How to change the screen Xiaomi Redmi 4 Pro with your own hands

The situation when the beloved Xiaomi Redmi 4 Pro (also known as Redmi Note 4) falls and breaks, unfortunately, is familiar to many owners.Cracked glass or ink stripes on the matrix is not just an aesthetic defect, but also the risk of further damage to the touch layer.Self-replacement display allows you to save a significant amount compared to the services of the service center, but requires accuracy and understanding of the device of the smartphone.

Before you start disassembling, it is important to realize that the display module in this model is often sold in a framed assembly, which makes it much easier. If you decide to change only the glass or matrix separately, the process will become much more complicated and require specialized equipment such as a separator and a press. In this article, we will discuss the most secure and effective method of replacing the full module.

You don't need to be a professional engineer to do this, but instrumental training is crucial. Lack of the right screwdrivers or using sharp metal objects instead of mediators can damage the plumes or body. Carefully study the sequence of actions to avoid common mistakes beginners make when repairing electronics.

Diagnostics and selection of components for replacement

The first step is to determine exactly what type of damage is involved. If only the glass is broken and the image is clean and the sensor is working, theoretically you can only replace the top layer, but in practice it is cheaper and more reliable to buy an assembly for the Redmi 4 Pro: OEM-Matrices (quality copies) and original displays (original), which are often labeled by the manufacturer, the difference in color reproduction and brightness can only be noticeable when compared directly, but the original is always preferred.

Note the design of the module being purchased. There are framed and frameless versions. For self-repair, it is strongly recommended to choose a framed module, since re-painting the old display into a new frame requires work with aggressive chemicals and precise positioning. Buying a finished assembly minimizes the risks of distortion and dust entering the glass.

When ordering a spare part, be sure to check compatibility by model number. Xiaomi Redmi 4 Pro is based on a Helio X20 processor, and while the physical connectors may match other versions of the Note 4, the software part may differ. The inappropriate display may not turn on or work with image artifacts. Always require a photo of the plume and connector from the seller before buying.

It is also important to check the performance of the new part before the final assembly, connect the display plume to the motherboard and gently apply power without fixing the module in the case, this action will ensure that there are no broken pixels and correct operation of the touchscreen, saving time for re-disassembly in the event of a marriage.

Tools and workplace preparation required

You can't have a good repair without the right tools. You'll need a set of precision screwdrivers to work with the Redmi 4 Pro, because the screws in this smartphone are very small and have different sizes. The focus is on the PH000 and PH00 cross screwdrivers, and maybe the Torx T5 star for some modifications. Using an inappropriate sting can rip off the screw hats, which will turn a simple repair into a complex puzzle.

Plastic tools are critical to opening the case and unsticking the elements safely. Metal blades can damage plumes or shorten contacts on the board, so only use plastic mediators and a suction cup. Also prepare tweezers with curved ends for easy grip of small screws and plumes in hard-to-reach places.

The organization of the workspace is the key to success. Put a soft cloth or a mat on the table so that small screws do not roll and get lost. It is recommended to use a magnetic mat or a piece of paper with a drawn circuit, where you will lay the screws in the order of their twisting, this will help to avoid a situation where after assembly there are unnecessary parts.

⚠️ Warning: Before starting any work be sure to turn off the smartphone! Attempting to disconnect the plumes of the display or battery when the device is turned on is guaranteed to cause the power controller or backlight on the motherboard to burn.

The process of disassembling the smartphone Xiaomi Redmi 4 Pro

Starting the disassembly with the extraction SIM-It's standard, but it's often forgotten when you try to force the back cover off, and then you have to remove the two screws that are next to the charging connector at the bottom of the case, and after they've been unscrewed, the lid is still held on the plastic latches around the perimeter.

To remove the back cover, use a suction cup, glue it to the bottom of the smartphone, and gently pull it up while simultaneously passing a plastic blade along the junction of the case. Do not use excessive force: if the lid does not lend itself, check if all screws are twisted, and warm up the edges of the body with a hairdryer to soften the glue. Move around, gradually snapping the locks.

