Replacement of the display Xiaomi Redmi 4X with their own hands

Smartphone Xiaomi Redmi 4X deservedly considered one of the most reliable models of the budget segment, but even durable devices have falls that lead to damage to the matrix. Broken glass or lack of image is not a reason to carry the gadget to the service center, where the cost of work can be up to half the price of the device itself in the secondary market. Self-replacement of the display module allows you to save money and return the device to its original appearance without overpaying the masters.

The recovery process requires precision, a basic set of tools, and an understanding of the internal architecture of the smartphone. In this article, we will examine in detail each step of dismantling damaged components and installing a new part, paying special attention to the subtleties of working with fragile plumes and adhesive body.

Before starting work, you need to prepare a workspace with good lighting and make sure you have all the necessary tools for delicate electronics at hand. Safety is a top priority, so any actions with conductive cells should be performed only after the battery is turned off.

Tools and workplace preparation required

To successfully carry out the repair, you will need a specialized tool that will provide access to the insides of the device without damaging the plastic latches and body.The standard home craftsman set may not be suitable, as the screws in Xiaomi smartphones often have a specific hat shape.

Special attention should be paid to the quality of heating equipment if it is needed to soften the adhesive, although in the 4X the main fastener is mechanical. Using the wrong tools can lead to licking of the screws, which will turn a simple repair into a difficult engineering task to drill the fastener.

• 🔧 A set of screwdrivers with Phillips and Torx bits (usually a size is required) T5 or T6 hull-rotor).
• 🎴 Plastic blade or mediator for neat opening of the body without scratches.
• 🌡️ Hair dryer building or household heating pad for pre-heating (optional, if the glass is strongly glued to).
• 🧲 Magnetic mat or container for sorting screws of different sizes.

It is important to check the compatibility of the purchased display module with your motherboard revision. Sometimes manufacturers use different connectors or the location of the plumes, so the article of the part must be completely identical to the original or proven counterpart.

⚠️ Warning: Before starting disassembly, be sure to completely turn off the smartphone. Working with a connected battery under voltage can lead to a short circuit and failure of the power controller.

Dismantling of the back cover and protective elements

The disassembly process begins with the removal of the SIM card, as access to one of the screws can be blocked by a tray. Unlike many modern models, the Redmi 4X has a removable back cover, which greatly simplifies access to the main board and battery.

Carefully tuck the lid with a nail or plastic spatula in a special recess, usually located in the lower corner of the case.The movements should be smooth so as not to break the plastic fixtures, which become brittle over time.

Once the lid is removed, you will see the internal layout of the device, protected by an additional plastic frame, which is fixed by several screws that must be twisted counterclockwise, taking care not to damage the thread.

• 📱 Remove the tray for SIM-Memory cards before starting work.
• 🔩 Unscrew all visible screws on the back panel (usually near them). 10-12 piece).
• 🛡️ Remove the plastic lining that hides the battery and display plumes.

At this stage, it is important not to put too much effort into it. If the frame is not removed, check if all screws are twisted, as one missed fastener can cause a crack in the plastic.

Disconnection of the battery and removal of the main modules

The most critical stage of repair is to properly shut down the power supply. In the Redmi 4X model, the battery connector is located directly under a protective metal plate or plastic cover covering the main plumes.

Use a plastic blade to disconnect the battery plume from the motherboard, and the movement should be directed upwards from the board so that the connector contacts are not damaged, and only then can you safely touch other components of the system.

Then you have to disconnect the plumes of the display and the touchscreen, which can be combined into one wide connector or divided into two separate cables depending on the version of the screen, carefully put the locks on and remove the cables from the connectors.

Procedure for disconnection:


Battery Connector (Battery Connector)




Main display plume (Display FPC)




3. Touch FPC (touch FPC) - if a separate

Once all communications are disabled, you can start removing the motherboard itself if it interferes with access to the display mount, or immediately proceed to disassemble the old screen, often requiring the board to be removed completely or moved aside by first unscrewing additional screws.

⚠️ Warning: Never pull the plumes. If the connector is not removed, check if there is an additional locking clamp or a clamping bar on it.

Replacement process of the display module

The old display module in Redmi 4X is usually attached to double-sided tape around the perimeter and, in some cases, to additional screws at the bottom.It may require careful flexing of the edges of the frame or heating the lower part of the body.

The new screen should be checked for protective film on the contacts and cleaned of dust before installation. Make sure that the frame of the new module does not have casting defects that can prevent a tight fit to the case of the smartphone.

The new module is installed in reverse order. First, carefully insert the plumes into the corresponding connectors until the characteristic click or stop. Then press the module to the housing, ensuring that the adhesive base fits evenly.

If the new screen comes without adhesive base, use a special B-7000 glue or double-sided tape for the screens. Apply the glue with a thin layer and let it dry a little before the final assembly so that the excess does not squeeze out on the matrix.

Device assembly and initial start

Before the final screw twist and the lid is snapped, you must perform an initial system health check. Connect the battery plume and press the power button to make sure the image appears.

Check the touchscreen across the screen, including corners and edges where low-quality copies often have dead zones, and make sure the colors are displayed correctly and there are no broken pixels or stripes.

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If the screen is working, but the touchscreen does not respond, try to turn off and reconnect the touchscreen plume, checking the purity of the contacts.

If all functions are working properly, turn off the battery again (for safety), put all the plumes carefully into the channels intended for them and close the protective plate. Only then you can twist the screws of the case and install the back cover.

The final assembly requires care: make sure that no wiring is hit by the screw and all connectors sit tight. Swirl the screws cross-cross to ensure that the pressure is evenly distributed on the body.

⚠️ Warning: Do not pull over the screws of the plastic case. Excessive force can lead to cracks around the fastening holes.

Diagnostics and calibration

After assembly, there may be situations where the device behaves unstable, often due to loosely inserted plumes or software failures that require resetting or calibrating the sensor.

To check the sensor in the Xiaomi engineering menu, you can use a special code. Enter the ##6484## command in the dial menu to enter CIT mode (Customer Inspection Test), where all components are available, including multi-touch.

In some cases, a software-based touchscreen calibration is required, especially if only the glass part has been replaced or a non-original module has been used, and this can be done through an engineering menu or special applications from the Play Market.

If after replacing the display, the smartphone stopped seeing SIM-map or sound is lost, check if you have touched other plumes during installation, such as an antenna cable or a lower speaker connector, which are often located in the immediate vicinity.

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A high-quality replacement of the display returns the smartphone 95% of its original functionality, making the device suitable for further use for several years.

Frequently Asked Questions (FAQ)