How to replace the touchscreen Xiaomi Redmi 9A: full-length guide

Cracked or broken touchscreen on Xiaomi Redmi 9A — The problem that many owners of this budget smartphone face is that the causes of the breakdown can be different, from mechanical damage after a fall to factory defects or wear of the plume contacts. The service center will take from 2,500 to 4,000 rubles for a replacement, but with tools and patience, the procedure can be performed independently - this will save up to 70% of the cost.

But before you start repairing, it's important to evaluate your strength. 9A It requires precision: there are thin plumes that are easy to tear, and adhesive base of the screen that needs to be evenly warmed. If you have not previously disassembled smartphones or are not confident in your soldering skills (it may be necessary for a battery plume), you should consult a professional. In this article, we will analyze the entire process from the selection of a spare part to the final testing - taking into account the typical errors and pitfalls of this particular model.

It is worth noting that Redmi 9A (codename dandelion has two modifications of the screen: with a connector ZIF (The first one is less common, but it's easier to replace, the second one requires a soldering station, and you can find out your version by taking apart the phone or by looking under the protective film on the back of the screen, which usually shows the type of connector.

1. Diagnosis of malfunction: is it really the fault of the touchscreen?

Before you order a new screen, make sure that the problem is in it. 9A:

• 🔲 The screen reacts to touches chaotically or with a delay.
• 🖥️ Image is available, but the sensor is not working at all.
• 🔄 Part of the screen does not respond to touch (for example, only the upper or lower half).
• 💥 Visible cracks or “web spiders” on glass.

However, similar symptoms can cause:

• 🔋 Battery plume (frequent problem after falls).
• 🔌 Damage to the motherboard (for example, after moisture is ingested).
• 🛠️ Firmware failure (solved by resetting to factory settings).

To rule out programmatic reasons, reset through Settings → The phone. → Reset. If there's a problem, take your phone apart and check the plumes. 9A The touchscreen plume often moves away from vibrations, even without visible damage to the body.

⚠️ Note: If the screen is completely black, but the phone vibrates when turned on, the problem may be the backlight (LED-It's not going to help if you replace the touchscreen.

2. Selection of spare parts: original vs. analog

There are three types of screens for Redmi on the market 9A:

1. Original (OEM) — The cost of 3,000-4,500 rubles, guarantee 100% compatibility, but may have traces of use.
2. High quality copies (e.g. from Tianma or BOE). Price 1,800-2,500 rubles. quality is close to the original, but there may be problems with color calibration.
3. Budget analogues (Chinese no-name) cost 1,200-1,800 rubles, but often have defects: uneven illumination, “dead” zones of the sensor or rapid wear.

When choosing, pay attention to:

• 📦 Type of connector: ZIF (solderless) or soldered plume.
• 🔧 Set: the set should be adhesive tape for mounting the screen and protective film.
• 📅 Release Date: Old batches may have burned pixels.

Where to buy? Proven sites:

• 🛒 AliExpress (Xiaomi Mi Store Official or Xiaomi Mi Store) DYS Store).
• 🏬 Local service centers (sometimes sell parts in bulk).
• 🌍 eBay or Amazon (for original details).

⚠️ Note: when buying, check whether there is glue in the set B-7000 Without it, the screen will not fit tightly into the body, leading to gaps and dust.

3. Touchscreen replacement tools

The work will require:

• 🔧 Screwdriver kit: cross-haired PH00 flat-to-connector.
• 🔥 Dryer or thermo-air station (power of at least 800 W).
• 📱 Plastic blades/mediators (metallic can scratch the body).
• 🧲 Screen suction cup (diameter 5-7 cm).
• 🔌 Tweezers (for working with plumes).
• 🔥 soldering iron (if the plume is soldered; power 30-40 W).
• 🧴 Clay. B-7000 double-scotch 3M 9448A.
• 📐 Scalpel or stationery knife (to clean glue residues).

In addition, the following may be useful:

• 🔋 External battery (to test a battery-free screen).
• 📸 loope USB-microscope (to check soldering).
• 🧤 Antistatic bracelet (protection against static electricity).

If there is no soldering iron, and the plume is soldered, you can use a solderless connector (worth it). ~500 rubles. It attaches to the old connector and allows you to connect a new plume without soldering, but this is a temporary solution - over time, contact may deteriorate.

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Before disassembling, take a picture of the location of all the plumes and screws. This will help to avoid errors in the assembly, especially if you are repairing the Redmi for the first time. 9A.

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

Redmi's disassembly process 9A It takes 1-2 hours to follow the instructions carefully so as not to damage the flexible plumes.

Step 1: Turn off and prepare the phone

• 🔌 Turn off the phone and remove it. SIM-memory-card.
• 🔥 Heat the hair dryer back cover around the perimeter for 2-3 minutes (temperature) ~60°C. This will soften the glue.
• 📱 Tap the cover with a plastic blade, starting at the bottom corner (near the charging connector).

Step 2: Shutting off the battery

• 🔧 Unscrew 10 screws fixing the metal plate over the battery.
• 🔌 Carefully disconnect the battery connector with a flat screwdriver. Don't pull the plume, it breaks easily!
• 🧲 Remove the metal plate and put it aside.

