Xiaomi Redmi 4X is one of the most successful models of the budget segment, released by the company. However, even the strong glass Gorilla Glass 3 installed on the front panel is not immune to falls or impacts on hard surfaces. A crack on the screen not only spoils the aesthetic appearance of the device, but can interfere with the normal operation of the sensor or lead to further destruction of the matrix.
Many users face the dilemma of whether to bring the device to a service center, where the cost of work can be up to 70% of the cost of a used device, or try to replace the glass yourself. In this article, we will discuss in detail the process of restoring the display module, assess the risks and provide a step-by-step algorithm for those who decide to save.
It is worth noting that Redmi 4X has IPS-This makes it difficult to replace, because it requires careful separation of layers without damaging the display itself. If you've never held a solder dryer, weigh your strength carefully before starting the procedure.
Evaluation of damages and choice of repair method
The first step is to diagnose, look carefully at the damage, if the surface is only cracked, but the image is clear, the colors are not distorted, and the sensor responds to touches throughout the area, then you're in luck, in which case you can replace the external glass.
The situation changes dramatically if the matrix is damaged, black spots, stripes, no image or broken pixels indicate that there is nothing to save, and only a complete replacement of the display module in the assembly will help. This is easier technically, but more expensive in terms of the cost of spare parts.
⚠️ Attention: If the crack is going through the entire screen and you see a black dot at the impact site, chances are the matrix is already damaged, even if it's still working.
The second important aspect is the cost. Original glass costs a penny, but it requires a separator and a laminator (or at least a hairdryer and a frame). The module assembled costs more, but it is put in 15 minutes without special equipment. For Xiaomi Redmi 4X, it is often more profitable to buy a module with a frame, since the risk of breaking the matrix when glass is repainted at home is very high.
Tools and workplace preparation required
You can't have a good repair without preparation. You're going to need not only a new part, but a toolkit, and you need to have adhesive backing and small electronics that you can find in radio parts stores or marketplaces.
Collect the following set of tools before starting work:
- 🔧 Set of screwdrivers (cross-haired) PH000, flat) for shell screws.
- 🔥 Thermophen (building with temperature adjustment or soldering) for softening glue.
- 💳 Plastic blades and mediators for opening the body.
- 🧴 Clay. B-7000 or E-8000 fix.
- 🧹 Isopropyl alcohol and lilac-free wipes.
Organize the workplace. The surface of the desk should be clean, flat and well-lit. Use an antistatic mat or just a blank piece of paper so that the small screws don't get lost. Be sure to take the static electricity off your hands by touching the battery or grounded object before touching the plumes.
⚠️ Warning: Don't use superglue (cyanacrylate) to glue glass! its vapors can settle on camera lenses and sensors, permanently disabling them, and the glue itself makes the glass brittle.
The process of disassembling the smartphone Xiaomi Redmi 4X
Disassembly begins with the removal of the tray SIM-This is standard procedure for all modern smartphones, and then you have to unscrew the two screws at the bottom of the case, on the sides of the Micro-USB charging connector.
After removing the screws, carefully insert a plastic blade or mediator between the back cover and the frame. The back cover is usually not warmed up, it holds on the latches. Lead the tool around the perimeter, snapping the locks. Move slowly so as not to break the plastic.
☑️ Checking before disassembly
When you take the lid off, you'll see the battery and the motherboard. First of all, you'll take the battery plume off the board. This is a critical step for electronics safety. Then you'll unscrew the plastic bar that covers the main plumes of the display and touchscreen. You'll need to carefully unplug the plumes by putting your nail or plastic blade on them.
Dismantling of the old display module
Now you have to take out the display itself. In the Redmi 4X, it's glued to a metal frame. It requires heating. Turn on the thermophen and set the temperature at about 80-100 degrees. Warm up the front of the screen evenly for 2-3 minutes.
Don't overheat the device by holding the hair dryer at one point for too long so as not to damage the matrix or plastic frame. After warming up, insert a thin line or a special string into the gap between the frame and the glass.
When the adhesive layer is cut, gently lift the module. If it's going tight, add a little more heat. Remove the glue residue from the metal frame using isopropyl alcohol and a blade. The surface should be perfectly smooth and clean for the new glass to be firmly fixed.
Nuance with a lighting plume
Installation of new glass and assembly
Make sure you fit in the new part before you install it, make sure the holes under the speaker, camera and sensors match. If you change the module assembled with a frame, the process is simplified: you just need to rearrange the motherboard, battery and control boards.
Apply the B-7000 glue thinly onto the frame. Don't pour the glue straight out of the tube -- you'd better use a thin needle or toothpick for spot application. The glue will be hard to remove, and it can stain the matrix from the inside.
| Work phase | Implementation time | Difficulty | The necessary tool |
|---|---|---|---|
| Removal of the back cover | 2-3 minutes | Low. | Mediator, screwdriver. |
| Shutting down the plumes | 1-2 minutes | Medium | Plastic spatula |
| Module removal (heating) | 5-10 minutes | Tall. | Fryer, string |
| Cleaning and gluing | 10-15 minutes | Medium | Alcohol, glue, rubber bands |
After applying the glue, gently place the new module in place. Squeeze it around the edges. Lock it with stationery bands, wrapping the smartphone around the perimeter (not too tight to keep the screen from crushing). Leave to dry for 1-2 hours.
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For uniform distribution of the glue and fixing the module during drying, you can use special pressing frames or simply tightly wrap the phone with rubber cross-cross harnesses.
Checking the efficiency and frequent errors
Once the glue is in place, you can start the final assembly, plug in the display and touchscreen, then plug in the battery plume, without twisting the screws, turn on the phone, check the sensor at all corners of the screen, the brightness of the backlight and the front camera.
If everything works correctly, turn off the device, twist the motherboard fasteners and put the back cover in place. Twirl the screws from the bottom. Now the Xiaomi Redmi 4X is again as new.
But beginners often make mistakes. The most common is damage to the plume when it's not properly disconnected; the second is dust between the glass and the matrix that can't be removed without being disassembled again; the third is using too much glue that's being squeezed onto the screen.
⚠️ Warning: If the phone doesn't turn on or charge after assembly, check if the battery connector is tightly latched. Sometimes you need to press it with force until you click.
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The key to success is cleanliness in the gluing area and accuracy in working with thin plumes.