Xiaomi Redmi Note 4x is one of the most reliable devices in the company’s history, but even the most durable equipment is subject to physical damage. Cracks on glass, battery wear or failure of the charging port are typical problems that owners of this device face after years of active use. Self-disassembly can seem a frightening procedure, but with a minimum set of tools and a clear algorithm of actions, this task is quite solvable at home.
Before starting the dismantling, you need to objectively assess the condition of the device and decide whether to repair. If the screen is broken, but the sensor is working, it may be enough to replace only the glass, which requires specialized equipment. However, in most cases, especially if there are black spots on the display or complete inoperability of the touchscreen, you need a complete replacement of the module assembly. It is important to understand that the sealability of the case after opening will be broken, and you will no longer have to rely on factory dust protection.
In this article, we will take a closer look at the complete dismantling of the Xiaomi Redmi Note 4x, focusing on the subtleties of disconnecting plumes and carefully handling fragile components, learn which tools are really necessary and what you can do without, and get answers to the frequently asked questions that beginners in the world of mobile repair, the willingness to act slowly and carefully is the main key to success in this business.
Preparation of the workplace and necessary tools
The quality of the repairs begins long before you pick up the screwdriver. The first step is to create a comfortable workspace that is well lit and protected from static electricity. The ideal option is an antistatic mat, but in extreme cases you can use a clean wooden surface covered with cotton cloth. You can not work on fuzzy carpets or synthetic materials, because static discharge can instantly disable the motherboard.
As for the tools, you will need a specific set for the Redmi Note 4x, since the design of the smartphone involves the use of screws of different types. The main tool will be a cross screwdriver of the size of PH00 or PH000, which is necessary for twisting the main screws of the body and internal mounts, and the presence of a plastic blade (mediator) to open the case and snap the plumes so as not to damage their metal contacts.
⚠️ Warning: Metal tools such as needles or blades are strictly prohibited when working with the battery.Puncture of the lithium polymer battery will lead to instant fire and possible explosion.
To work with small screws that are easily lost, it is recommended to prepare a magnetic tray or a sheet of paper divided into sectors, where you will fix the stages of disassembly. This will help to avoid a situation where after assembly there are unnecessary parts. In addition, tweezers with curved ends should be at hand to extract small elements from hard-to-reach places of the case.
☑️ Disassembly tools for Redmi Note 4x
Primary dismantling: removal of the back cover and side frames
The process of dismantling Xiaomi Redmi Note 4x It starts with removing the metal back cover, which is attached to a two-part glue and is fixed by screws under plugs. Unlike many modern smartphones, there are no hidden screws under the tray. SIM-But the glue that's glued to the lid hardens over time, requiring preheating to soften the adhesive layer.
Use a hair dryer to warm the perimeter of the back panel evenly for 2-3 minutes. The temperature should not exceed 80-90 degrees Celsius, so as not to damage the internal components or the battery itself. After heating, insert a plastic card or mediator into the junction between the frame and the cover in the lower corner and carefully guide the tool along the perimeter, gradually snapping the latches.
Once the lid is removed, you will see the inside of the smartphone, protected by a plastic frame that hides the main components. At this point, it is important not to make excessive efforts to break the plastic frame locks. Under the frame are the screws that hold the main modules and the plumes that connect the boards.
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If the back cover doesn't lend itself, don't try to tear it off by force. Reheat the edges with a hairdryer for another minute, paying special attention to the corners.
Power outage and removal of protective screens
The most critical aspect of any electronics disassembly is to turn off the device in a timely manner. Immediately after removing the decorative frame, you need to find the battery connector and disconnect it from the motherboard. In the Redmi Note 4x, the battery connector is located at the bottom of the board and is often closed with a metal plate that is mounted with screws.
Carefully unscrew all visible screws that fix metal shielding screens. After removing the metal plates, access to the main plumes will open: display, touchscreen, front camera and lower charging plume.
To turn off the plumes, use a plastic blade or nail, putting the connector vertically upwards. It is forbidden to pull the wires themselves or bend the plume at an acute angle, as this will break the current tracks. First disconnect the battery, and only then start to turn off the remaining components.
| Component | Location. | Type of attachment | Features of withdrawal |
|---|---|---|---|
| Battery | The bottom of the fee | Pressure plate | First to turn off |
| Display plume | Top of the pay | Clamp or connector | It requires care. |
| Main camera. | Centre/Top of the fee | Pressure plate | Fragile lens |
| Charging charges | Bottom of the hull | Screws and connector | Complex geometry |
Removal of the battery and replacement of the batteries
The battery in Xiaomi Redmi Note 4x is glued to the body on double-sided tape, which makes it much more difficult to remove it without the risk of deformation. Under no circumstances do not try to tamper with the battery with metal objects or apply force to the center of the cell. Deformation of the lithium polymer cell can lead to short circuit and thermal acceleration.
For safe extraction, it is recommended to use the dryer again, warming the battery area through the back cover (if it is removed) or directly the body if the battery is already available. The optimal heating temperature is about 60-70 degrees. After warming up, use a special suction hood or, in extreme cases, a plastic card, gently slipping it under the battery from the ends.
When installing a new battery, make sure the contact area on the case is cleared of residues of old glue.The new battery should sit tightly in the niche, but not be bloated.If you notice that the new battery has signs of bloating, immediately stop using and contact the supplier as this is a defect or violation of storage conditions.
⚠️ Warning: Do not leave your phone with the battery disconnected for a long time. The power controller can reset settings, which will lead to the inability to charge without a special programmer.
Replacement of the display and touch screen: the subtleties of working with the module
Replacing the screen with the Redmi Note 4x is one of the most common reasons for disassembly. The screen here is a single module consisting of a matrix, touch screen and frame, which makes it easier to replace, but requires accuracy when transferring some elements. The old module must be completely dismantled, disconnecting all the plumes and twisting the mounting screws around the perimeter.
When installing the new module, pay attention to the purity of the inner surface of the glass. Even the smallest speck of dust caught between the new glass and the matrix will look like a black defect. Blow the insides of the case with compressed air or use a special sticky tape to remove dust before the final assembly.
The touchscreen plume and the matrix plume connect to different connectors on the motherboard. It's important not to confuse them, because they can fit physically, but they have different electrical wiring. The touchscreen plume in the Redmi Note 4x is marked "TP," and the matrix plume is marked "LCD," which helps avoid fatal assembly errors.
What to do if the new screen is not working?
Device assembly and final functional check
The assembly is done in the exact opposite order, but there are some nuances: first of all, you need to check the health of all systems before you twist all the screws and glue the lid, plug the battery, the display plume and the touch screen, then press the switch on.
If the phone is on, check the sensor, the speaker, the vibrator, the cameras and the proximity sensors, make sure the screen is flat, color-free, and only after successful testing can you start installing metal screens and twisting the screws.
When twisting the screws, don't drag them. The plastic they screw into can crack, which will cause the internal components to dangle. The screws should twist easily, to a light stop. The back cover should be cleaned of old glue before installation and a new layer of B-7000 or similar adhesive is applied to ensure tight fit.
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Final check of all functions of the device before full sealing of the case is a mandatory stage, which will save time for re-disassembly in case of defection of a new part.