Replacing the screen with Xiaomi Poco: from module selection to sensor calibration

A cracked or broken screen on Xiaomi Poco is a problem that one in five owners face after 1.5-2 years of use, ranging from mechanical damage to factory defects (especially for Poco models). X3 NFC POCO F3 The service center will ask for a replacement of the display from 3,500 to 8000 rubles - but with the tools and patience, you can do the procedure yourself, saving up to 70%.

This article isn’t about “just sticking glass in”: we’ll break down the full replacement of the display module (including touchscreen, backlights and plumes), go into detail on the nuances for different Poco models, and reveal secrets that are not covered in 90% of the instructions, for example, why autobrightness may not work after the replacement, or why the new screen “floats” when touched, and you will learn how to distinguish the original module from a fake on 5 key features – this will save you nerves and money.

If your Poco stopped responding to touch, vertical stripes appeared on the screen or the backlight flashes - don't be quick to blame the fall. 30% of cases are the fault of the detached plume (typical for Poco). X3 Pro after overheating, or a firmware failure. Before disassembling the phone, try resetting your settings via Recovery. + Volume up when the device is turned off. If the problem persists, read on.

1. Diagnosis: Do you really need a new screen?

Before buying a module for 15 000-20 000 rubles (the price of the original screen for Poco) F5 Pro) make sure that the display is to blame, symptoms in which replacement is justified:

• 🔹 Physical damage: cracks, broken glass, black spots from impacts.
• 🔹 Image artifacts: vertical/horizontal stripes, flickering, "broken" pixels.
• 🔹 The touchscreen does not work: the phone does not respond to touches or registers "ghost" presses.
• 🔹 The backlight doesn't turn on, but the phone makes sounds and vibrates (check if the flashlight is shining - if so, the display is to blame).

If the screen is working, but the image is upside down or blurred, the problem may be GPU To check, connect your phone to your PC via a firmware. USB-C And you can use Scrcpy, for free, and if you have a normal picture on your computer, it's the display module that's to blame.

⚠️ Attention: On Poco M4 Pro 5G POCO X4 Pro often breaks not the screen itself, and the flexible plume that connects the display to the motherboard. its replacement costs 3-5 times cheaper (800-1 500 rubles), but requires soldering work. If you are not sure, take the phone to the diagnostics.

For accurate diagnosis, use test modes:

1. Enter the code ##6484## (to check the touchscreen) in the phone application.
2. Or #4636## → Choose Testing → Touch Screen Test.

If the test shows a non-functioning zone, it's a replacement display. If the screen doesn't respond at all, check the plumes.

2. Screen selection: original vs. copy

The Xiaomi Poco parts market is flooded with fakes that are seemingly indistinguishable from the original, but last 2-3 months.

Where to buy:

• 🛒 Official service centers - a guarantee of 6 months, but the price is 20-30% higher.
• 🌍 AliExpress (Xiaomi Mi Store Official, Digi-Flash) – cheaper, but delivery 2-3 weeks.
• 🏢 Local repair shops – sometimes sell used originals after replacement.

⚠️ Attention: On Poco F4 GT POCO F5 We have screens with ultrasonic fingerprint scanners, and fakes don't support this function, because when you replace them, the scanner will stop working!

Critical nuance: on models with AMOLED-screens (e.g. Poco) F3 GT) The original modules retain factory settings, copies require manual adjustment via Engineer Mode (code #36446337##).

Tools and training

To replace the screen on Xiaomi Poco you will need:

• 🔧 Screwdriver kit: cross-haired PH00, flat 1.5 mm, five-pointed Y00 (for some).
• 🧲 Screen suction cup (diameter 5-7 cm).
• 📏 Plastic blades (metallic can damage plumes!).
• 🔥 Hair dryer or thermo-air station (for softening glue).
• 🧴 Isopropyl alcohol 90% (for cleaning glue residues).
• 📱 New display module with glue tape in the kit.

In addition:

• 🔋 External battery (if the phone battery is discharged below 30%).
• 📎 Clay. B-7000 (if there is no screen in the set).
• 🧤 Antistatic bracelet (protection against static electricity).

Preparation of the workplace:

1. Cover the table with a soft cloth (so as not to scratch the screen).
2. Make sure there is no dust in the room – it may fall under the new display.
3. Remove rings and bracelets from your hands – they can close contacts on the board.

Turned off the phone and pulled it out. SIM-map|

Charged the battery to 30-50%|

Prepared all the tools.|

Photographed the location of the plumes (in case of error) |

Wearing an antistatic bracelet (or touching a grounded object)

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On Poco models X3 And the newer screen is glued with water-resistant glue, so to soften it, heat the phone with a hair dryer from 5-7 cm for 2-3 minutes, evenly leading along the edges. Don't overheat - the temperature is above 60°C could damage the battery!

4. Screen replacement by step

The instruction is universal for most Poco models, but there are nuances for specific devices (see spoilers below).

Step 1: Removing the back cover

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover around the perimeter (especially at the connector) with a hair dryer. USB-C).
3. Insert a plastic spatula into the gap between the lid and the case (start with the corner next to the volume button).
4. Carefully drive the shoulder blade around the edge, snapping the latches. F3 12 of them - take your time!

Step 2: Shutting off the battery

• Remove the metal plate covering the battery (unscrew 4 screws) PH00).
• Disconnect the battery connector with a plastic spatula (not metal!).
• Check the voltage on the contacts of the battery multimeter - should be 0 V.

