Replacing the display on <em>Xiaomi Redmi Note 7</em>: a detailed guide with nuances

Xiaomi Redmi Note 7 remains one of the most popular smartphones on the secondary market due to its balance of price, performance and reliability. However, even such a “long-liver” has the most vulnerable point - display. A fall from a height, an impact or a manufacturing defect can lead to cracks, dead pixels or complete failure of the screen. Replacing the display at a service center will cost 3–7 thousand rubles, but if you have the tools and patience, you can carry out the procedure yourself.

In this article you will find step by step instructions with photos, comparison of original and non-original modules, as well as unique nuances of disassembly Redmi Note 7, which are not written about in standard guides (for example, how to avoid damaging the camera cable or why a new screen may not work without firmware). We will also look at typical errors that cause a smartphone to stop turning on after replacement, and give recommendations for calibrating the sensor.

When is a display replacement needed: symptoms and diagnosis

A crack on the screen does not always mean that the module must be completely replaced. Sometimes the problem lies in the cable, controller or software glitch. Before ordering a new display, check:

• 🔍 Visual damage: cracks, broken glass, leaks of liquid crystal liquid (appear as dark spots).
• 📵 Lack of response to touch: if the sensor does not work partially or completely, but there is an image, the problem may be in the touchscreen or cable.
• 🖥️ Artifacts on the screen: Dead pixels, stripes, flickering or snow often indicate damage to the matrix or graphics chip.
• 🔋 Doesn't turn on after falling: If the smartphone shows no signs of life, but vibrates when charging is connected, the display cable may break.

For accurate diagnostics, connect Redmi Note 7 to the computer via USB (in mode Fastboot). If the PC detects the device, but the screen remains black, the problem is definitely in the display or its connection. If the computer does not see the phone, the cause may be damage to the motherboard.

⚠️ Attention: If after a fall your smartphone overheats or discharges quickly, do not rush to replace the screen. This may be a symptom of a short circuit on the board, and replacing the display will only make the problem worse.

Selecting a display for Redmi Note 7: original vs analogues

There are three types of displays on the market for Xiaomi Redmi Note 7:

Display type	Price (RUB)	Pros	Cons
Original (OEM)	5 000–7 000	100% compatibility Original colors and brightness Warranty 6–12 months	High price, difficult to find in stock
Copy (A+)	2 500–4 000	Good build quality Minimal differences from the original Wide availability	There may be problems with sensor calibration
Budget analogue (A-)	1 200–2 000	Low price	Poor color rendering Low brightness Frequent problems with the touchscreen

When choosing, pay attention to display article number. For Redmi Note 7 the original module is marked DM-RN7-01 or DM-RN7-02 (depending on the batch). For high-quality copies, the article number may differ by one letter (for example, DM-RN7-01A). Avoid modules without markings - these are fakes with a low resource.

Important point: some non-original displays require firmware after installation. Without this, the sensor may not work correctly or may not respond to touches at all. Firmware is usually needed for modules with a controller Synaptics or FocalTech.

Tools and preparation for replacement

To replace the display with Redmi Note 7 you will need:

• 🔧 Screwdriver set: crusade PH00, flat 1.5 mm, pentaradial Y00 (to unscrew the bottom cover).
• 📱 Plastic paddles/picks: to separate the display from the case (metal tools can damage the cables!).
• 🔥 Hairdryer or hotplate: to soften the glue (temperature 60–80°C).
• 🧲 Sucker: to raise the screen after heating.
• 🔌 Tweezers: for working with small loops.
• 📦 Double-sided tape or glue: to fix the new display (for example, B7000 or Tesa 61395).

Also prepare your workspace: a table with good lighting, an antistatic mat (or at least a regular cloth so as not to scratch the body), and spare battery (if your smartphone does not turn on). Before disassembling it is necessary turn off your phone and remove SIM cards.

Remove the case and film|Turn off the phone and remove the SIM|Prepare tools and glue|Heat the edges of the display with a hairdryer (1-2 minutes)|Disconnect the battery (if possible)-->

⚠️ Attention: If the battery is swollen, do not try to remove it yourself! Risk of short circuit and fire. In this case, it is better to entrust the replacement of the display to the service.

Step-by-step instructions: disassembling and replacing the display

Screen replacement process Redmi Note 7 consists of 5 key stages. Follow the instructions carefully to avoid damaging the cables or the board.

1. Removing the back cover

On Redmi Note 7 The back cover is attached with latches and glue. To remove it:

1. Heat the edges of the case with a hairdryer (especially near the camera and connector USB-C).
2. Insert a plastic spatula into the gap between the lid and the frame (start at the bottom right corner).
3. Carefully move the spatula around the perimeter, releasing the clamps. Do not use force - the lid should come off with a slight crack.

2. Battery disconnection

After removing the cover, first disconnect the battery to avoid short circuit. To do this:

1. Remove the 4 screws securing the metal plate above the battery.
2. Carefully pry up the battery cable with a flathead screwdriver and disconnect it from the board.

3. Disconnecting the display cable

The display cable is located under a metal protection at the top of the board. To disable it:

1. Remove the 6 screws holding the protection plate in place.
2. Lift the plate and carefully disconnect the cable (it is secured with a latch - pry it up).
3. If the cable is glued, do not pull it by force - warm up the attachment point with a hairdryer.

