Xiaomi’s touchscreen is not just an interface to interact with, but a key element of device control. When it stops responding to touch, the phone becomes a brick: you can’t open apps, answer a call, or even unlock the screen, and the causes of this malfunction range from software failures to physical damage, and it doesn’t always require expensive repairs.
In this article, we will discuss all possible causes of a broken sensor on Xiaomi (including the Redmi models, POCO, Mi and Black Shark, we'll offer step-by-step instructions for diagnosing and troubleshooting, and we'll also tell you when to contact the service center. MIUI, They can block touches for no apparent reason, and debunk myths about the “magic” repair methods that are often advised on forums.
Primary diagnosis: determine the type of malfunction
Before you start repairing, it is important to understand what exactly you are dealing with.
- 🔘 Complete lack of response – the screen does not respond to any touch, but the image is displayed.
- 🔘 Partial work – responds only to certain areas of the screen (e.g., the top half).
- 🔘 «Floating sensor – touches are recorded with displacement or delay.
- 🔘 Spontaneous taps – the phone seems to “live its life”, opening applications without your participation.
Each of these symptoms indicates a different problem. For example, partial sensor operation is often associated with damage to the plume or matrix, whereas spontaneous pressing can be caused by a software failure or moisture getting under the screen. To narrow down the possible causes, follow the following steps:
- Try unlocking your phone with a fingerprint or facial recognition (if you can unlock it), and if you can unlock it, it's not the screen that's broken.
- Connect the device to the computer by USB. If the computer recognizes Xiaomi and allows you to view files, then the main board works.
- If the call passes (vibration, sound) but the screen does not respond, the problem is localized to the display module.
If the picture is not clear after these manipulations, move to the next section - there we will discuss software recovery methods that help in 60% of cases.
2. Software solutions to the problem
Most sensor malfunctions on Xiaomi are not due to physical damage, but to software failures. MIUI, Install custom firmware or application conflicts. Let's look at the most effective methods.
Forced reset
The easiest way, but often ignored, is that many users try to reboot their phone through the menu, but if the sensor doesn't work, it's impossible.
- Press the power button for 10-15 seconds until the phone turns off.
- Wait 30 seconds and turn it on again with the Power button.
If the sensor is running after the reboot, the problem is that it's a temporary system failure, but if it's a recurring failure, you need to look deeper.
2.2 Resetting settings via Recovery Mode
If the reboot doesn't work, the next step is to reset to factory settings, which will delete all user data, but often solves sensor problems caused by software conflicts, to make a reset without a running screen:
- Turn off the phone (press the power + Volume increase for 10 seconds).
- Squeeze the power. + Increase volume until the Mi logo appears (this is the entrance to Recovery Mode).
- In the recovery menu, select Wipe Data (use volume buttons for navigation and Power for confirmation).
- Confirm the reset and wait for the process to be completed.
☑️ Preparing for resetting through Recovery
⚠️ Note: After resetting via Recovery Mode, the phone may require you to enter the Mi Account data associated with the device. If you do not remember the username / password, it will be impossible to unlock the phone without contacting the Xiaomi service center.
Updating or rolling back firmware
Sometimes the sensor stops working after the update. MIUI. In such cases, it helps to roll back on the previous version or install fresh firmware:
- Download the official firmware for your model from the MIUI Downloads website (choose the Recovery ROM version).
- Rename the file to update.zip Place it in the root folder of the phone (use the computer).
- Go to Recovery Mode (as described above) and select Install update.zip.
If you have custom firmware installed (like LineageOS or Pixel Experience), go back to the official firmware. MIUI — This often solves problems with sensor drivers.
Disable "Mode in the pocket" and other functions MIUI
MIUI It has a few hidden features that can block touch, and one of them is the Pocket Mode, which turns off the sensor when the phone is down, to see if it's activated:
- Connect your phone to your computer and use it. ADB (guideline).
- Adb shell settings put global settings pocket_mode 0
- Reset the device.
Other functions that may interfere with:
- 🔹 Protection against accidental pressing (in screen settings).
- 🔹 Navigation gestures (sometimes conflict with sensor performance).
- 🔹 Adaptive brightness (may affect screen sensitivity).
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If you have access to another Xiaomi phone, try temporarily connecting it to Mi Share and controlling the broken device through the Remote Control app, which will help you change your settings without direct access to the screen.
3. Hardware causes: when the "iron" is to blame
If the software methods didn't work, the problem is probably physical damage, and let's look at the most common hardware malfunctions and how to diagnose them.
Damage to the display plume
The plume is a flexible cable that connects the display to the motherboard, and it can get damaged if you:
- 📱 Phone drops (even from a small height).
- 🔧 Improper disassembly (for example, when replacing the battery).
- 💦 Moisture under the body.
Signs of a damaged plume:
- 🔹 The sensor only works in certain areas.
- 🔹 The screen flashes or colored stripes appear.
- 🔹 Touching is recorded with a delay.
To check the plume, you'll need to disassemble the phone, and if you don't have experience, you'd better go to the service, and self-repairing can damage the motherboard.
Failure of the sensor layer (digitizer)
The touch layer is a transparent film under the glass that records touches, and if it's damaged, the screen can:
- 🔹 Stop reacting completely.
