Replacement of the screen on Xiaomi Redmi 8: detailed instructions with photos and videos

A cracked or broken screen on the Xiaomi Redmi 8 is one of the most common problems after falls or mechanical damage. Unlike flagship models, where replacing the display can cost half the cost of the phone, for the budget Redmi 8, repairs are often economically justified. However, not all service centers take this model because of its age (released in 2020), and prices for services vary from 3,000 to 8,000 rubles depending on the region.

Replacing the screen on your own saves up to 70 percent of the cost, but requires accuracy and basic electronics skills. In this article, we will look at the step-by-step process of replacing the screen, from selecting parts to testing a new display, focusing on typical errors that cause damage to plumes or motherboards, and provide recommendations for diagnosing faults before repairs begin.

If you've never taken smartphones apart, it's worth weighing the risks: improper battery disconnection or damage to flexible cables can turn the phone into a "brick." FAQ-A block with answers to frequent questions, and experienced users will find here a comparison of original and non-original screens, a table of compatibility of parts and tips for calibrating the sensor after replacement.

1. Fault Diagnostics: When do I need a screen replacement?

Before ordering a new display, make sure that the problem is in the screen.Symptoms of a faulty screen on Redmi 8 can overlap with the breakdown of other components:

• 🔍 Cracks or broken glass are obvious, but sometimes only the outer layer gets damaged and the matrix remains working. Check the sensor response: if it responds to touch, you can do with a glass replacement (cheaper 30 to 50%).
• 🖥️ Artifacts in the image: vertical/horizontal bands, flickering, broken pixels, this indicates damage to the matrix or plume. Try connecting the phone to an external monitor through the external monitor. USB-C → HDMI (If the picture on the monitor is normal, it's the screen.
• ☠️ Black screen without reaction: if the phone vibrates when ringing or charges (hot connector), but the image is missing, the problem may be in the plume, backlight or motherboard. On Redmi 8, a common cause is the oxidation of the plume contacts due to moisture ingress.
• 👆 The sensor doesn't work, but the image is there, because the touchscreen or the controller is to blame, and 80 percent of the time, replacing the entire display module helps.

For accurate diagnosis, use test modes:

1. Turn off the phone.
2. Press Volume Up + Power before the Mi logo appears.
3. In the Fastboot menu, select Test Mode (navigation with volume buttons, confirmation - power button).
4. Take the Touch Screen Test and LCD Test.

⚠️ Warning: If the phone doesn't turn on at all (no vibration, doesn't warm up when charging), the problem may be in the battery or the board.

2.Selection of spare parts: original vs. copy

The screen for Xiaomi Redmi 8 consists of three parts: matrix (LCD), So, the touchscreen and the safety glass, 90 percent of the time, they sell the finished 3-in-1 modules, where all the elements are glued together, and we'll see what options are available on the market:

When choosing, pay attention to:

• 📦 Set: the set should be glue for fixing the screen and a screwdriver for disassembly.
• 🔧 Compatibility: Make sure the module is suitable for the model M1908C3JG (Redmi 8 global version).
• 📏 Size: The original screen has a diagonal 6.22" permittingly 720×1520 (HD+).

Where not to buy:

• ❌ Hands without warranty (risk of getting a broken or non-working module).
• ❌ Sellers with a rating below 95% on the marketplace.
• ❌ Modules without photos of real goods (often slipping cheap copies).

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Before buying, ask the seller to shoot a video with a screen test (sensor) + This will reduce the risk of getting a defective part.

3. Required tools for replacement

To disassemble the Redmi 8 and replace the screen, you will need:

• 🔧 Screwdriver kit: cross-haired PH00 (for shell screws) and flat 1.5 mm (for latching).
• 🧲 Suction cup (diameter 5-7 cm) for screen removal.
• 📏 Plastic mediators (or guitar mediators) – to avoid damaging plumes during disassembly.
• 🔥 Hair dryer or thermal air station for softening glue (temperature 60-80)°C).
• 🔋 Tweezers with thin ends for working with plumes.
• 🧴 Isopropyl alcohol (90%+) clean-up.
• 🛠️ Double-sided tape or glue B-7000 fixate.

The cost of a full set of tools is about 1,500-2,500 rubles. If you plan to repair equipment regularly, it makes sense to buy a professional kit (for example, iFixit Pro Tech Toolkit).

Alternative solutions:

• 🔄 If there is no hair dryer, you can use hot water (heat the screen over the steam for 2-3 minutes), but this is less effective.
• 🧲 Instead of a suction cup, a wide scotch, a cross-painted cross on the screen will suit.

⚠️ Warning: Do not use metal tools (knives, screwdrivers) to tweak the screen - this is almost guaranteed to damage the plumes or matrix. Plastic mediators are safer, even if the process takes longer.

Backup of data (in case of error)|Charge your phone at least 50 times%|Prepare the workplace (clean surface, good lighting)|Turn off the phone from the network|Wear an antistatic bracelet (optional)-->

4. Step-by-step instructions for replacing the screen

The process of replacing the screen with Redmi 8 takes 1-2 hours if you have experience. If you are doing this for the first time, be patient and follow the instructions strictly by steps.

