Replacement of the screen on Xiaomi Redmi 9: a detailed guide with photos and nuances

A broken screen on Xiaomi Redmi 9 is one of the most common problems faced by owners of this budget smartphone. Falling from a height, hitting a hard surface or even bad pressure in your pocket can lead to cracks, broken pixels or complete sensor failure. In the service center, you will be asked from 2,500 to 5 000 rubles (depending on the region and type of module), but with patience and minimal repair skills, you can save up to 70% of the cost by doing the work yourself.

This guide will be suitable for all Redmi 9 versions (including Redmi). 9A, 9C, 9T), Because they're almost identical in design, we'll figure out how to choose a quality display, what tools you'll need, and we'll detail each step of disassembly, from removing the back cover to connecting the new screen. Particular attention will be paid to typical mistakes of beginners, which can lead to damage to plumes or motherboards.

If you've never taken a smartphone apart before, don't worry: the Redmi 9 is one of the most maintainable models in Xiaomi's lineup. There's no battery glue (unlike flagships), and most of the mounts are latches. But you can't be neat, thin plumes and fragile connectors require delicate handling. Before you start, consider your strength: if your hands are shaking at the thought of microscopic screws, you'd better trust the professionals.

1.What screen to buy for Redmi 9: Original vs. Analogue

The first and most important step is choosing a new display, which not only affects the look of the phone, but also the sensor, color reproduction and even battery life, and there are three types of screens on the market for the Redmi 9:

🔹 Original (OEM) — They are taken from donor phones or supplied from Xiaomi factories, guarantee 100% compatibility, but are expensive (from 3,500 rubles), easy to identify by the marking on the plume and no backlight defects.

🔹 Premium copies are made in the same factories as the originals, but without the Xiaomi logo. Price: 1,800-2,500 rubles. Quality is close to the original, but there may be minor flaws (for example, a slightly cold shade of white.

🔹 Budget analogues are cheap Chinese displays (from 1,200 rubles), often suffer from broken pixels, uneven backlights or a soap sensor, suitable only for temporary replacement.

💡 Tip: Before buying, check to have screen glue (usually double-sided scotch) in the kit. 3M or B7000). If you don't have one, buy it separately. Also note the type of plume connector: Redmi 9 has 26 pins, but some may be different.

2. Replacement tools: what will be needed

To disassemble the Redmi 9 and install a new screen, you will need a minimum set of tools, most of which can be bought in a smartphone repair kit (cost: 300-800 rubles) or separately:

• 🔧 Plastic blades (mediators) - to disconnect the latches of the case. It is better to take a set with different thicknesses (0.1-0.3 mm).
• ⚙️ Screwdriver cross (PH00) — Important: don't use magnetic nozzles, they can damage the sensors of the phone!
• 🔥 A hair dryer or a thermo-air station to soften the glue under the screen, a temperature-adjusted household hair dryer is suitable (maximum 80).°C).
• 🧲 Screen suction cup, which helps to gently lift the display after heating, can be replaced with wide tape.
• 📏 Tweezers are for plumes and fine details. You'd better choose a curved-end model.
• 🔌 Tester or multimeter (optional) – to check the integrity of the plumes after disassembly.

⚠️ Warning: Never use metal blades or knives to disengage the body! They can damage plastic latches or cut through plumes. Also avoid overheating the screen - if the glue does not lend itself, it is better to repeat the heating, rather than pressing harder.

If you plan to use the phone after replacement, we recommend you to buy more:

• 🛡️ Protective glass to protect the new screen.
• 🔋 New battery (if the old one is swelling or has lost capacity).
• 🧴 Isopropyl alcohol (90%+) — cleansing contacts from old glue.

Make sure you have one.|A flat surface with good lighting

Turn off the phone and remove it. SIM-map|Clean napkin without pile

Prepare the screw container|Rechargeable battery (if you plan to turn off your old battery)

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3. Step-by-step disassembly of Xiaomi Redmi 9

Now, to the most critical part of the process, which is disassembling the phone, take a picture of every step, especially the location of the plumes and screws, and avoid any build errors.

📌 Step 1: Turn off and heat the screen

1. Turn off the phone and remove the tray for SIM-map.
2. Plug on the screen paint tape (so as not to scratch the glass when scraping glue).
3. Heat the edge of the screen around the perimeter for 2-3 minutes. Keep the hair dryer at a distance of 5-7 cm, so as not to overheat the display.

📌 Step 2: Separation of the screen from the body

1. Suction carefully raise the screen from any side (it is better to start from the bottom edge, where the connectors are located).
2. Insert a plastic blade into the resulting gap and slowly lead it along the body, disconnecting the latches.
3. Do not raise the screen more than 45.° — The plumes are still connected!

📌 Step 3: Turn off the plumes

1. Unscrew 4 screws that fix the metal plate above the plumes (they are of different sizes - remember the location!).
2. Carefully disconnect the plugs of the display, sensor and battery (use a plastic spatula, not nails!).
3. Now you can take the screen completely off.

⚠️ Attention: If the screen is not moving away despite the heat, do not apply force! probably the glue has not softened enough. Repeat the heating for another 1-2 minutes. If you exert too much effort, you risk tearing the plume from the motherboard - this will lead to the need to replace the entire board (cost: from 8000 rubles).

4. Installation of a new screen and assembly of the phone

When the old screen is removed, clean the case of glue residues with isopropyl alcohol and a napkin without pile. Make sure there is no dust or debris on the frame - they can get under the new display and cause image defects.