- 🔹 Respond only to a strong push.
- 🔹 Give false positives (for example, spontaneous swipes).
The digitizer often fails after:
- 💥 Screen impacts (even if the glass is whole).
- 🔥 Overheating (for example, if the phone was lying in the sun).
- 🛠️ Poor repair (for example, after glass replacement).
⚠️ Note: If the digitizer is damaged, it can only be replaced with the display module.Separate replacement of the touch layer with Xiaomi is technically possible, but economically impractical - the cost of work often exceeds the cost of a new screen.
Moisture ingestion or oxidation of contacts
Moisture is one of the main enemies of electronics, and even if the phone hasn't sunk, condensation or high humidity can cause the plume or motherboard contacts to oxidize.
- 🔹 The sensor is intermittent (responsive, not responsive).
- 🔹 On the screen appear "divorces" or spots.
- 🔹 The phone spontaneously reboots.
What to do:
- Turn off the phone immediately and remove it. SIM-memory-card.
- Place the device in a silica gel (or rice) bag for 24 to 48 hours.
- Do not turn on your phone until it is completely dry!
If the problem remains after drying, you will need to clean the board with ultrasound or replace damaged components.
Malfunction of the motherboard
In rare cases, a sensor that is broken may be due to damage to the sensor controller on the motherboard, which is one of the most serious failures, because it requires:
- 🔹 Solding chips (cost from 3000 to 10 000 rubles).
- 🔹 Replacement fees (in this case, repairs are often impractical).
Signs of a fee problem:
- 🔹 Sensor is not working, but the screen is glowing.
- 🔹 The phone is not charged or turned on.
- 🔹 Other functions (camera, speaker) also work incorrectly.
| Symptoms. | Probable cause | Cost of repair (approximately) |
|---|---|---|
| The sensor is not working completely, but the screen is glowing. | Damage to plume or digitizer | 1 500 – 5 000 ₽ |
| Partial operation of the sensor (zones) | Detachment of the digitizer or crack in the matrix | 3 000 – 8 000 ₽ |
| Spontaneous tapping, "ghost" touches | Moisture intrusion or controller failure | 2 000 – 15 000 ₽ |
| The sensor only works after heating the phone. | Oxidation of contacts or microcracks on the board | 3 000 – 10 000 ₽ |
4 How to use your phone temporarily without a sensor
If repairs are delayed and the phone is needed urgently, alternative management options can be used.
Connecting the mouse to USB-OTG
Most of the Xiaomi smartphones support USB-OTG, connector USB-That's what a mouse is:
- Buy an adapter. USB-C/Micro-USB → USB (depending on your phone’s connector).
- Connect the mouse to the adapter and the adapter to the phone.
- The mouse cursor will appear on the screen and you will be able to control the phone.
This method works even on a locked screen (if debugging is enabled). USB).
4.2 Management through ADB (for advanced users)
Android Debug Bridge (ADB) — It's a tool for controlling the phone from the computer:
- Install ADB and Fastboot Tools on your computer.
- Connect your phone to your PC and enable debugging. USB (If the screen is still responding).
- In the command line, execute: adb devices (should display your device).
- Now you can send commands, for example: adb shell input tap 500 500 (emulates touch in coordinates). 500x500).
List of useful ADB-command
4.3 Use of Google's voice assistant
If you have Google Assistant on your phone, you can control your voice.
- Say “OK Google” (if the function is activated).
- Say a command, such as “Open the Phone app” or “Enable Bluetooth.”
Limitation: The voice assistant will not be able to unlock the phone if the screen is not fully responsive.
5. When to contact the service center
Not all breakdowns can be repaired by yourself.
- 🔧 You took your phone apart but found no visible damage.
- 💦 The phone fell into the water or was exposed to severe humidity.
- 🔥 On the motherboard, traces of oxidation or burning are visible.
- 📱 Sensor does not work after changing the screen (possibly damaged plume).
How to choose a good service:
- 🔹 Check reviews on Yandex.Maps or 2GIS.
- 🔹 Ask if you have a job guarantee (at least 3 months).
- 🔹 Check whether they use original parts (Xiaomi often put non-original screens with poor color reproduction).
⚠️ Warning: If the phone is warranty, don't open it yourself! Xiaomi will cancel the warranty if there are traces of disassembly.
6.Prevention: How to avoid sensor problems
To make the sensor on Xiaomi last longer, follow these guidelines:
- 🛡️ Use tempered glass and a cover with screen protection.
- 🚫 Avoid overheating (do not leave your phone in the sun or near heat sources).
- 💧 Do not use your phone in wet conditions (bath, swimming pool, rain).
- 🔄 Update regularly MIUI, But don't install beta versions of firmware.
- 🔧 When replacing the battery or screen, contact the professionals.
Also avoid:
- 🔹 Install questionable applications (they may conflict with sensor drivers).
- 🔹 Use of non-original chargers (voltage drops harm electronics).
- 🔹 Strong presses on the screen (especially in the corners where the plume passes).
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Even if the sensor works perfectly, check its sensitivity once a month in the engineering menu (code ##6484##) to help identify problems early.