How to replace the screen Xiaomi Redmi Note 7: the full guide

Smartphone Xiaomi Redmi Note 7, released in early 2019, has proven to be a reliable device with excellent value for money, but even the most durable gadgets are not immune to falls. Broken glass or damaged matrix module is one of the most common reasons for contacting service centers, but self-replacement can save the owner a significant amount of money. It is important to understand that the process requires accuracy, since the design of the case involves sticking the display around the perimeter, and not fixing screws, as in older models.

Before starting the dismantling, you need to assess the extent of damage: if the image on the screen is missing, but the sensor is working, or black spots and stripes are visible, most likely, the display module itself is damaged. In cases where the glass is broken, but the picture is clear and the sensor responds perfectly, theoretically you can only replace the glass, but in the home without special equipment (separator and laminator), it is almost impossible to do this without the risk of finishing the matrix. Therefore, the most rational and safe solution is to completely replace the module with or without a frame, depending on the spare part.

To successfully perform the operation, you will need not only a new part, but also a specialized set of tools, including heating appliances to soften the glue. Do not ignore the safety and rush, as careless movement of the screwdriver can damage the plumes or puncture the battery, which can cause fire. In this article, we will discuss each step of the work in detail so that you can confidently perform repairs and return your Redmi Note 7 a second life.

Tools and workplace preparation required

The quality of the repair depends on preparation, so the first step is to create a comfortable workspace with good lighting. You need a desk that does not have unnecessary junk, so that small cogs do not get lost among papers or other items. It is crucial to ensure that there is no static electricity, since the electronics of the smartphone are sensitive to discharges that can disable power controllers or touch screens.

The basic set of tools should include a hair dryer (construction or household at maximum capacity), a sucker, a mediator or plastic card, a set of screwdrivers (cross Phillips #00 and triangular), tweezers and isopropyl alcohol. The use of metal blades at the initial stage is strictly prohibited, as they are very easy to damage the glass or tear plumes if they pass close to the edges of the case. To fix the unscrewed screws, it is recommended to use a magnetic mat or special organizers with signatures, so that there is no confusion with the length of the fastening elements.

⚠️ Warning: Before starting any work, be sure to completely turn off your smartphone. If the screen does not respond to touch, press the power and volume button (or only power, depending on the version of the software) on the 10-15 seconds before vibration or shutdown to avoid short circuit when the plumes are disconnected.

Special attention should be paid to the choice of new parts: markets offer originals, OEM quality copies and cheap low-quality counterparts. Cheap displays often have distorted color reproduction, low brightness and mediocre sensor performance, so savings at this stage can lead to the need for re-repair after a month.

The process of heating and removing the back cover

The Redmi Note 7 design involves mounting the back glass panel onto a double-sided tape and glue, so it requires heating to safely remove it. Put the smartphone off the screen down on the soft fabric or silicone mat so as not to scratch the front part during manipulation. Turn on the hair dryer and evenly warm the perimeter of the back cover for 2-3 minutes, constantly moving the flow of hot air so as not to overheat the battery or internal components at one point.

Once the body is warm to the touch (about 60-70 degrees), try to gently tuck the edge of the lid with a suction cup, placing it as close as possible to one of the corners. Pull the suction cup up, creating a small gap, and immediately insert a thin mediator or plastic card into the resulting slit, without using force to prevent the glass from cracking. Lead the tool along the perimeter, gradually cutting the adhesive layer, and if the plastic stops coming in, add a little more heat with a hairdrier.

• 🔥 Warm up the cover evenly, lingering at corners where the glue is usually more.
• 🛡️ Use only plastic tools for snapping, metal can break glass.
• 💧 If the cover sits very tightly, you can drop a little isopropyl alcohol into the gap to dissolve the glue.

When the lid is completely separated, do not put it far and do not put the inside on the table, as there may be residues of glue or fine dust.It is best to put it immediately on a clean wipe with the outside side down to avoid scratching the glossy surface.

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If the back cover cracked when removed, do not throw away large fragments - they can be used as a template for cutting the shape from the new double-sided tape, if it is not included with the display.

Dismantling internal components and battery

When you remove the back cover, you'll see the inside of your smartphone, where you first have to remove the plastic security bar that covers the connectors of the plumes, and this bar is mounted with a few screws that you have to twist out with a cross screwdriver, then carefully remove the plastic without damaging the adjacent plumes, and underneath the bar are the connections of the display, touchscreen and other modules with the motherboard, which require special care when you turn off.

