Smartphone Xiaomi Redmi 4X has proven to be a reliable device with a metal body, but even durable materials do not always save from accidental falls. broken glass or leaky display is a common problem faced by owners of gadgets. Self-replacement module will save a significant amount of money compared to the treatment center, where often you have to pay not only for parts, but also expensive work of masters.
Before you start to act, you need to be aware of the risks and prepare the workplace. The process requires care, because inside the case there are fragile plumes and components, damage to which can lead to complete failure of the device. In this article, we will discuss in detail each step, from the selection of components to the final assembly, so that you can successfully restore the functionality of your device.
It's important to understand that the Redmi 4X uses full bonding (OGS) technology, where the touch layer and the matrix are a single unit, which makes it easier to replace, because you don't have to mess with B-7000 glue to separate the glass, but you need to buy a whole module. Trying to replace only glass in the home without professional equipment (separator and laminator) is almost doomed to failure and death of the matrix.
Selection of spare parts and preparation of tools
The first and most critical step is to get a quality display module. The spare parts market is full of copies of different quality, and for Xiaomi Redmi 4X this is especially true. The original matrix has excellent color reproduction and bright colors, while cheap counterparts (copies) often have a dull picture, low resolution and quickly fail.
To perform a successful smartphone resuscitation operation, you will need a minimal but specific set of tools, without which the replacement process will become torture, and the risk of damage to the body or new parts will increase many times, and do not try to use knives or other sharp objects that can damage internal components or injure you.
- 🛠️ Set of screwdrivers: mandatory presence of cross PH000 and, preferably, a triangular screwdriver for screws inside the body.
- 🔥 Dryer or thermophen: necessary to soften the adhesive holding the display module in the frame of the housing.
- 💳 Plastic blade or mediator: for careful snapping of the plumes and separation of the module from the frame without scratches.
- 🧪 Isopropyl alcohol and suction cup: alcohol helps dissolve the remnants of glue, and a suction cup is needed for the primary screen tear.
⚠️ Warning: Do not use an open fire (gas stove or lighter) to heat the case. Local overheating can damage the battery, cause it to bloat or even ignite, and deform plastic frame elements.
Make sure you have a screw folding tank on hand. Redmi 4X uses screws of different lengths, and if you mix them up when you build them, you can punch through the motherboard, which will lead to irreversible consequences. Organize the space so that nothing gets lost or falls into hard-to-reach places.
Rear cover removal and preparation for disassembly
The process of dismantling Xiaomi Redmi 4X begins with the removal of the rear metal cover. Unlike many modern smartphones, here it is not removable in the usual sense, but is fixed by screws and adhesive layer around the perimeter. First you need to unscrew two screws located at the bottom of the body, next to the charging connector, which can be hidden under decorative plugs or be visible immediately.
After removing the screws, you need to carefully warm up the perimeter of the device. The glue that fixes the lid becomes elastic when heated. Use a dryer at medium power, evenly warming the ends for 2-3 minutes. Do not hold the hair dryer too long at one point so as not to overheat the matrix on the front side or the battery inside.
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Warm up the body evenly throughout the perimeter, paying special attention to the corners, as there the glue freezes most densely.
Then you go to the suction cup and the plastic blade, and you attach the suction cup to the bottom of the back cover, pull it back, create a gap, and you insert the blade, and you drive the tool along the perimeter, gradually snapping the lid, and inside you'll see a metal screen covering the main board and the battery, and a plume connecting the main board to the daughter (where the charging connector is).
Pay special attention to the plume that runs from the bottom board to the main board. It passes under the battery and is often glued. If you take the back cover carelessly off, this plume can be easily broken. If the lid is removed tightly, add a little more heat, but do not use excessive force. Once the plume is unplugged, the lid will be completely free.
| Phase | Tool. | Risks. | Council |
|---|---|---|---|
| Removal of screws | Screwdriver PH000 | Slicking hats | Use a high-quality magnetic screwdriver |
| Heating. | Fen | Battery overheating | Warm for no more than 3-4 minutes, check with your hand |
| Autopsy | Suction + spatula | The plume rupture | Move slowly, from bottom to top |
| Shutdown | Tweezers | Connector damage | Pull strictly up behind the tongue |
Disconnecting the battery and removing protective screens
Once the metal cover is removed, you will see the inside of the smartphone, and the first thing you need to do before you unscrew any other screws is to turn off the battery. It's the golden rule of any electronics repair. Find the battery connector (usually located at the bottom or middle of the board) and gently disconnect it by pulling a plastic blade or nail.
Why is this so important? Accidental closure of the contacts of the display connector or other components when the battery is turned on can lead to a short circuit and combustion of the power controller on the motherboard. In the Redmi 4X, the layout is quite dense, so the risk of hitting something extra is high. Once the battery is turned off, the device is completely de-energized and safe for further disassembly.
☑️ Safe disassembly
So you can now start removing the metal shield that covers the main board, and it's locked with multiple screws around the perimeter and maybe one in the center, and you can unscrew them all and put them aside, and underneath the screen you'll see the motherboard itself, the cameras, the plume connectors, and the dynamic speaker.
The next step is to dismantle the speaker and the vibrator if they interfere with access to the display plumes, but in the 4X model it is often enough to simply unscrew the pinning strips of the plumes. Note the plume coming from the buttons and the lower board, it can pass under the board. Carefully disconnect all visible connectors associated with the display and touchscreen.
⚠️ Note: Xiaomi plumes are very thin and delicate. Don't pull the wiring, just the thickened connector. Damage to the tracks on the plume will lead to a broken touchscreen or display even after you've replaced it.
Replacement of the display module and re-painting of the frame
We've come to the most critical moment, which is to replace the display itself. In the Xiaomi Redmi 4X, the display module is glued into a plastic frame, which in turn is inserted into the metal case. To remove the old broken screen, it needs to be heated again. Put the device face up and warm up the screen with a hairdryer for 3-5 minutes.
Use a suction cup to lift the module, and a thin line or a special string to cut through the layer of glue around the perimeter. Move the string from side to side, gradually deepening. When the module is separated from the frame, disconnect its plumes from the motherboard (if you haven't already done so in the previous step) and remove it completely.
Now you have to prepare a new frame. Often new modules are sold with a frame, but sometimes the frame goes separately or you need to reposition. If you buy a module without a frame, you have to carefully peel the old display from the plastic base, clean it of glue residues with alcohol and paste a new one. However, it is easier and more reliable to buy a module assembled with a frame.
What to do with the B-7000 glue?
Put the new module in a frame, making sure it sits tightly and without distortion. Connect the display and touchscreen plumes to the motherboard before you click. Remember the pressurized metal slats that lock the connectors — without them, contact can disappear from vibration. Until you stick the module dead, first check the performance.
Device assembly and initial start
Before the final assembly, you need to run a test run. Connect the battery and press the power button carefully. If the screen catches fire, the image comes up and the sensor is running, you're on the right track. Check the front camera, the speaker and the proximity sensor, because they're in the vicinity of the display plumes.
If everything is working properly, you can start the final assembly. Lay the plumes carefully so that they do not clamp. Insert the display module into the metal body until the characteristic click around the perimeter. Make sure there are no gaps between the plastic frame and the metal of the housing.
Put the motherboard's metal shield back in place and twist all the screws. Connect the lower board plume to the main board. Make sure the connector is flat.