).
Diagnosis and selection of components
Before disassembling, you need to determine exactly the nature of the malfunction. Often users confuse the breakdown of the touch glass with the failure of the plume or the display itself. If the image is clean, the colors are bright, but the phone does not respond to touch or reacts chaotically ("dance" points), the problem is in the touch screen. If there are black spots, vertical stripes or flicker, you will need to replace the entire display module.
When choosing a new spare part on the market, you can encounter three main types of glass. OEM-The low-end version is often inferior to the original in sensitivity and oleophobic coating. Quality counterparts (e.g. from trusted third-party manufacturers) can be almost identical to factory parts. And finally, original parts that cost more, but guarantee full compatibility and durability.
- 🔍 Visual inspection: Check if there are chips at the edges and if the glass has moved away from the frame of the case, which may indicate a bloated battery.
- 📱 Multi-touch test: Turn on the engineering menu or use special applications to check the number of simultaneously recognized touches.
- 🔌 Trail check: Light tapping on the body can reveal poor contact if the screen is turned on and off.
It is important to understand that in modern Xiaomi smartphones (especially in the Mi and Redmi Note series), the touchscreen is often already glued to the frame or matrix in the factory. This makes it easier to replace, but requires accuracy when transferring internal components from an old broken module. Buying a “bezels-free” touchscreen makes it much more difficult, since it requires the use of a special glue B-7000 or T-7000 and perfect alignment.
Tools and workplace preparation required
You can't repair things properly without the right tools. Trying to open the case with a credit card or knife can damage plumes, batteries, or plastic latches. To safely replace the touchscreen with Xiaomi, you'll need a minimal but specialized set of tools.
The main tool for working with adhesives is thermophene, or at least a household heating pad, which is necessary to soften the glue that holds the back cover or display module. The use of an open flame is strictly prohibited, as it can damage the matrix or ignite the battery.
- 🔧 Set of screwdrivers: It is mandatory to have cross screwdrivers of different sizes (usually) PH00 and PH000) and sometimes flat or Torx, depending on the model.
- 🛠️ Mediators and blades: Plastic tools for slashing the body and separation of plumes without the risk of short circuit.
- 🧲 Magnetic mat: will help not to lose tiny screws and spread them in order of removal, which is critical when Assembly.
Also, be sure to prepare a suction cup for neatly lifting glass and tweezers with curved ends to work with small parts.The workplace should be well lit and free of foreign objects.It is recommended to use an antistatic bracelet or periodically touch a grounded metal object so that static electricity does not damage the sensitive electronics of the smartphone.
☑️ Preparation for repairs
The process of disassembling the Xiaomi smartphone
The beginning of the work is always the same: you need to remove the tray for SIM-The next step depends on the design of the particular model. In most modern Xiaomi, the insides are accessed through the back cover, which is glued around the perimeter. Some budget models may have a removable cover, which makes it much easier to do.
To remove the back cover, heat the perimeter with a hair dryer to about 80-90 degrees. Don't hold the hair dryer at one point for too long to overheat the battery. After warming up, insert the suction cup into the bottom of the lid, pull up slightly, and insert a plastic spatula into the gap. Carefully shovel along the edges, cutting the adhesive layer.
⚠️ Warning: Don't try to open the case if it's still cold.A sharp force can cause the back cover glass to burst, and in budget models, the pressure can crack and the touchscreen itself.
Once you remove the lid, you'll see the battery, the mainboard and the plumes, and the first thing you need to do is to disconnect the battery plume from the motherboard, and this will turn off the device and eliminate the risk of short circuits when working with other components, and then you unscrew the screws that lock the protective plates that cover the connectors of the display.
Dismantling the old touchscreen and module
If you bought a touchscreen built with a frame (which is most likely for modern models), you will need to transfer the motherboard, battery and other nodes from the old broken module to a new one. If you change only glass, the process will be different, but in 90% of cases, it is recommended for Xiaomi to replace the module.
First, disconnect the display and touchscreen plumes, which can be pinned with metal brackets or simply inserted into connectors. Be very careful: the plumes are very thin and easily torn when handled carelessly, use a plastic shoulder blade or tweezers with soft sponges to extract them.
Then you take the module out. In some designs, it's also glued. Heating is not always necessary, it's often enough to gently shovel the module, and if the module is framed, then after all the plumes are disconnected and the screws are twisted around the perimeter, it is easily removed.
What to do if the plume is broken?
When you transfer components from the old module to the new one, pay attention to the speaker grid and sealing gums. They need to be carefully removed and re-adhesed to the new frame so as not to lose moisture protection (if claimed) and sound quality. Old glue from the frame is better removed with alcohol or a special solvent.
Assembly of the device and check of performance
Before you finalize and seal the case, you need to do a pre-test, plug the new touchscreen and display into the motherboard, then plug the battery in, turn the phone on without putting the module in place, and check the reaction to touch across the entire screen area.
Use the built-in Xiaomi tester. To do this, type ##6484## in your phone to log into the CIT engineering menu. Select Touchpanel and test the lines. If all the lines light up and the phone responds correctly, you can start the final build.
Apply a new glue (B-7000 or special glue pad) to the frame of the new module or housing. Spread it evenly in a thin layer. Place the module in place, making sure that all the plumes are stacked correctly and not clamped. Twisted all the screws in reverse sequence.
| Phase | Action. | Important nuance |
|---|---|---|
| 1 | Preparation | Turn off the phone, remove the SIM |
| 2 | Autopsy | Heating glue, shovel work |
| 3 | Shutdown | First to turn off battery |
| 4 | Replacement | Transfer of fees and plumes |
| 5 | Test | Checking before sealing the case |
After installing the module and twisting the screws, press the edges of the case or install the back cover. To fully polymerize the glue, it is advisable to put the device under the press (or press it with books) for 1-2 hours. Do not turn the phone on immediately, let the glue grip to avoid displacement of the components.
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Use rubber harnesses or stationery gums to tightly press the body of the smartphone during drying of the glue. This will ensure uniform fit and no gaps.
Typical mistakes and expert advice
One of the most common mistakes is to ignite the surface before you stick a new glass. The dust between the layers will create bubbles that will be visible when the screen is off. Always wipe the surface with a lilac-free wipe soaked in alcohol.
Another problem is screw tightening. Xiaomi cases often use plastic or soft alloys. Excessive effort can lead to thread licking or cracks in the plastic around screw holes. Twisting screws to light resistance, without fanaticism.
- 🔋 Bloated battery: If you notice that the battery is swelling, you need to replace it immediately.
- 💧 Waterproof: After self-repair, the smartphone's moisture protection is lost. Don't check the new touchscreen underwater.
- 🧹 Clean: Work in a clean room. Fine dust can get under the touchscreen and create dead zones.
⚠️ Note: If the phone stopped seeing after assembly SIM-If you're not tidy, you can forget to press the antenna contact plates against the body.
Don’t rush to throw away an old broken module right away, sometimes it’s left with some small components that may be needed in the future, such as a vibrator or charging connector, if they are structurally connected to the frame.
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The quality of the adhesive and the cleanliness of the assembly determine not only the appearance, but also the durability of the repair.