Why the screen on the Redmi Note 4X breaks and when to repair yourself
The Xiaomi Redmi Note 4X screen is one of the most vulnerable parts of the smartphone. Even with careful use of a crack, broken pixels or a complete failure of the display can appear after a fall from a height of 50 to 70 cm, a strong press or moisture. In 80% of cases, the damage is mechanical: the matrix cracks, the sensor ceases to respond to touch, or colored stripes appear, less often the problem lies in the plume, contact oxidation or factory defect.
Replacing a display yourself will cost 2-3 times less than a service center, but requires patience and accuracy. If you have already had experience disassembling a device (for example, you changed a battery or speaker), the process will not seem difficult. For beginners, the main danger is to damage flexible plumes, squeeze cables or forget to turn off the battery before work. In this article, we will analyze the step-by-step instructions with a photo, a list of tools and typical mistakes that should be avoided.
Before you start, assess the scale of the problem:
- 🔍 Cracks without disruption - you can do with replacing glass (cheaper), if the matrix is intact.
- 📵 The sensor does not work, but the image is there - the problem is in the touchscreen or plume.
- 🖥️ Black screen or artifacts – most likely damaged matrix or graphics chip.
- 💧 Corrosion traces under the display – cleaning of contacts and replacement of plumes is required.
What tools and spare parts will be needed to replace
Without the right tools, it's almost impossible to disassemble the Redmi Note 4X: the case is attached to glue and latches, and the display is connected to the board with fragile plumes.
- 🔧 Plastic blades (2-3 pieces) - for careful slashing of the body and disconnection of plumes.
- 🔨 Cross screwdriver (PH00 or PH0) — rear-cover.
- 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
- 🧲 Magnetic mat or container – to avoid losing small screws.
- 📱 New display - original (code) DM-050) or a qualitative analogue (for example, from BOE or Tianma).
- 🧴 Double-sided tape or glue B-7000 — fixate.
- 🔌 Tweezers and antistatic bracelet - for working with the board.
The cost of the original display for the Redmi Note 4X — from 2500 to 4000 rubles (2026), analogues will cost 1500-2500 rubles. Save on spare parts is not worth it: cheap Chinese matrixes often have poor color reproduction, uneven lighting or quickly fail.
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If you buy a display with AliExpress, choose sellers with a rating above 98% and reviews about compatibility with the Redmi Note 4X. Often included glue and shoulder blades – this is a plus.
Preparation of the smartphone: what to do before disassembly
Incorrect preparation can lead to data loss, short circuit or damage to the board.
Make a backup copy of the data (photos, contacts, messages)
Turn off the smartphone and remove SIM-memory-card
Charge the battery by 30-50% (to avoid deep discharge)
Prepare the workplace: clean desk, good lighting, no dust
Wear an antistatic bracelet or periodically touch a grounded object-->
Pay special attention to the battery. In the Redmi Note 4X, it is glued to the body, and if you unwisely remove it, you can damage contacts or puncture the battery. If the smartphone does not turn on, but responds to charging (vibrates or lights up the indicator), the problem may not be in the display, but in the plume or power connector.
⚠️ Warning: If the screen is completely black, but the phone makes sounds (calls, notifications), connect it to the PC. USB. If the computer detects the device, the problem is exactly in the display or the plume. If it doesn't, the motherboard may malfunction.
Step-by-step: how to disassemble the Xiaomi Redmi Note 4X and replace the display
The whole process will take 1-2 hours, if you act carefully, and we'll break it down into stages with photos and detailed comments.
Step 1: Removing the back cover
1. Heat the back end edge with a hair dryer (30 to 40 seconds in each section) and the glue will become softer and the cover will move away more easily.
2. Insert a plastic blade into the gap between the lid and the body (start at the lower corner where the charging connector is).
3. Carefully drive the blade along the edge, disconnecting the latches. Do not force - if the lid does not respond, warm up again.
Under the lid, you'll see the battery, the motherboard and the camera. The screws that attach the board are of different lengths -- remember or photograph their location so you don't get confused when you build them.