📌 Step 1: Prepare a new screen

1. Remove the protective film from the inside of the module (if any).
2. Check the integrity of the plumes - they should be smooth, without classes.
3. Plug double-sided tape around the perimeter of the screen (if it does not come with the kit).

📌 Step 2: Connecting the plumes

1. Carefully connect the plumes in reverse order: first the battery, then the sensor, then the display.
2. Make sure the connectors are snapped to the end (a slight click should be heard).
3. Set the metal plate and twist the screws (do not pull!).

📌 Step 3: Installation of the screen

1. Line the new display along the edges of the body and press gently.
2. Warm up the screen edge with a hair dryer (temperature 60–70)°C) to make the glue better grasped.
3. Place the phone under a press (for example, between two books) for 10-15 minutes.

⚠️ Warning: If after assembly, the screen doesn't respond to touch or displays artifacts, don't panic.Possible reasons:

• 🔌 The plume is not connected to the end - check the connectors.
• 🔥 Overheating the display when installed - let the phone cool for 30 minutes.
• 🛠️ New screen defect – test it on another phone (if possible).

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If the screen floats or moves away after replacement, it may be due to poor-quality glue, in which case, gently heat the problem area with a hair dryer and press the screen again.

Calibration of the sensor and check of performance

Even if the new screen is physically installed correctly, software calibration of the sensor may be required, which is because the Xiaomi Redmi 9 uses custom calibration profiles for each display.

📌 How to perform calibration:

1. Turn on your phone and check your touch response. If the sensor doesn't work properly (like pressing on its own or not recording touches), proceed to calibrate.
2. Install the Touchscreen Calibration app from Google Play.
3. Follow the instructions on the screen: usually click on the dots that appear for 1-2 minutes.
4. Reboot the phone.

If calibration didn’t help, the problem may be:

• 🔧 Bad contact sensor plume - check the connector on the board.
• 🔄 Screen incompatibility – some cheap analogues require firmware for a special driver.
• 🛠️ Damage to the sensor controller on the motherboard (in this case, only a service center will help).

💡 Useful tip: After changing the screen, reset your phone to factory settings (Settings) → The phone. → Resetting settings: This will help avoid software conflicts associated with the new display.

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If the screen is working after the replacement, but the backlight flashes or stripes appear, the problem may be a faulty plume or insufficient power. Try to turn off the battery for 5 minutes and reconnect.

Typical post-replacement problems and their solutions

Even if you change the screen carefully, you can have problems, and we've collected some of the most common ones and ways to fix them:

🔧 If nothing works, maybe the problem is deeper, like damage to the motherboard or the power controller, and you'd better go to the service center, but 90 percent of the time, the problem is solved by reconnecting the plumes or replacing the defective screen.

⚠️ Warning: If the phone starts to run out quickly after replacing, check if you damaged the battery during disassembly.A bloated or deformed battery must be replaced urgently - it can cause a fire!

7.Substitution cost: comparison of self-repair and service

Let’s calculate how much it costs to replace the screen on Redmi 9 in different versions:

• 🛠️ Independently (with the purchase of tools): Premium screen: 2,500 RUB Toolkit: 500 RUB (single purchase) Glue and alcohol: 200 RUB Total: ~3,200 rubles.
• 🏢 In the service center: The original screen + work: 4 500-5 500 rubles Analog + work: 3000-4000 rubles.
• 📦 Warranty replacement: If the phone is warranty and the screen is not your fault (for example, a factory defect), repairs can be free.

💰 Bottom line: Self-replacement costs 30 to 50 percent less than service, but if you're not sure about your skills, the risk of damaging your phone can be even more costly. For example, replacing a motherboard with a broken plume costs 8,000 to 12,000 rubles.

📢 Tip: If you decide to repair the phone yourself, order a spare plume display (cost: 300-500 rubles.

8.Prevention: How to protect the Redmi 9 screen from damage

To avoid having to change the screen again, follow the following simple rules:

• 📱 Use a cover with sidelines - it will protect the screen when falling on a flat surface.
• 🛡️ Stick a protective glass, which absorbs up to 80% of the impact energy, and you'd better choose a model with oleophobic coating (repels prints).
• 🚫 Don’t put your phone in your back pocket – it’s the most common cause of falls when sitting down.
• 🔋 Avoid overheating – do not leave your phone in direct sunlight (like a torpedo in a car) and overheating weakens the glue and the screen may detach.
• 💧 Keep away from moisture – even if the phone does not sink, water ingress under the screen leads to corrosion of plumes.

🔍 Fun Fact: According to service centers, 60 percent of Redmi 9 screen damage occurs in the first 3 months after purchase, because new owners are not used to the phone’s dimensions (it’s bigger than it looks!) and often drop it. If you have just bought a Redmi 9, be careful in the first few weeks.

⚠️ Warning: If colored stripes or flickering appears on the screen without physical damage, this may be a sign of the plume detachment (a common problem after falls).In this case, do not drag with repairs - the longer the plume dangles, the higher the risk of it breaking off.

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Replacing the screen with a Redmi 9 is one of the easiest operations among Xiaomi smartphones thanks to its modular design. The main thing is to take your time and follow the instructions. If you can do this, replacing the battery or speaker will seem like an easy task!

FAQ: Frequent questions about replacing the Redmi screen 9