How to change the display on Xiaomi Redmi Note 7

A broken smartphone screen is always a bad situation, especially when it comes to the popular Xiaomi Redmi Note 7. Damaged glass or leaky matrix layer make using the device almost impossible, turning the gadget into a useless piece of plastic.

Replacing a display module on its own is a realistic task for anyone with minimal technical and neat skills. Redmi Note 7 owners often face the need to replace it because of the design of the case, where the glass is out of frame, making it vulnerable to falls. The right approach and the right tools will allow you to restore the device in 40-60 minutes.

In this article, we will take a look at the entire process, from the workplace preparation to the final touchscreen check, and you will learn the nuances of Xiaomi’s disassembly, how to safely unplug plumes, and why it is important to warm up the case before removing the back cover.

Diagnosis of damage and selection of components

Before you start to act, you need to accurately determine the nature of the breakage. Often users confuse the damage to the external glass with the failure of the matrix. If the screen shows cracks, but the image remains bright, colored, and the touch screen responds to touches throughout the area, you are lucky — most likely only broken glass. However, in modern smartphones, including the Redmi Note 7, the glass and matrix are soldered into a single module.

Replacing only glass at home is virtually impossible without specialized equipment such as a separator and a laminator. So even if only glass broke, you'll have to buy the entire prefabricated module, which simplifies the replacement process, since you won't have to mess with the B-7000 glue and carefully separate the layers, risking damage to the matrix.

When choosing a new part on the market, you will encounter three main types of displays: the original is the most expensive, but high-quality option with perfect color reproduction and brightness. High-quality copies (OLED) They may be slightly different from the original, but they have a smaller resource — IPS-copies that often have thicker frames and less saturated colors.

• 📱 Original module – full compatibility, correct calibration of colors and brightness, presence of a logo MI plume.
• 🎨 Quality copy (OLED) — good color reproduction, but possible nuances with sensor sensitivity in the corners of the screen.
• 💰 Budgetary IPS — low price, but often dim screen, inversion of colors at an angle and lack of oleophobic coating.

Be sure to check the equipment before buying. Often, modules are sold with a frame installed, which makes life much easier for the master. If you buy a display without a frame, you will have to glue all the small parts from the old broken module, which increases the risk of damage to the plumes and microphone.

⚠️ Note: When buying, pay attention to the color of the plume. In the original displays for the Redmi Note 7, the plume often has a specific marking, and the connector is made qualitatively, without backlashes.

Tools and workplace preparation required

You can’t have a good repair without a well-organized space and toolkit. Don’t try to disassemble the Xiaomi Redmi Note 7 on your lap or at a kitchen table lit up. You’ll need a flat, well-lit surface, preferably with antistatic coating or just clean.

The main enemy in disassembling modern smartphones is the glue that fixes the back cover and the display module. To soften it will require a heat source. Professionals use a thermostole, but at home, a normal hair dryer or a special heating pad, the main thing is not to overheat the device, so as not to damage the battery or plastic elements of the case.

The mobile electronics toolkit should include specific items that are not always in a standard home medicine cabinet: screw unscrewing requires precise screwdrivers, and opening the case requires thin plastic blades to avoid scratching metal and damaging fragile components.

Pay special attention to the cleanness of the hands and tools. The fat spots from the fingers on the new display inside the case will remain forever, as it will not be possible to disassemble the module again without risk. Prepare the screw containers in advance, since the Redmi Note 7 uses screws of different lengths, and it is extremely easy to confuse them.

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Use a magnetic mat or a piece of paper with sectors drawn to arrange the screws in order of their extraction, which will save you nerves when you build.

The process of disassembling the Redmi Note 7 body

The first step in replacing the display is to dismantle the rear glass cover. Unlike older smartphones with removable batteries, the Xiaomi Redmi Note 7 has a monoblock design. The cover is held on a two-part glue that requires careful warming up around the perimeter.

Turn on the dryer and warm up the back evenly for 2-3 minutes. Do not hold the hot air flow at one point for longer than 5-10 seconds, so that the glass does not burst from thermal shock. The heating temperature should be comfortable to touch with your hand, approximately 60-70 degrees Celsius. After warming up, use a suction cup to create a gap between the lid and the frame.

Insert a plastic blade or mediator into the gap, gently, drive the instrument along the perimeter, gradually snapping the glue away, move slowly, feeling resistance, if you feel that the lid is not amenable, warm up the problem area again with a hairdryer, do not use metal objects to open, because you can damage the antenna inserts or the lid itself.