Step 3: Dismantling the Old Screen

• 🔥 Warm up the screen on the edges (temperature) ~70°C, time 3-5 minutes).
• 📱 With a suction cup, lift the screen up and slowly separate it with plastic shoulder blades. Start at the top edge.
• 🔌 Disconnect the touchscreen plume (it is under metal protection).

Step 4: Install a new screen

• 🧴 Apply a thin layer of glue B-7000 perimeter.
• 📱 Carefully attach the screen, combining the holes for the speaker and camera.
• 🔧 Connect the touchscreen plume (if you need soldering - use flux) RMA-223 solder Sn63Pb37).

Step 5: Assembly and testing

• 🔌 Connect the battery and check the screen (sensor, backlight, colors).
• 🔧 Twisting all screws and install the back cover.

If the screen does not work after assembly:

• 🔌 Check the connection of the plume (it may not be fully inserted into the connector).
• 🔥 Make sure to put a sleeve in the place of the sleeve (if it is soldered).
• 📱 Reboot your phone – sometimes the sensor wakes up after a reboot.

⚠️ Attention: if the screen flickers or pushes buttons spontaneously after the replacement, the problem may be in the touchscreen controller on the motherboard.

5. Common Mistakes and How to Avoid Them

Even experienced masters sometimes make mistakes when replacing touchscreen with Redmi. 9A. Here are the most common:

1. Damage to battery plume

The plume goes from battery to motherboard and often breaks when it's not neatly disconnected.

• 🔧 Use a plastic spatula, not a metal spatula.
• 📱 Pull the connector on the side, not pull up.
• 🛠️ If the plume is broken, it can be restored by soldering or replaced (cost) ~300 rubles).

2. Uneven screen heating

If the glue doesn't warm enough, the screen will come off in "pieces," risking damaging the plumes.

• 🔥 Use a temperature-adjusted dryer (optimally 60–70)°C).
• 🕒 Warm up each side for 2-3 minutes.
• 🧊 Do not overheat - at a temperature above 90°C can damage the liquid crystal layer.

3. Dust hitting the screen

Dust or debris under the glass will cause black dots or creak when pressed.

• 🧹 Work in a clean, well-lit place.
• 🧴 Use a sticky tape to remove glue residues.
• 🔍 Before installing a new screen, check the frame for the presence of mowing mouses.

4. Bad ration of the plume

If the touchscreen plume is soldered, a poor connection will lead to "floating" touches or complete inoperability of the sensor.

• 🔥 Use flux without washing (for example, RMA-223).
• 🔧 The soldering iron should be 30-40 W with a thin sting.
• 🕒 Let’s cool the rations for 2-3 minutes before testing.

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The most common reason for a sensor to fail after replacement is poor plume contact. Always check its connection first!

6. Testing and calibration of the new screen

After replacing the touchscreen, you must check:

• 🖥️ Sensor performance: Open Settings → System system → The phone. → Equipment Test (or use the Touch Screen Test app).
• 🎨 Color rendering: Compare shades with another phone (on Redmi) 9A Often there are screens with a cold or warm tint).
• 🔦 Backlight: are there any dark spots or uneven glow at the edges.
• 🔊 The speaker and microphone (located next to the screen).

If the sensor is not working properly (for example, the presses are offset), calibrate:

1. Download the Touchscreen Calibration app from Google Play.
2. Follow the instructions on the screen by clicking on the specified points.
3. Reboot the phone.

If the calibration problem persists, it's possible that the screen is defective or the plume is not tightly connected. 9A Sometimes it helps to reset to factory settings (but do a data backup in advance!).

To check for multi-touch gestures, use ##36446337## in the dialer. In the menu that opens, select Multi-Touch Test and check if all touches are recognized.

7. Cost of repair: independently vs. service center

Consider the costs under different scenarios:

Self-repair is beneficial if:

• 💰 You already have tools (dryer, soldering iron, screwdrivers).
• 🕒 You're not limited in time.
• 🛠️ You have experience with electronics.

Contacting the service is justified if:

• 🔧 I need a job security.
• 🔥 You are afraid of damaging the motherboard.
• 📱 Phone warranty (self-repair cancels it).

Average price of replacement of touchscreen in services in Russia (2026):

• Moscow: 3,500–5,000 ₽.
• Regions: 2,500–4,000 ₽.
• Xiaomi Official Service: 4,500–6,000 ₽ (But they use original parts).

8. Alternative solutions: if the replacement did not help

In rare cases, replacing the touch screen does not solve the problem.

1.The part of the screen does not work after replacement

Possible causes:

• 🔌 Poor plume contact (check the connector on the motherboard).
• 🛠️ Damage to the touchscreen controller (chip replacement required).
• 📱 Marriage of a new screen (return to the seller).

2.The screen flickers or spontaneously presses buttons

What to do:

• 🔧 Check the integrity of the screen for microcracks.
• 📱 Update the firmware through Fastboot (instructions for 4PDA).
• 🔌 Replace the touchscreen plume (worth it) ~500 rubles).

3.The phone does not turn on after replacement

Probable reasons:

• 🔋 Not connected battery connector (check contacts).
• 🔥 Short circuit during soldering (multimeter diagnosis is needed).
• 🛠️ Damage to the motherboard (required repair in the service).

If you've exhausted all options and the problem remains, it may be a power controller or a graphics chip, in which case repairs will cost more than replacing your phone (from 7000 rubles).

FAQ: Frequent questions about replacing the touchscreen with Redmi 9A