4. Removing the old display

Now you can remove the damaged screen:

1. Heat the front of the phone (especially the edges) with a hairdryer.
2. Use a suction cup to lift the display and carefully separate it from the body with a plastic spatula.
3. If the glue is too strong, use thread or special display cutter.

5. Installing a new display

Before installing a new module:

1. Remove any remaining old glue from the case frame (you can use isopropyl alcohol).
2. Apply new glue (B7000 or double-sided tape) around the perimeter of the frame.
3. Connect the cable of the new display to the board and secure it with a latch.
4. Place the screen in place, starting from the top, and press it (do not press too hard!).

After assembly, connect the battery and check the screen functionality before final assembly. If there is an image, but the sensor does not work, firmware may be required.

What to do if the new screen does not turn on?

If after replacement the display does not show an image, check:

1. **Connecting the cable** - it should fit tightly, without distortion.

2. **Battery** - it may have turned off during work (connect the charger).

3. **Board** - If the phone does not vibrate when charging is connected, the problem may be a short circuit on the motherboard.

4. **Firmware** - some non-original displays require flashing the touchscreen via Fastboot.

Sensor firmware after replacing the display

If, after installing a new screen, the sensor does not work correctly (does not respond to touches, double clicks, “jumping” cursor), most likely the controller firmware is required. This is a typical problem for non-original displays with chips Synaptics or FocalTech.

For the firmware you will need:

• 🖥️ Computer with installed drivers ADB And Fastboot.
• 📂 Firmware for touchscreen (you can download it at 4PDA or XDA Developers for your display model).
• 🔌 Cable USB-C (preferably original).

Instructions:

1. Turn off your phone and press Volume Down + Powerto enter the mode Fastboot.
2. Connect your smartphone to your PC and check the connection with the command:

   fastboot devices

   If the device is detected, continue.

3. Flash the touchscreen with the command:

   fastboot flash touch [имя_файла_proшивки.img]

4. Reboot your phone:

   fastboot reboot

After flashing, check the sensor in the menu Settings → System → About phone → Diagnostics → Touchscreen test. If touches are detected correctly, the problem is solved.

⚠️ Attention: Unflashed displays may cause random clicks or freezing systems. If the problem persists after updating the firmware, try a different version of the firmware or return the old cable (it may be the problem).

Common mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing the display with Redmi Note 7. Here are the most common ones and ways to prevent them:

• 🔧 Damage to the camera cable: It runs next to the display cable. To avoid hitting him, use thin plastic spatula and don't pry too deep.
• 🔥 Board overheating: If you heat one area with a hairdryer for too long, you can melt elements on the motherboard. Hold the hair dryer at a distance of 5-10 cm and constantly move it.
• 📱 Incomplete display adhesion: If there are gaps around the edges, dust will accumulate under the screen over time. Use double sided tape with uniform pressure during installation.
• ⚡ Short circuit: If you forget to disconnect the battery, you can burn the board when connecting the cable. Always make sure the battery is disconnected to start of work.

Another common problem is broken light sensor after replacing the display. This happens if you forget to transfer a small part (light sensor) from the old module to the new one. It is located at the top of the screen next to the speaker.

Screen calibration and final checks

After successfully replacing the display, all that remains is to configure its operation:

1. Sensor calibration: Go to Settings → System → Advanced → Screen calibration and follow the instructions.
2. Checking color rendition: Compare the colors of the new screen with the old one (if possible) or use test images (for example, gradients).
3. Dead pixel test: Run a full-screen video with a uniform color (red, green, blue) and check for defects.
4. Auto brightness check: Cover the light sensor with your hand and the screen should dim. If this does not happen, the sensor is not connected or damaged.

If your new display seems too cool or warm in color, try changing the settings in Settings → Display → Color Mode. For Redmi Note 7 profiles available Standard, Saturated And Gentle.

It is also recommended to update your phone's firmware to the latest version - this will help avoid conflicts with the new display. You can download the official firmware on the website en.miui.com (choose version for Redmi Note 7 with code name lavender).

FAQ: Frequently asked questions about replacing the display

Is it possible to replace only the glass and not the entire display?

Technically yes, but it is extremely difficult and not always justified. On Redmi Note 7 The glass is glued to the matrix, and when trying to separate it, there is a high risk of damaging the matrix itself. In 90% of cases it is cheaper and more reliable to replace the entire module.

How long does it take to replace a display?

If you have experience - about 1–1.5 hours. Beginners may need 2-3 hours, especially if they have difficulty peeling off the old screen or flashing the sensor.

What should I do if after replacing the display works, but the sensor does not?

Most likely, the problem is due to one of three reasons:

1. The sensor cable is not connected or damaged.
2. Touchscreen firmware is required (see section above).
3. Defective display (especially important for budget analogues).

Try reconnecting the cable, flashing the sensor, or replacing the display with another one.

Is it possible to use the display from Redmi Note 7 Pro?

No, despite the external similarity, the displays of these models incompatible. U Note 7 Pro different screen resolution (1080×2340 against 1080×2280 at Note 7) and other pinout of the cable. Installing an unsuitable display will result in the screen not working.

How to check the originality of the display before purchasing?

Original display for Redmi Note 7 can be identified by:

• Inscriptions Xiaomi or Tianma (matrix manufacturer) on the cable.
• Article DM-RN7-01 or DM-RN7-02.
• Availability of protective film with logo Xiaomi on the inside of the glass.
• Price - the original cannot cost less than 4,000 rubles.

Buy displays only from trusted sellers with a guarantee.