Replacement of the display on Xiaomi Redmi 4X: a detailed guide with nuances

Xiaomi Redmi 4X is one of the most popular budget smartphones of 2017, but even it is not immune to falls and cracks on the screen. If your display is covered with a web, stopped responding to touches or completely went out, do not rush to carry the phone to the service: you can replace the module yourself, saving up to 70% of the cost of repair. In this article, step-by-step instructions with a photo, the choice of the original or analog screen, as well as hidden nuances that even experienced masters keep silent about.

The complexity of the procedure is average (3 out of 5), but it requires care and patience. The main risks are damage to the plumes, break the contacts of the battery or accidentally close the board. We will analyze each step so that even the beginner can cope without fatal errors. And if you doubt yourself, there is a checklist at the end of this article to check the readiness for repair.

We warn you right away: the Redmi 4X has a glue display module, so you can't do without a hair dryer or heat tile, and you'll need specialized tools, which are listed below. If you only have a screwdriver and a knife on hand, you'd better postpone the repair until you buy the right one.

1. Diagnosis of malfunction: is the display to blame?

Before replacing, make sure that the problem is in the screen, not in other components.

• 🔍 Cracks or broken glass is the most obvious sign, but even here, there's a caveat: if the sensor is working and there's an image, maybe just replacing the touchscreen (top layer) is enough.
• 🖥️ Artifacts on the screen: stripes, flickering, broken pixels, which could indicate damage to the matrix or plume.
• 👆 The sensor isn't working, but the image is there -- the problem is the touchscreen or its plume.
• 🔋 The screen doesn't turn on, but the phone vibrates when charging - check the backlight or display contacts.

If the smartphone does not respond at all (no vibration, no charge), the problem may be in the power controller or battery, in which case replacing the screen will not help.

⚠️ Warning: If the phone falls into water or is subjected to extreme humidity before it breaks, don't disassemble it - corrosion on the board can lead to short circuits, and professional cleaning is required.

For accurate diagnosis, connect Redmi 4X to your computer via USB. If the PC detects the device (connection sound, charging), but the screen is dead, the problem is in the display or its plumes. If there is no reaction, the motherboard malfunctions.

2. Selection of display module: original vs analog

The quality of the new screen depends on 90% of the success of the repair. for Xiaomi Redmi 4X there are three options:

For the Redmi 4X, it is critical to choose a module with the right plume connector.

• 📱 With the GFF touchscreen (Glass-Film-Film) is thinner, cheaper.
• 📱 With a touchscreen OGS (One Glass Solution) — stronger, but more expensive.

You can tell the type of your screen by the serial number on the battery sticker or by using the service menu (type ##4636## and check the "Touch Panel" line). If you buy the wrong option, the module will either not stand up or the sensor will not work.

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Before buying, check the reviews of the seller — often selling fakes under the guise of the originals. Pay attention to the photos of the real product, not stock pictures.

3. Necessary Tools: What to Buy in Advance

Without the right tools, it's almost impossible to replace the display on the Redmi 4X.

• 🔧 Sets of screwdrivers: cross PH00, flat 1.5 mm, five-pointed (for screws under the tray SIM).
• 🔥 A hair dryer or heat tile (power of at least 1000 W) - for softening the glue.
• 📏 Plastic shoulder blades/mediators (2-3 pieces) – to tamper with the screen.
• 🧲 Suction cup (diameter 4-5 cm) - to remove the display.
• 🔌 Tweezers (preferably antimagnetic).
• 🔋 New adhesive (e.g., B-7000 or double-sided tape 3M 9448A).
• 🧴 Isopropyl alcohol (90%+) — clean-up.
• 📱 Tester or multimeter (optional) to check the circuits after assembly.

Also, prepare your workplace: a clean desk, good lighting, an antistatic mat (or at least a plastic film) and the Redmi 4X is sensitive to static electricity, which can damage chips.

⚠️ Warning: Don't use metal blades, they scratch the frame and can close the contacts on the board. Also avoid Chinese "repair kits" for 200 ₽: they often have blunt screwdrivers that rip off the screws.

