Replacement of the screen Xiaomi Redmi 4A: the full guide

Xiaomi Redmi 4A is deservedly considered one of the most reliable budget players of its time, but even durable devices are not immune to falls. Broken glass or black stripes on the matrix are a common problem faced by owners of this model. Self-replacement of the display module allows you to save a significant amount, since the cost of services in service centers is often comparable to the price of the phone itself.

In Redmi 4A, the screen is a single module where the sensor (touchscreen) and the matrix (image output) are glued together in the factory, and changing them separately at home is extremely difficult and impractical without special equipment, you will need a new module, a set of tools and, most importantly, patience.

In this article, we will discuss the process of dismantling an old panel and installing a new one. We will pay special attention to the nuances of working with adhesive bases and plumes, since these are the moments that most often cause difficulties for beginners.

Diagnosis and selection of components

Before you order parts, you need to make sure you're damaged, because if you see cracks on the screen, but the image is clear, and the sensor responds to touch, you can theoretically replace only glass. But for the Redmi 4A, it's easier and more reliable to buy a full module assembled, and that will save you from having to use a separator, LOCA fluid and UV lamp.

When choosing a new screen, pay attention to the type of matrix. IPS-panels that provide good viewing angles; cheap analogs can have distorted color reproduction or low brightness; original module or quality copy of class AAA+ — The best choice for extending the life of the gadget.

⚠️ Attention: Cheap screens often have thicker protective glass, which may cause the smartphone frame to not stand tightly, forming slits.Always check the geometry of the part before final assembly.

It's also worth checking the condition of other components. Often, when you hit hard, it's not just the display that's affected, but also the plumes or the internal mounts, and if the body is severely deformed, it's also better to replace it so that the new screen doesn't burst from the voltage when you install it.

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Buy a module with a frame right away.This makes it easier to replace, as you don’t have to carry the speaker, board and buttons from the old case, which reduces the risk of damage to small parts.

Tools and workplace preparation required

You can't have a quality repair without the right tools. To work with the Xiaomi Redmi 4A, you'll need a specific kit that you can build yourself or buy a ready-made repair kit. Lack of the right tools can lead to damage to the body or even injuries.

Here is a list of what to do before starting the showdown:

• 🛠️ Set of screwdrivers: mandatory presence of cross PH000 and a small flat screwdriver.
• 🔥 Dryer or thermophen: Necessary to soften the glue holding the back cover.
• 🎴 Plastic cards or mediators: for neat opening of the body without scratches.
• 🧲 Magnetic mat or organizer: to avoid losing tiny screws of different sizes.
• 🧴 B-7000 glue or finished adhesive frames: for fixing a new display.

Organize a workspace. The desk should be clean, well-lit and free of unnecessary objects. Small parts, such as screws or pieces of plastic, are easily lost on the carpet or floor, so it is better to cover the surface with white paper.

The process of dismantling the back cover and battery

The Redmi 4A starts with the rear panel removed. Unlike modern monoblocks, the lid is removable, but it is planted on double-sided tape around the perimeter. Heat the edges of the body with a hairdryer to a comfortable hand temperature (about 60-70 degrees) to soften the glue.

Using a suction cup or plastic card, gently lash the lid in the area of the tray for SIM-You can move the card around the perimeter, you can slowly snap the latches, and when you take the lid off, you'll see the battery and the main board.

The next critical step is to turn off the power, find the battery connector on the motherboard and gently disconnect it, and turning off the battery is the first safety rule that prevents short circuits from working with other plumes, and then you can unscrew the screws that lock the plastic linings.

⚠️ Warning: Never try to disconnect the plume by pulling your fingers. Use a plastic blade to fit the connector vertically upwards, otherwise you can damage the contacts on the board.

When you turn off the plumes, remove the plastic lining that covers the bottom of the board, which is usually held on several screws and plastic latches. Be careful: screws may have different lengths, remember their location.

Removal of the old display module

When the insides are open, you can start removing the screen itself. The display plume in the Xiaomi Redmi 4A is connected at the top of the motherboard. Carefully bend the protective metal plate, if any, and disconnect the main plume.

The module itself is glued to the plastic frame of the case. It will require heating again to extract it. Warm up the front of the phone with a hairdryer, paying special attention to the edges. Then, inserting a thin plastic card or a special knife into the gap between the screen and the frame, drive the tool around the perimeter, cutting the adhesive layer.

Act slowly and evenly. If you feel strong resistance, add heat. Sharp movements can cause shards of old glass to fall into the body, which will create additional cleaning problems. Once the glue is weakened, the module can be carefully removed.

After removing the old module, thoroughly clean the frame of the glue residue. Use isopropyl alcohol or a special solvent for the adhesive, but make sure that the liquid does not get on the speaker or charging connector. The surface should be perfectly smooth and fat-free.

Installation of a new screen and assembly

Before you finally install the new module, you should do a test connection: Put the new screen next to the phone, plug in the plume and battery, then turn on the device. Check the touchscreen, the presence of broken pixels and color reproduction. If all is well, turn off the phone and turn off the battery.

Apply the B-7000 glue thinly on the end of the new frame, or use a pre-made glue pad. Let the glue dry for 1-2 minutes until it's sticky. Carefully place the module in the frame, combining all the holes and protrusions. Press the perimeter lightly.

Now, put the device back together in reverse order: plug in the plumes, install the metal plates, screw up the screws. Pay special attention to the plume of the touchscreen and the display - they should sit tight until the characteristic click. The back cover is also better planted on a fresh layer of glue or double-sided tape.

After assembly, take your time to put on the case. Let the glue be fully polymerized for 12-24 hours. At this time, it is better to put the phone under a small load (for example, a couple of books) to ensure that the screen fits evenly to the frame.

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The quality of the final build depends on the thoroughness of cleaning the frame from the old glue, even microscopic residues can create a skew that will cause the new screen to burst at the first press.

Common Errors and How to Resolve Them

Even if you follow the instructions, beginners can make mistakes, and one of the most common is that the plume gets damaged when you install it, if the screen doesn't light up or the touchscreen doesn't work, don't panic, and 90 percent of the time, the problem is that the connector is not fully inserted.

Another common problem is the appearance of yellow spots or moires on the display, which may indicate too much pressure on the matrix at a certain point or the defect of the part itself, and dust may also enter between the layers of the screen if the assembly was carried out in a dusty room.

• 👻 "Sensor dead zones: check if the plume is transmitted by the body or screw.
• 🔋 Quick discharge: make sure that the side button plume does not close to other contacts.
• 📉 Dim backlight: check the light connector on the motherboard.

If you notice that the screen is moving away from the body, don't try to glue it with superglue. Cyanacrylate adhesives emit fumes that settle on the matrix and create an irremovable white film. Use only specialized electronics formulations.

⚠️ Attention: Using aggressive chemicals to clean the frame can melt the plastic structure of the case.

Frequently Asked Questions (FAQ)