⚠️ Attention: Be very careful at the bottom of your smartphone, and there's a fingerprint scanner plume that's glued to the lid, and a sudden jerking motion can break the plume.

Once the lid is removed, you will see the inside of the smartphone. Disconnect the battery immediately! That's the golden rule of electronics repair. Find the battery connector and gently disconnect it with a plastic blade. Only after it's turned off can you continue to work with other components.

Then you take off the plastic security pad that covers the main board and the plume connectors, and it's mounted with a few screws around the perimeter, and you unscrew them, you put the pad aside, and now you have access to the display and touchscreen plumes.

Dismantling the old display module

Now that the Redmi Note 7's interiors are available, you need to disconnect the plumes of the damaged screen, which are located at the top of the board and can be closed with a metal plate-screen. If you have one, carefully unscrew the screws that hold it.

The disconnection of the plumes requires delicacy. The connectors are quite dense. Use a plastic shoulder blade or nail (if it's not long) to fit the plume from the bottom up. Don't pull the plume itself, act on the detachment at the base of the connector. There are usually two or three of them: one for the image (Display) and one or two for the sensor (Touch).

The next step is to remove the module itself. In the Xiaomi Redmi Note 7, the screen is glued into a perimeter frame. It will require heating again to remove it. Put the smartphone face up and warm up the screen with a hairdryer for about 3-4 minutes. The glue should become soft and viscous.

To extract the module, you can use a thin line or a special string. Put the line in the upper corner between the frame and the display and the sawing movements, go around the perimeter. This will cut the layer of glue. If the display was in the frame, then after disconnecting the plumes and unscrewing the screws (if there are any on the sides), the module will simply be removed from the housing.

Installation of a new display and assembly

Before installing a new module, you need to carefully clean the frame of the residue of old glue, which can be done with your fingers by rolling glue into balls, or using isopropyl alcohol and a plastic card, the surface must be perfectly smooth, otherwise the new screen will be skewed or move away from the body.

Apply a new layer of B-7000 or B-6000 glue along the perimeter of the frame with a thin strip. Don't pour too much glue, otherwise it will leak onto the matrix or into the connectors when pressed. Let the glue dry a little (1-2 minutes) so that it becomes sticky but not sticky.

Carefully put the new display module in the frame, combining all the holes for speakers and cameras. Connect the plumes to the motherboard. Now the most important thing is the initial check. Without gluing the back cover or twisting the screws, plug the battery and turn on the smartphone.

Check the image, the presence of broken pixels, the touchscreen throughout the area and the operation of the proximity sensor. If everything is working correctly, you can proceed to the final assembly. Press the screen to the frame around the perimeter so that the glue grabs, and place a protective plastic plate over the plumes, twisting the screws.

• 🔧 Fixing – make sure all screws are twisted but not pulled over so as not to break the thread in the plastic.
• 🧹 Cleanliness - before closing the back cover, blow the insides with a pear or gently brush off the dust that got into the process of work.
• 🔌 Scanner plume – when installing the cover, make sure that the fingerprint scanner plume is laid exactly in its seat and was not squeezed.

Close the smartphone with the back cover, after making sure that the glue on the screen is already a little grasped and the module does not hang. Press the lid around the perimeter and, if necessary, lock the smartphone with rubber bands for 15-20 minutes to polymerize the glue.

Typical errors and troubleshooting

Even after the instructions, beginners often make mistakes that can lead to re-disassembly. One of the most common problems after replacement is a broken touchscreen or dead zones. Most often this is due to poor contact of the plume in the connector. Try to disconnect and re-connect the plume, making sure that the characteristic click.

Another common problem is the proximity sensor. Once the screen is replaced, the phone may stop turning off the screen during a conversation or, conversely, not responding to a touch to the ear. Xiaomi often requires software calibration of sensors through the engineering menu. To do this, type in the code # # #6484## and select "Proximity sensor".

⚠️ Note: If after replacement the screen works with artifacts or stripes that disappear when pressed on a certain area, most likely the problem is a bad connector press or damage to the plume itself during installation.

Also worth mentioning is the problem of "ghost touch": If the screen responds to touch where you're not touching, it could be a sign of a defective touchscreen or the presence of metal debris inside that closes the contacts. In rare cases, calibration through the app helps, but more often requires a replacement module under warranty.

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If after replacement there are problems with the sensor, in 80% of cases, reconnecting the plume and checking the presence of a protective film on the connector (it needs to be removed!) helps.

Frequently Asked Questions (FAQ)