I turned off my phone and pulled it out. SIM-map|Charged the battery by 30-50% (so as not to turn off during repairs)|I have prepared all the tools and a new display.|Cleaned the workplace of dust and debris|Photographed the disassembly process (for reverse assembly)-->

4. Step-by-step disassembly of Xiaomi Redmi 4X

Now, to the most critical stage, follow the instructions in strict order, and skipping the steps could damage the board.

Step 1. Turn off and heat up

Turn off the phone, take out the tray SIM/microSD. Warm up the perimeter edge with a hairdryer for 2–3 minutes, keeping it at a distance 5–7 see Temperature must be 60–70°C (to soften the glue but not melt).

Step 2. Remove the back cover

Carefully apply a plastic blade to the bottom edge of the lid (where the charging connector is), then move around the perimeter, separating the latches. Be careful - the lid is attached to 12 plastic clips that are easy to break.

Step 3. Shutting down the battery

When you remove the lid, first of all, disconnect the battery, and it will prevent short circuits.

1. Unscrew 4 screws that fix the metal plate over the battery.
2. Carefully tuck the battery connector with a plastic spatula and disconnect it.

Step 4: Removal of the display module

Now warm up the screen with a hair dryer again (1-2 minutes). Stick the suction cup to the bottom of the display and pull up. Insert a plastic blade into the resulting gap and slowly lead it along the edge, separating the glue. Take your time - if you pull too hard, you can tear the plumes!

After the screen is separated, gently turn it over and disconnect:

• 🔌 Display plume (top connector).
• 🔌 The touchscreen plume (bottom connector).
• 🔋 The proximity/light sensor plume (small white connector).

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Don't pull the plumes, they're fragile! Always grab the connector, not the wires.

5. Installation of a new display and assembly

Before installing the new module, clean the phone frame of the old glue with isopropyl alcohol. Do not use acetone or solvents - they will damage the plastic!

Step 1 Preparing a new screen

Remove the protective film from the inside of the module. If the glue is not previously applied, carefully paste the 3M double-sided tape around the perimeter of the frame. Don't close the connectors!

Step 2. Connect the plumes

First, connect all the plumes to the board (order is important!):

1. Approximation/light sensor.
2. Touchscreen plume.
3. The display plume (the widest).

Make sure the connectors are fully in - they should click.

Step 3: Installation of the screen

Carefully place the module on the frame, combining the holes under the buttons and the speaker. Press the edges to make the glue grab. Then warm up the hair dryer of the edge of the screen (30-40 seconds) for better fixation.

Step 4: Reverse assembly

Collect the phone in reverse order:

1. Put the battery on.
2. Secure the metal plate with screws.
3. Install the back cover (start at the top where the camera is).
4. Insert the SIM/microSD tray.

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Before you finish assembly, turn on your phone and check the screen. If you have artifacts or the sensor is not working, double-check the plumes.

Checking and calibration

After assembly, turn on Redmi 4X and run the tests:

• 🎨 Color rendering: Compare the shades to another device. If the colors are too cold/warm, select the sRGB profile in the screen settings.
• 👆 Sensor: Check the response to touch across the screen (use the Touch Screen Test app).
• 🔦 Backlight: Is there any dark spots or uneven glow?
• 📞 Approximation Sensor: During a call, the screen should go out if you hold your hand.

If the sensor is not working properly (for example, clicks are offset), calibrate:

1. Go to Settings → About Phone → MIUI version (click 7 times to activate Developer Mode).
2. Return to Settings → Additional → For developers → Calibration of the sensor.
3. Follow the instructions on the screen.

⚠️ Warning: If the screen flashes or turns off spontaneously after the replacement, check the contacts of the backlight plume. Often they oxidize, clean them with alcohol and press the connector tightly.

7. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing the display with a Redmi 4X.

Another common problem is that the screen will detach after a week, and it's because of:

• 🔥 Insufficient heating of the glue during installation.
• 🧴 Use of cheap glue (e.g., Moment instead of B-7000).
• 💦 Dust or moisture exposure under the screen.

To avoid detachment, after assembly, put the phone under the press (for example, between two books) for 1-2 hours.

FAQ: Answers to Frequent Questions