Step 3: Removing the Old Screen

1. Heat the front panel with a hair dryer (2-3 minutes).
2. Stick the suction cup to the bottom of the screen (where the connector is) USB-C).
3. Pull the suction cup up while putting the screen up with a spatula. X3 NFC The plumes are on the right - don't pull too hard!
4. Disconnect the plumes of the display and touch screen (they are fixed with latches - put them in a spatula).

Step 4: Install a new screen

1. Clean the phone frame of the old glue with alcohol.
2. Remove the protective film from the new module and gently apply it to the frame.
3. Connect the plumes in reverse order (first touchscreen, then display).
4. Close the latches on the connectors - they should click.

Step 5: Assembly

• Stick the back cover onto a double-sided scotch or glue B-7000.
• Turn all the screws (don’t pull them over to Poco) F4 GT plastic-carving!).
• Turn on your phone and check the screen.

If the screen is not activated after assembly:

• 🔌 Check if the sleeves are sitting tightly in the connectors.
• 🔋 Connect your phone to charge – it may be that the battery has run out during work.
• 🔧 Recheck the connection of the backlight plume (it is thinner than the others and often falls out).

💡

If the new screen is working but the colors seem dim, reset the display settings via Engineer Mode (code ##36446337##). → Color Saturation → Default

5. Calibration of the touchscreen after replacement

Even the original screen may require calibration, especially if you notice:

• 🎯 Touches are not registered where you clicked.
• 🖱️ The cursor "jumps" when moving slowly.
• ⏱️ Delay between touch and reaction (more than 100 ms).

For calibration:

1. Install the Touchscreen Calibration app from Google Play.
2. Run the test and follow the instructions (usually click on 5-10 screen points).
3. If the app doesn’t help, reset your settings via Recovery (see the first section).

For models with AMOLED-screens (Poco) F3 GT, Poco F4):

1. Enter the code ##6484##.
2. Select the Touch Screen Version and check if the version matches the original version.
3. If not, update the touchscreen firmware through MIUI (Section Update of the SO).

⚠️ Attention: On Poco X4 GT and the new calibration is reset after each update MIUI. To avoid problems, disable automatic updates in settings (About phone) → Updating the system → ⚙️ → Auto-update).

💡

If after calibration the problem remains, check the integrity of the plume touchscreen. M4 Pro it is often rubbed against the body - in this case, only the replacement of the plume (cost) will help. ~1 200 rubles).

6. Frequent mistakes and how to avoid them

Experienced masters distinguish 5 most common mistakes when replacing the screen with Xiaomi Poco:

A special case - Poco F5 Pro with curved screen. The glue is applied unevenly, the edges are thinner and the center is thicker. If you don't take that into account, the new screen will squirm when you press it. Solution: use liquid glue. UV-curing (applied with a syringe and frozen under an ultraviolet lamp).

Another common problem is that autobrightness is broken after replacement, and the reason is that 80 percent of the time, the masters forget to move the light sensor from the old screen to the new one, and it's located at the top of the module (near the front camera) and it looks like a little black hole, and without it, the phone won't be able to adjust the brightness automatically.

7. Checking the performance

After replacing the screen, make a full diagnosis:

• 📱 Touchscreen: Test all screen areas (use the Touch Screen Test app).
• 🎨 Colors: Open a white background (such as notes) and check for uniformity of the backlight.
• 🔦 Brightness: Turn on auto-adjustment and direct light to the sensor - the screen should darken.
• 🔋 Charging: Connect your phone to the network – if the screen flashes, the problem is in the backlight plume.
• 🎵 Speakers: play the video - the sound should be clear, without wheezing (on Poco) X3 speaker is located next to the connector USB-C).

If something is not working properly:

1. Check the connection of all the plumes.
2. Reset your settings via Recovery (does not delete user data!).
3. Update the firmware through MIUI (Sometimes you need to re-flash the touchscreen).

To check the response rate of the touchscreen, use the site touchscreen-test.com. Normal value for Poco is 50-80 ms. If above 100 ms, you need to calibrate or replace the plume.

8. Alternatives to screen replacement

If the cracks are small or the screen is working but there are defects, consider alternative solutions:

1. Glass replacement (without display)

• ✅ Suitable for Poco M3, Poco X3 cracked but working touchscreen.
• ❌ It will not help if the matrix is broken or the backlight does not work.
• 💰 Cost: 1,500–3,000 rubles (depending on the model).

Liquid glass film

• ✅ Hiding small scratches, prevents further spread of cracks.
• ❌ Does not restore the screen performance.
• 💰 Cost: 500-1000 rubles (applied in the cabin).

3. Connection to an external monitor

• ✅ Allows you to use your phone if the screen is completely broken, but the touchscreen works.
• ❌ Inconvenient for everyday use.
• 🔌 Required. USB-C → HDMI adapter (price: 800-1 500 rubles).

4. Policy solutions

• If the screen flickers, try turning off autobrightness in the settings.
• If part of the screen is not working, turn on left-handed mode (Settings) → Special facilities → One-hand mode).

For models with AMOLED-screens (Poco) F3 GT, Poco F4) Sometimes it helps to reset the color settings:

1. Enter the code ##36446337##.
2. Choose Display. → Color Mode → Default.
3. Reboot the phone.

⚠️ Attention: On Poco X4 Pro 5G And then there's Second Space, and if the screen doesn't respond to touch, try swiping between spaces down two fingers from the top edge. Sometimes the touchscreen only crashes in one of the spaces!

FAQ: Frequent questions