Replacement of the screen Xiaomi Redmi 7A with their own hands

Broken display on the smartphone is not only an aesthetic problem, but also a serious obstacle to comfortable use of the device. Xiaomi Redmi 7A, despite its budget, is equipped with an IPS-matrix, which, when handled carefully, serves for a long time, but an accidental fall on asphalt often leads to cracks in glass or stains. Self-replacement of the screen allows you to save a significant amount that would have to pay in the service center for the work of the master.

The repair process doesn't require superhuman skills, but you'll need patience, a firm hand, and a dedicated tool. In this article, we'll go through every step of the way, from the workplace to the final touchscreen check, and it's important to understand that the display module in this model is most often framed, making it much easier to replace.

Before you start dismantling, make sure you have a compatible part for your modification. The parts market is full of copies of different quality, so it is worth choosing trusted suppliers. If you are not confident in yourself or are afraid of damaging plumes, you better trust the professionals, but if you decide to act yourself, follow the instructions below.

Diagnosis and selection of components

The first step is to determine exactly what the fault is, if you see cracks on the screen but the image is clear and the sensor responds to touch, maybe only the glass is damaged. However, in the case of the Redmi 7A, replacing one glass at home is almost impossible without professional separation equipment, so the best solution is to buy a display module assembled.

When choosing a part, pay attention to the color of the plume and the location of the connectors. Original components usually have the markings corresponding to the model code. Cheap counterparts can differ in color reproduction or have a less sensitive touchscreen. For the Redmi 7A, it is critical that the module is pre-installed, since gluing the old display to a new frame requires experience and B-7000 glue.

Check the new screen before assembly begins, and then gently plug the plumes into the motherboard (without the board being screwed) and turn on the phone. If the image is clean, without stripes or broken pixels, and the touchscreen responds throughout the area, the detail is good.

⚠️ Warning: Do not buy modules marked "Refurbished" or "restored" if you want to get original image quality.

The cost of the original module can be higher than the cost of a used phone in the secondary market, so sometimes you have to consider buying a donor. This is especially true if your device has other hidden defects that you have not yet discovered.

Tools and training required

You can't have a good repair without the right tools. Don't try to open the case with a knife or screwdriver, because you risk damaging the plastic or, worse, piercing the battery. You'll need a special mobile device repair kit.

The basic list of tools includes:

• 🔧 Set of screwdrivers (mandatory presence of cross-haired) P2 and P0 small-rotor).
• 🧲 Magnetic mat or organizer for screws (so as not to lose them in the process).
• 💨 A hair dryer or thermophene (for heating glue).
• 🎸 Plastic mediators and sucker.
• 🧵 Thread (floss) or thin line (to cut glue under the screen).

Also prepare isopropyl alcohol or a special liquid to remove the adhesive, which will be used to clean the frame from the residues of the old adhesive before installing the new module, the workplace should be well lit, and the surface should be clean and conductive.

The process of disassembling the Redmi 7A hull

Disassembly begins with turning off the smartphone and removing the tray SIM-In the Redmi model. 7A The back cover is plastic, and it's attached to screws and glue, and at the bottom of the device, near the charging connector, there are two visible screws.

After the screws are removed, the back cover must be unstick. Use a hair dryer to warm the perimeter of the cover for 1-2 minutes to a temperature of about 60-70 degrees. The plastic must not melt, it must become warm to the touch. Insert the suction cup into the bottom of the cover and gently pull up, while introducing a plastic mediator into the gap.

Move the mediator around the perimeter, trying not to touch the internal components. Be especially careful in the upper part, where the fingerprint scanner plume (if you have one) and connectors are located. Do not pull the lid sharply so as not to damage the flash plume or antenna.

When you take the lid off, you'll see a plastic pad covering the battery and the motherboard, which is also attached to the screws and glue, and you'll be able to unscrew all the screws you see carefully, and you'll be able to put a mediator pad on the pad, and underneath it, you'll see the motherboard and the display plumes.

Disabling plumes and retrieving boards

At this point, you have to turn off the battery, which is a critical step for the safety of the components, and find the battery connector and gently disconnect it with a plastic blade, and only after it's turned off can you work with other plumes.

Then disconnect the display plume and touchscreen, which are located next to the battery connector. Be very careful: these plumes are very thin and easily break when you move carelessly, and it is also recommended to turn off the bottom board plume (with a charging connector) to have more room to maneuver.

Now you can pull out the motherboard. You can unscrew all the screws that lock the board to the middle frame. 6-8 Once the screws are removed, the board should be easily raised, and you should keep it safe so that the cameras or other elements are not damaged.

Check the board for oxidation or damage. If you change the screen because of impact, other components may have been affected, and make sure that the connectors on the board are intact and have no signs of corrosion.

Replacement of the display module

The hardest part is dismantling the old screen, and if you bought a framed module, it's a simpler task, you have to unplug the old matrix from the plastic frame, and then use the hair dryer again, warming up the front of the screen (if it's still holding) or the edges of the frame.

Use a thin thread or line, stretch it between the screen and the frame around the perimeter, making sawing movements, this will cut the layer of glue without damaging the frame itself. After separating the old module, carefully clean the frame of the glue residue using alcohol and scraper.

Place the new module in the frame. Make sure it sits tight and flat. Apply a thin layer of B-7000 glue around the perimeter of the frame if the new screen does not have an adhesive preset. Let the glue dry slightly (2-3 minutes) before final installation.

Once you frame the screen, put it back together. Connect the display plumes, then the batteries. Turn on the phone without screwing the screws to check the sensor and the image again. If everything works, lock the board with screws.

Assembly and final inspection

The final assembly requires care. Make sure all the plumes are packed into their channels and not clamped. The motherboard should be flat, unskewed. Twisted all the screws, but don't drag them over so you don't break the thread in the plastic racks.

Apply a new layer of glue or use double-sided tape to fix the back cover, press the lid evenly around the perimeter and lock the phone with rubber rings for 15-20 minutes to polymerize the adhesive, which will ensure that the housing is tight.

After assembly, perform a full test of the device, check the brightness, multi-touch operation (draw circles in the gallery), the speaker and microphone, and make sure that the proximity sensor is working correctly during the call.

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Leave the phone with the lid pressed overnight under a light load (such as a stack of books) so that the glue finally grabs and the screen does not go away with time.

⚠️ Warning: If the screen is running after assembly, but there are dead zones or ripples, the plume may not be fully connected or damaged during assembly.

Successful screen replacement extends the life of your Xiaomi Redmi 7A for a few more years.This device is famous for its reliability, and high-quality repair allows you to use it as a main or phone.

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The main secret of success is not to rush when peeling off the screen and be sure to turn off the battery before working with plumes.

Frequently Asked Questions (FAQ)