Xiaomi sensor doesn’t work: why and how to return the reaction to touch

You picked up a Xiaomi smartphone but the screen suddenly stopped responding to touch? This problem is familiar to many owners of the brand's devices - from budget Redmi to flagship Mi and POCO. Causes can range from software failures to physical damage to the display. In 80% of cases, the malfunction is fixed without visiting a service center, but it is important to correctly diagnose the source of the breakdown.

In this article, we'll look at all the possible scenarios: why Xiaomi's touch screen doesn't respond to touch, how to distinguish a hardware defect from a software defect, and what to do in each case. You'll find step-by-step instructions with photos, video examples and method compatibility tables for different models, and if the problem is more serious than it seemed, you'll learn how to minimize the risks when you access the service.

Before you start the repair, answer 3 key questions:

1. Does the screen not respond fully or respond partially to touch (e.g., only in a certain area)?
2. Was there a fall before the breakdown, moisture or the installation of unofficial software?
3. Is the display on (the image is visible) or is the screen completely black?

1. Diagnostics: hardware or software problem?

The first step is to determine whether the malfunction is due to physical damage (touchscreen, plume, motherboard) or software failure (firmware, drivers, application conflict) and this will save time and eliminate unnecessary actions.

Do a quick test:

• 🔄 Reboot your smartphone forcefully (press Power + Volume up for 10-15 seconds). If the sensor is running after the reboot, the problem is in the software.
• 📱 Connect the mouse to OTG (if the screen is turned on but not responding to touch). If the mouse cursor is moving, the touchscreen or its controller is defective.
• 🎧 Check the response to other types of input: Volume buttons, fingerprint scanner, Face ID. If so, the problem is localized to the touch layer.

Pay attention to the symptoms of physical injuries:

• 💧 Moisture under the screen (visible stains, condensate) is a sign of contact oxidation.
• 🔴 Colored stripes or artifacts on the display – damage to the matrix or plume is possible.
• 📉 Partial reaction (only half the screen is working) is typical for touchscreen detachment.

2. Software methods of sensor recovery

If the diagnostics show that the problem is not hardware, try these methods, which are suitable for all Xiaomi models based on MIUI or Android One (for example, Mi A1/A2/A3).

Reset sensor settings via engineering menu

MIUI has a hidden menu for touchscreen calibration.

1. Open the Phone app.
2. Enter the code ##6484## (on some models, #3646633##).
3. Select Touch Screen Test → Calibration.
4. Follow the instructions on the screen (touch the crosses at the specified points).

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If the engineering menu does not open, try entering the code through the Calculator app (enter the sequence of numbers and press "=").

If calibration doesn’t help, move on to more radical measures.

Clearing the cache and system data

Clogged cache or conflicting applications can block touch processing.

Remove newly installed apps | Clear cache to Settings → Apps → All apps | Turn off Gestures in Settings → Additional → Special features | Check free space (should be ≥1 GB)

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1. Go to Settings → Memory → Clean up and delete unnecessary files.
2. In Settings → Applications, find the MIUI Launcher and clear its cache.
3. Turn off all navigation gestures in Settings → Display → Full-screen mode.

If the problem remains, move on to resetting the settings.

2.3 Hard Reset (Hard Reset)

This is an extreme measure that will delete all data on the device. Make a backup through Settings → About phone → Backup or Mi Cloud.

Instructions for discharge:

1. Turn off your smartphone.
2. Press Power + Volume up until the Mi logo appears.
3. In the Recovery menu, select Wipe Data (use volume buttons for navigation, power for selection).
4. Confirm the action and wait for the completion.

3. Hardware malfunctions: when without repairs can not do

If the software methods didn’t work, the problem lies in one of three components:

1. Touchscreen (touch screen layer) – cracks, detachment or damage to the controller.
2. Display plume – oxidation, breakage or poor contact.
3. Motherboard - failure of the touchscreen controller (less often).

Self-repair is possible only when replacing the touchscreen or plume. To diagnose the board, specialized equipment (multimeter, microscope) will be required.

3.1 Replacement of the touchscreen with their own hands

If the screen cracks or only reacts to strong presses, you will need to replace the touch layer. For Xiaomi, this will cost 1,500-4000 ₽ depending on the model.

• 🛠️ Tools required: plastic mediators, sucker, hair dryer (for softening glue), screwdriver T3/T4.
• 📄 Instructions: Each model is unique (see YouTube for "your Xiaomi disassembly model").
• ⚠️ Risks: damage to the plume, matrix or battery when unspecified opening.

