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

Xiaomi Redmi 4X has proven to be a reliable budget device, but falls and bumps often cause a broken display. Restoring the health of the gadget through a replacement screen module is a procedure available not only in service centers, but also at home with accuracy. The right approach to dismantling will keep the housing tight and avoid damage to internal components.

Before we start, it's important to understand that in modern smartphones, the display and the touchscreen are often a single glue module, which makes it easier to replace, but requires care when working with thin plumes. A quality copy or original spare part will return the device to its former brightness and responsiveness of the sensor.

To complete the repair, you will need not only a new display, but also a set of special tools. Lack of necessary tools can lead to scratches on the frame or damage to the motherboard. It is critical to fully discharge the battery before the device is turned off before work begins to minimize the risk of short circuit when the battery plume is turned off.

Tools and workplace preparation required

The first step to a successful workspace is to have a clean desk with good lighting so that small screws don't get lost in the dust, and using a magnetic mat or screw sorter will help you avoid confusing the different lengths of the fixtures, as the Redmi 4X uses screws of different calibers.

The basic toolkit should include special suction cups, mediators (plastic blades) and a set of screwdrivers. Metal tools are not recommended, as they can easily damage fragile internal components or scratch the aluminum body.

Be sure to prepare the following tools:

• 🔧 Set of screwdrivers (cross-haired) PH000 flat).
• 🧲 Magnetic mat or screw sorting container.
• 🔥 Hair dryer construction or household (for heating glue).
• 📱 Plastic mediators and sucker.
• 🧴 Isopropyl alcohol and glue B-7000 (analogue).

⚠️ Note: Using a regular household hair dryer may not be effective enough as it does not develop a temperature higher 60-70 degrees required to soften the factory glue.

Removal of the back cover and battery

Disassembly begins with the removal of the rear cover, which in the Xiaomi Redmi 4X model is non-removable and glued around the perimeter. Carefully warm the edges of the body with a hairdryer, evenly distributing heat so as not to overheat the display matrix on the front side. Movements should be smooth, without sharp jerks that can lead to cracks in the glass.

After warming up, insert the suction cup into the bottom of the lid, pull up slightly, and insert a thin mediator into the gap. Swipe the tool along the perimeter, gradually cutting the adhesive layer. Don't try to open the lid completely at once, first go around the entire circuit, freeing the latches.

When the lid is removed, you need to access the battery, and in this model, the battery is covered with a plastic lining that attaches to the screws and glue, unscrew the visible screws, then gently tuck the lining with the mediator, and underneath it you will see the battery plume, which you need to turn off first to de-energize the system.

To extract the battery itself, use a plastic card or a spatula. Push the battery from the bottom, trying not to damage the shell with sharp objects. If the battery is sitting tight, you can warm the area below it slightly, but very carefully so as not to damage the display on the back side.

Dismantling the old matrix and plumes

Once the battery is removed, you can access the bottom of the case, where the display plume and the connection connectors are located. Carefully unscrew the metal shield covering the connectors, underneath which are the main display plumes and possibly additional control button plumes.

Turning off the plume is a delicate process. Use a plastic blade or nail to lift the connector upwards. You can't pull the plume itself, because it can break. If the connector has a lock, it must be bent upwards beforehand.

Now you have to separate the display module from the frame. In Redmi 4X, the screen is glued into the frame around the perimeter. Repeat the warm-up procedure on the front, but be extremely careful with the temperature so that the plastic frame does not deform. Gradually, as you put the mediator on, release the module from the glue.

When the module is free, check the contact areas on the board. If they have oxides or contaminants, gently wipe them with a cotton swab dipped in alcohol. Clean contacts ensure that the image will work smoothly after assembly.

Installation of a new display module

Before installing a new module, you need to transfer some elements from the old broken screen, if they do not come with a new spare part. Most often it is a speaker, a button plume and sometimes a camera if it is structurally fixed on the module. Carefully inspect the configuration of the new spare part.

Apply a thin layer of B-7000 glue to the frame of a new module or to the body of a phone, the glue should lie uniformly thin strip, without bumps and tears, the glue will then be difficult to remove, and they can stain the insides of the smartphone.

You can frame the module with a tight perimeter press, make sure it's flat and it doesn't protrude anywhere, and you can plug the plume into the motherboard, put the connector all the way to the point, pointing at the guides, and press it with your finger to fix it.

So, take your time to twist all the screws at once. First, check the touchscreen and the images, and you can temporarily plug the battery in and turn on the device, and if the picture is flat, spotless, and the sensor responds to touches all over the area, you can continue building.

Assembly of the case and calibration of the sensor

Once you've done a successful test, put the battery back in place, and if the old battery has lost capacity, it's the perfect time to replace it with a new one, glue it to double-sided tape so it doesn't hang around inside the case when you're in use.

Place a plastic lining over the battery and fasten all the screws. Pay attention to the length of the screws: longer screws are usually screwed into corners or special indentations. Rotating screws can damage the plastic or threads.

The final step is to glue the back cover, put the glue on the end of the case, put the lid on, and press it tightly, and for better fixation, you can put the phone under a small load on the back. 15-20 minutes, previously protecting the screen with a soft cloth.

After assembly, you may need to calibrate the sensor, especially if you notice a shift in touch points. The MIUI engineering menu has a built-in test to help check and calibrate the touchscreen. Enter the ##6484## code in the dial menu to enter the test mode.

Common Errors and How to Resolve Them

One of the most common mistakes is that the plume is damaged when you install it, and if you see cracks or cracks on the plume, it's almost impossible to repair it, you'll need to replace the module. You'll only work with plastic tools and in good light.

Another problem is the appearance of yellow spots or uneven backlights, which can be due to overheating when taking off an old screen or factory defects of a new part, and stains can appear if dust or villi are trapped in the matrix during assembly.

⚠️ Warning: If you see dead zones on the sensor after assembly, try recalibrate touchscreen through the engineering menu. In rare cases, flashing the device helps, but most often it is a sign of a physical defect in the touch layer.

Sometimes users forget to remove the protective film from the inside of the new display, which causes rainbow sliding and decreases brightness. Always check for these films before final assembly.

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Use isopropyl alcohol to remove the residue of old glue from the frame, which evaporates quickly and leaves no trace, unlike water or conventional cleaners.

FAQ: Frequently Asked Questions

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The main difficulty of replacing the screen with the Redmi 4X is the careful removal of the back cover without damage, since it is glued around the perimeter and requires uniform warming.