The next critical step is to turn off the battery, as any manipulation of other powered plumes can cause the power controller on the board to fail. Find the battery connector (usually wide and located closer to the center or bottom of the board) and gently disconnect it with a plastic blade, putting it up from the bottom, not pulling the wires. Only after de-energizing the device can you safely disconnect the display and touchscreen plumes, which often come in the form of a single module.

Removing the display module itself often requires removing the battery, as in the Xiaomi Redmi Note 7 it closes access to the bottom of the mount or plumes. The battery is also glued to double-sided tape, so heating it and carefully tweaking it with a plastic card will help to remove the battery without deformation. If the battery is swelled or damaged, it must be disposed of in a special way, without piercing or bending.

Installation of a new display module

The process of installing a new screen starts with checking the configuration and compatibility, because even within the same model, there can be different revisions of the matrix. If you purchased a module without a frame, you need to glue all the small details from the old broken screen, including the speaker, vibrator and button plume home (if it is not built into the touchscreen).

Before you finally fix it, make sure you do a test connection: connect the display and touchscreen plumes to the motherboard, connect the battery and turn on the smartphone. Check the sensor's performance throughout the area, no broken pixels, brightness and autorotation to make sure the new part is working properly. Only after successful testing can you apply a new glue or double-sided tape to the case and finally assemble the device.

⚠️ Warning: Do not glue the display "deadly" until it is fully tested, a connection error or defect of parts may require re-disassembly, and to tear off the glued screen will be much more difficult and risky.

When applying adhesive (such as the B-7000 or T-7000), make sure it does not get into the camera lens, speaker, or charging connector. A thin strip of glue around the perimeter will ensure reliable sealing and fixation, and excess outwards can be easily removed with a napkin until the glue has frozen.

Assembly of the body and final inspection

After successful testing and application of the glue, carefully install the back cover in place, starting from one of the corners and gradually pressing it around the perimeter. Uniform pressure will ensure that the glass fits tightly to the frame and prevent the emergence of gaps, which can subsequently get dust or moisture. For better fixation, you can wrap the smartphone with several stationery gums or put it under a light press for 15-20 minutes until the glue catches.

Turn on your smartphone again and do a comprehensive check of all the functions: make sure that the speaker sounds clean, the microphone transmits voice, and the proximity sensor correctly extinguishes the screen during the call. Pay special attention to the touch screen in game mode, swiping your finger across the diagonals of the screen to exclude “dead zones” or false positives.

• 📱 Check the fingerprint scanner if it is located on the back cover.
• 🔊 Test the vibrator and sound volume through the media player.
• 📷 Launch the camera and check for focusing, as well as no dust under the lenses.

If all functions are working properly, you can consider the repair complete, but in the first couple of days it is worth refraining from extreme loads and water intake, so that the adhesive seam gains maximum strength.

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Quality assembly is not only a working screen, but also the tightness of the body, so do not save on glue and time to dry.

Sensor calibration and elimination

After replacing the display on the Xiaomi Redmi Note 7, you may need to calibrate the touchscreen, especially if you notice a slight inaccuracy in hitting icons or strange cursor behavior. To do this, there is a special test in the engineering menu of the smartphone, which can be accessed through the dialer code # # # #6484#. In the CIT (Customer Interface Test) menu, select "Touchpanel" and follow the instructions on the screen, drawing lines and points in the specified places.

In some cases, especially when installing non-original copies of displays, the sensor may not work properly due to differences in resistance or sensitivity. If standard calibration does not help, use third-party applications from Google Play, such as Touchscreen Calibration, which force retraining of the touchscreen controller, and it is also worth checking whether the glass layer is too thick, which can reduce sensitivity.

⚠️ Note: If after changing the screen, the smartphone stopped seeing SIM-If you're looking at the map or you're missing the speaker, check the density of the plumes and the condition of the connectors. Often the problem isn't with the display itself, but with an antenna module that's accidentally damaged during disassembly or an untwisted ground screw.

In a situation where the screen is working, but the image has unnatural colors or low brightness, it may be due to software failure or low matrix quality. Try resetting to factory settings or reflashing the device to rule out a software conflict of display drivers.