When you take the lid off, you'll see the inside of the device, and the first thing you need to do is unscrew the screws that lock the plastic lining, the battery cover, the bottom board, and they're usually around. 10-12 Note that the screws can be of different lengths, so keep an eye on their location.

Now, the critical moment is to turn off the battery, find the battery connector on the motherboard and gently disconnect it with a plastic blade, and then you can safely work with the other components, and then unscrew the metal plate that protects the display plumes, and turn off the main screen plume.

Dismantling of the old display module

Once all communications are turned off, you can start removing the display itself. In the case of the Redmi 4 Pro, the screen is glued to a plastic frame around the perimeter. It will require heating to remove it. Use a hair dryer to warm the front panel for 2-3 minutes, directing the flow of hot air evenly along the edges of the screen.

After heating, insert a thin plastic card or a special string between the frame and the display. Move slowly, trying not to damage the side edges of the frame. If the module is tight, add more heat. Your goal is to separate the adhesive layer that holds the glass. In some cases, the display can be additionally fixed with screws under the decorative elements, check the perimeter.

Cleaning the frame of the residue of old glue is an important step: use special glue removal fluids (B-7000 remover) or carefully scrape the residues with a blade, trying not to scratch the plastic. The surface must be perfectly clean and fat-free, otherwise the new screen will lie unevenly or will recede over time.

⚠️ Warning: When heated with a hairdryer, do not keep the jet of hot air in one point for too long, especially in the battery area. Lithium polymer batteries are sensitive to overheating and can swell or catch fire at higher temperatures. 60-70 degree.

Installation of a new screen and assembly of the device

Before you finally install the new module, apply a thin layer of special adhesive (such as the B-7000 or T-7000) to the frame of the new display or to the cleaned frame of the case. Do not use superglue (cyanacrylate) - it dries instantly, leaves white marks and makes the structure brittle. The specialized adhesive remains elastic, which is important for quenching vibrations.

Carefully put the new module in place, combining all the holes and slots. Press the screen evenly around the perimeter so that the glue spreads. Now you need to lock the display plume in the motherboard connector until the characteristic click. Make sure that the plume lay flat, without cracks, and close it with a metal protective plate, twisting the screws.

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Apply the glue in a thin strip, receding 1-2 mm from the edge of the frame. If the glue leaks out, it will be difficult to remove it from the new glass without leaving a stain. You can remove the excess with a toothpick before drying.

Connect the battery and check the smartphone without sticking the back cover. Check the brightness, colors, and multi-touch performance (e.g., in the Sensor Test app). If everything works correctly, you can start the final assembly: install a plastic lining, screw all the screws, and snap the back cover.

For reliable fixation of the back cover, it is also recommended to use a little glue or special adhesive tapes (double-sided tape), since plastic latches wear out over time and may not hold the cover tightly, which will protect the insides of the smartphone from dust and moisture.

Common Errors and How to Resolve Them

One of the most common problems after assembly is the appearance of a “white spot” or uneven backlight in the corner of the screen, which indicates that when installing the module, an excessive mechanical press was applied to the matrix, or a motley was hit by it, in which case a neat massage of the screen (without fanaticism) sometimes helps, but most often requires re-disassembly.

If the sensor is not working properly (push skips, phantom clicks), check the quality of the plume connection, it may not be deep enough in the connector or contaminated. Also, the problem may be the lack of grounding: make sure that all metal plates are screwed into their places, as they often act as contact points for the touchscreen.

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The quality of the repair depends on 90 percent cleanliness and no dust between the layers of the display, and any speck of dust that falls under the matrix will be visible as a black dot forever.

Another common mistake is losing small screws or confusing them. A longer screw twisted into a hole for a short one can punch a board or hit the screen, creating pressure and image defects. Always check the screw layout if you have kept track of them.