The cost of original touchscreens for popular models:

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Replacement of touchscreen on models with AMOLED- screens (for example, Mi 11 or POCO F3) is better to entrust the service - a high risk of damage to the matrix during heating.

Checking and replacing the display plume

The plume connects the touchscreen to the motherboard, and it's a malfunction.

• The screen periodically “stops” or reacts with a delay.
• Touch works only from a certain angle.
• The display appears colored stripes when pressed.

To verify:

1. Remove the back cover and battery.
2. Disconnect the display plume from the board and inspect the contacts for oxidation.
3. Wipe the contacts with alcohol and connect the plume back (no distortions!).

⚠️ Warning: Do not use metal tools to clean contacts - this can damage the tracks on the board. It is optimal to use a wooden toothpick soaked in isopropyl alcohol.

4.Moisture and oxidation: how to save the smartphone after water

If Xiaomi has stopped responding to touch after contact with water, act quickly – you have 24 to 48 hours to prevent corrosion. Even if the smartphone “survived” after bathing, the oxidation of contacts can manifest in a week.

Algorithm of action:

Turn off device immediately |Remove SIM- card and memory card |Do not turn on or connect to charging |Put in silica gel (or rice) packet on 24 for hours

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After drying:

1. Take apart the smartphone and inspect the board for the presence of white plaque (a sign of oxidation).
2. Clean the contacts of the display plume and the battery connector with alcohol.
3. Check the touchscreen – if there is no reaction, you will need to replace the plume or the entire display module.

For IP53-protected models (such as the Redmi Note 11 Pro+), the risk of damage is lower, but not excluded when submerged; Xiaomi does not officially guarantee protection against liquids - even for "waterproof" devices.

5. Features of repair for different Xiaomi series

Xiaomi’s smartphone design varies depending on the series, which affects the complexity of repairs and the availability of spare parts.

5.1 Redmi Note and POCO: budget models with simplified assembly

Pros:

• 🔧 Easy to disassemble (back cover attachment to latches).
• 💰 Cheap parts (a touchscreen for the Redmi Note 10 costs from 1,500 ₽).
• 📚 Many guides on YouTube and forums (4PDA, XDA).

Cons:

• ⚠️ Fragile plumes (often torn by careless autopsy).
• 🔋 Battery glued - high risk of damage when removed.

Mi and Mi Mix: flagships with complex design

Features:

• 🔥 AMOLED- Screens require caution when heated (risk of matrix damage).
• 🛡️ In some models (for example, Mi 11 Ultra) touchscreen and the matrix soldered — replacement only in the assembly.
• 💡 High refresh rate (120 Hz) displays are sensitive to low-quality parts.

For flagships, it is recommended to contact authorized Xiaomi service centers - self-repair may deprive the warranty (if it is still valid).

6.When to contact the service: signs of serious breakdowns

If none of these methods worked and the sensor still doesn't work, the problem may be deeper.

• 🔌 The screen does not respond even after the touchscreen and plume have been replaced (maybe the motherboard has been damaged).
• 🔥 On the board, burnt elements or traces of a short circuit are visible.
• 📉 The display flickers or shows artifacts (a matrix or graphics chip defect).
• 🔋 The smartphone doesn't turn on at all (power problem or BIOS).

Cost of repair in the service:

⚠️ Warning: Before contacting the service, check if the warranty period has expired (usually 12 months for Xiaomi). If the warranty is valid, do not disassemble the smartphone yourself - this will void it. You will need a check and a box from the device for warranty repair.

7.Prevention: How to Prevent Sensor Problems

To avoid repeated breakdowns, follow these recommendations:

• 📱 Use a protective glass and case with shock absorbing corners (e.g. Spigen Tough Armor).
• 💧 Avoid moisture — even if the model has IP53 protection, it doesn't guarantee 100% safety.
• 🔋 Don't use cheap chargers - they can cause voltage surges that damage the board.
• 🔄 Update MIUI regularly – newer versions fix touch-processing bugs.
• 🛠️ Do not drop your smartphone on hard surfaces (especially with the screen down).

For models with AMOLED- screens (e.g. Mi 12 or POCO F4), avoid prolonged exposure to direct sunlight – this can lead to burnout of the matrix and incorrect sensor operation.

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If you often use your smartphone in the cold (below -10 ° C), let it warm up before turning on - a sharp temperature drop can cause the touchscreen to detach.

FAQ: Frequent questions about Xiaomi's broken sensor