Step 2: Shutting off the battery
1. Disconnect the battery connector (it's under the black film) Use a plastic spatula to keep the contacts intact.
2 If the battery is swelling, don't try to remove it by force, it's dangerous. Contact the service.
Step 3: Disconnect the display plumes
1. Unscrew the screws that attach the metal plate over the display plumes (near the top edge of the board).
2. Carefully tuck the plume connectors (there are two of them: one for the matrix, the second for the touch screen).
At this point, you can check if the new display is working, plug it into the board (without glue) and turn on the phone, and if there's an image but the sensor isn't responding, the problem is the touchscreen plume.
Step 4: Install a new display
1. Apply a thin layer of B-7000 glue or double-sided tape to the smartphone frame.
2. Lay the new display, combining plume holes and speaker.
3. Connect the plumes and fix them with a metal plate.
4. Check the operability before final assembly.
What to do if the new screen is not working?
Step 5: Build a Smartphone
Collect the phone in reverse order:
- 🔋 Connect the battery and check the charging.
- 📲 Put the sleeves so that they do not overturn.
- 🔩 Twisting all screws (do not tug over!).
- 🔥 Warm up the edges with a hair dryer and press the back cover.
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The most common build error is forgetting to plug in the speaker plume or proximity sensor, and if the sound or the screen turns off after assembly, take the phone apart and check all the connectors.
Common Mistakes and How to Avoid Them
Even experienced wizards sometimes make mistakes when replacing the display, and here are the most common problems and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Overheating by a hairdryer (>90°C) | Melting plastic latches, battery damage | Keep the dryer at a distance of 5-7 cm, use the "warm air" mode. |
| Use of metal tools | Scratches on the body, short circuit on the board | Work only with plastic or wooden blades |
| Incorrect installation of plumes | Screen not working, sensor floats, artifacts | Check the connection before fixing the glue |
| Savings on glue | Display leaves after 1-2 weeks, dust hit | Use a quality B-7000 or original Scotch |
Another common problem is damage to the waterproofing gaskets, which are located around the volume and power buttons in the Redmi Note 4X, and if the gaskets break, the phone will lose its moisture protection, in which case seal the gaps with sealants or replace the gaskets (sold in remixes).
⚠️ Warning: If the phone starts to run out quickly after replacing the display, check if you have damaged the light sensor (it is located next to the front camera.
How much does it cost to replace the display in the service vs independently?
Prices for replacement screens in service centers depend on the type of display and the region. In Moscow and St. Petersburg, the service will cost 3000-5000 rubles (with spare parts), in the regions - 2000-3500 rubles. If you buy the display yourself, the cost of work will be 1000-1500 rubles. Here is a comparison table:
| Option | Cost (2026) | Pluses | Cons |
|---|---|---|---|
| Self-replacement (original display) | 2500–4000 ₽ | 30-50% savings, experience of repair | Risk of error, no guarantee |
| Self-replacement (analogue) | 1500–2500 ₽ | Minimum costs | Screen quality could be worse |
| Service centre (original) | 4000–6000 ₽ | 3-6 months warranty, professional work | Expensive, queues are possible. |
| Service centre (analogue) | 2500–3500 ₽ | Warranty, quick repairs | Quality of spare parts unknown |
If you've never repaired a smartphone but want to save money, try finding a self-service shop that provides tools and controls for a small fee (500-1000 rubles), a good trade-off between self-repair and trusting the service.
What to do after replacing the display: calibration and testing
Successful screen replacement is only half the battle, and after assembly, you need to check the performance of all functions:
- 📱 Display test: Run video with alternating colors (red, green, blue, black, white) to reveal broken pixels or uneven backlighting.
- ☝️ Sensor Test: Use the Touch Screen Test app (available on Google Play) to check for multi-touch and dead zones.
- 🔊 Speaker and microphone test: call another phone or record a voice message.
- 🔋 Battery test: if the phone began to discharge faster, check whether the battery plume has left.
If the sensor is not working properly (touching is not recorded where it is needed), calibrate:
- Go to Settings → System → Additional → Screen Calibration.
- Follow the instructions on the screen (usually click on the dots that appear).
- Reboot your smartphone.
If color distortions appear after the display is replaced (for example, the screen is too yellow or cold), check the color reproduction settings in Settings → Screen → Color Mode. The new display may have a different color temperature by default.