Step 1: Turn off and heat up the screen

1. Turn off the phone and remove it. SIM-card and memory card (if any).
2. Heat the screen with a hair dryer around the perimeter for 3-5 minutes. Keep the hair dryer at a distance of 5-7 cm so as not to overheat the display.
3. Check the temperature with your hand – the screen should be warm, but not burning.

Step 2. Remove the back cover

1. Insert a plastic mediator into the gap between the lid and the case (start at the bottom edge where the charging connector is).
2. Carefully swipe the mediator around the perimeter, snapping the clamps. Don't force it, the lid should come off with a slight click.
3. Put the lid aside. Be careful, it's got a fingerprint scanner attached to it (on models with a sensor on the back).

Step 3. Shutting down the battery

1. Tap the battery with a plastic spatula and disconnect the power plume (it is under a black protective tape).
2. Use tweezers to gently unplug the connector. Don't pull the wires - this can tear the contacts off the board!

Step 4: Removing the old screen

1. Suction or tape raise the screen 1-2 mm (enough to enter the mediator).
2. Swipe the mediator around the edge, separating the screen from the body. The glue will resist — take your time.
3. When the screen is separated, put it face down. Don't pull the plumes!
4. Open the metal latches that hold the display and touchscreen plumes (they are located next to the battery connector).
5. Carefully disconnect the plumes with tweezers. Remember their location, when you connect a new screen, it is important not to confuse.

Step 5: Install a new screen

1. Remove the protective film from the new module.
2. Connect the plumes in reverse order: first touchscreen, then display.
3. Close the metal latches (they should click).
4. Apply a thin layer of glue B-7000 around the perimeter of the case or use bilateral scotch.
5. Carefully press the screen, starting at the top, make sure it sits smoothly, without skewing.

Step 6: Assembly of the phone

1. Connect the battery and check the screen performance (turn on the phone without closing the lid).
2. If everything works, click the back cover starting at the top edge.
3. Turn the screws (do not pull!).

5. Common Mistakes and How to Avoid Them

Even with a careful replacement, there is a risk of errors that will lead to further breakdowns.

• ⚡ Trail damage: most often torn when unplugged carelessly. Always tweezer the connectors by the plastic edges, not the wires.
• 🔋 Short circuit: if you forget to turn off the battery, you can burn the board when manipulating plumes.
• 📏 Uneven screen setting: if the module is skewed, the sensor will not work properly (e.g., spontaneous pressing).
• 🔥 Overheating when drying glue: do not use a dryer at maximum temperature - this can melt plastic latches.
• 🔄 Mixed plumes: display and touchscreen connectors are similar, but not interchangeable.

How to minimize the risks:

• 🛠️ Work on an antistatic mat or grounded surface.
• 📸 Take a photo of each step – it will help to assemble the phone correctly.
• 🔍 Use a magnifier to inspect contacts on plumes (oxidation or contamination can cause failures).

⚠️ Note: If the screen is working after the replacement, but the sensor is floating (pressings are not recorded where you touch), you need to calibrate. To do this, install the Touchscreen Calibration application from Google Play or reset (Settings are not recorded). → System system → Resetting settings).

Sensor calibration and testing

After replacing the screen with Redmi 8, you may need to calibrate the touchscreen, especially if you have a non-original module installed.

Method 1. Through the Engineering Menu

1. Open the Phone app and dial ##6484##.
2. Select the Touch Screen Test.
3. Follow the instructions on the screen (usually click on the dots that appear).

Method 2. Using the application

1. Install Touchscreen Repair or Display Tester from Google Play.
2. Run the Multi-Touch and Accuracy test.
3. If deviations are detected, perform manual calibration (in the application settings).

Testing of the display

Check the screen performance with these tests:

• 🎨 Color palette: Open the image with gradients (black, white, red, green, blue) and the original screen should not have spots or uneven backlights.
• 🔍 Sensor sensitivity: try typing in notes - all clicks must be clearly recorded.
• 🔋 Automatic Brightness: Turn on the feature in the settings and check if the screen responds to changing lighting.

If problems are found:

• 🔄 Artifacts on the matrix: perhaps the plume or the module itself is damaged.
• 👆 The sensor doesn't work partially: check if the touchscreen connector is tightly seated. If the problem persists, the module is defective.
• 💡 Dim backlight: Make sure the backlight plume (thin white wire) is not damaged.

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If the screen is working after the replacement, but the phone is discharged quickly, check if background processes are still on (for example, constant sensor activity due to poor calibration).

7. Cost of repair in the service vs. self-replacement

Prices for replacement screen Xiaomi Redmi 8 service centers vary depending on the region and type of spare parts:

When to contact the service:

• 🔧 If you have no experience in electronics.
• 📱 If the phone is warranty (self-repair cancels it).
• ⚡ If after replacement there are problems with the fee (not included, not charged).

When is it better to do it yourself:

• 💰 If the budget is limited (savings up to 50%).
• 🛠️ If you already have the tools.
• 🔄 If the phone is not the main one (the risk of error is less).

The average cost of work in the service is 1,500-2,500 rubles. If you are confident in your abilities, self-replacement will cost less, but remember: Xiaomi Redmi 8 is a budget phone, and sometimes repairs can cost almost as a new device (the price of used model in 2026 is 5,000-7000). ₽).

FAQ: Frequent questions about screen replacement