When the sensor on Xiaomi doesn’t work, it always takes you by surprise, turning a modern gadget into a useless piece of plastic. The screen can completely go out, stop responding to touch or start opening applications chaoticly. In most cases, the problem lies in a software failure that can be fixed on its own without resorting to the services of a service center.
The first thing to do when a malfunction is detected is to analyze the behavior of the display. If the touchscreen is delayed or only works in certain areas, this often indicates the need for calibration or application conflict. However, if the screen is completely black and does not show signs of life, even with incoming calls, it may be a hardware failure of the plume or the module itself.
It's important to not panic and to perform a number of diagnostic procedures consistently. The combination of volume and power buttons often allows you to enter Recovery mode even when the sensor is not working. The next steps will depend on whether you can control the device through the recovery menu or the external periphery. Below we will discuss all possible scenarios and solutions.
Diagnostics: software failure or screen breakdown
Before disassembling or repairing a device, it is necessary to determine the nature of the malfunction. Software failure often occurs after a failed system update or installation of dubious software from unverified sources. In such cases, MIUI can conflict with the drivers of the touch screen, causing temporary inoperability.
If the problem is hardware, you may notice physical signs of damage: cracks in the glass, black spots (pressure spots) or stripes on the matrix. It is also worth checking whether the case overheats. When the processor is hot, it can throttling-it, which leads to lags and the sensor fails to respond to commands.
⚠️ Warning: If the screen is broken or smoke/smell of smoke is coming from the device, further attempts to turn on may be dangerous.
For the initial check, try to perform a forced reset. Press the power button and hold it for a while. 10-15 If you have vibration and you don't have images, it's a problem in the matrix. If the phone vibrates but doesn't respond to touch, it's probably a problem in the digitizer).
Basic methods of troubleshooting
The easiest and often most effective way to bring the touchscreen back to life is to simply reboot the system, clear the RAM and restart the system services responsible for input. If a normal shutdown is impossible due to a broken touchscreen, use hardware buttons.
The second important step is to check the protective film or glass. Cheap accessories can create static electricity or simply have a layer of glue that is too thick to block the senses of the capacitive sensor. Remove the protection and wipe the screen with microfiber to exclude the effects of dirt and grease.
- 🔌 Disconnect the charger: cheap power supplies can cause interference, which makes the touchscreen “glutch” or completely fails.
- ❄️ Cool the device: If the phone is hot, put it on a cold surface (not in the freezer!) 5-10 minutes to stabilize the temperature.
- 📱 Remove the case: Some dense cases can press on the edge of the screen, creating false presses or blocking the work of the edges of the display.
It's also worth checking if In-Pack mode is on. This feature locks the screen when the proximity sensor is closed. If the sensor is contaminated or taped, the system can think the phone is in your pocket and ignore your touches. Clean the top of the screen near the speaker.
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Try connecting your phone to your computer via USB, and if the PC recognizes the device and you can manage the files, then the motherboard is intact, and the problem is with the display module.
Sensor calibration and engineering menu
If basic methods didn't work, the touchscreen calibration may have gone wrong, and there are diagnostic tools built into the MIUI shell, but access to them is sometimes hidden, and first try entering the secret code in the Phone app, even if the screen is not responding well.
Dial ##6484##. This will open the CIT (Customer Information Test) menu, and you will find a item associated with Touchpanel or TP Test. If you swipe across the screen in test mode, you will see which areas register clicks and which do not.
☑️ Actions in the Engineering Menu
In some cases, resetting the calibration through the developer settings helps. Go to Settings → About Phone → Tapping on MIUI 7 times. Then, in the advanced settings, find "Input" and select "Calibration." Follow the instructions on the screen, carefully placing dots in the specified places.
⚠️ Note: Do not use third-party apps to calibrate from the Play Market unless absolutely necessary.They often require root rights and can make changes to system files, which will lead to bootloop.
Safe Mode Checking and Conflict Removal
Often the reason that the sensor on Xiaomi does not work is because of third-party applications that intercept screen control, such as launchers, ad blockers or screen recording software, and to eliminate their impact, you need to start your smartphone in safe mode.
To enter this mode, you usually need to press the turn off button on your desktop and then (long hold) the "turn off" icon on the screen. If the sensor does not respond, try this method: turn off the phone, turn it on, and when the Mi or Redmi logo appears, press the volume down button.
In Safe Mode, only system applications are running, and if that's the state where the touchscreen is alive and working properly, then it's a problem with the software, and you'll need to remember which apps you've recently installed and delete them.
- 🗑️ Remove the latest installed programs: especially those that require screen access permissions.
- 🛡️ Check with antivirus: Run the built-in Security scanner to search for malware.
- 🔄 Reverse Updates: If the problem occurs after the system update, try removing the latest update through the Recovery menu.
How to remove the application without a touch screen?
Hardware causes and inspection of plumes
When software is exhausted, you have to look at hardware malfunctions, and the most common reason is that the display plume is moving away from the motherboard, and this often happens after a fall, even if there is no external damage, and the shock wave could just weaken the connector.
It's also worth considering the wear and tear of the module itself. Over time, the digitizer loses sensitivity, especially around the edges of the screen. If you use your phone for several years without protective glass, microcracks could damage the conductive layer.
The table below shows the main symptoms and their probable causes:
| Symptoms. | Probable cause | Difficulty of repair |
|---|---|---|
| The screen only reacts when pressed hard. | Wear of the digitizer layer | Replacement of the module |
| Chaotic pressing (phantom) | Charging interference or damage to the plume | Medium |
| The screen part is not working (dead zone) | Physical damage to the matrix | Replacement of the module |
| The screen goes out, but the phone is working. | Breakage of the illumination or matrix plume | Tall. |
To check the plume yourself, you need to disassemble the back cover (if it is removable or unstick), gently snap the display connector and reconnect it, making sure the contacts are clean, and the plume is very fragile and easily damaged if handled carelessly.
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If after reconnecting the plume sensor did not work, most likely, the display module failed and requires a complete replacement in the service center.
Reset to factory settings (Hard Reset)
The radical, but often the only way to save your phone from a software bug is to completely reset your data, which will delete all your files, contacts and applications by returning them to your computer. MIUI You only need to do it if the sensor isn't working partially, and you can get on the menu, or if you have a device. USB-mouse.
If the touchscreen doesn't work at all, you can log in to the reset menu via Recovery Mode. Turn the phone off completely. Then press both the power button and the volume button at the same time. Hold them until the Mi logo appears, then release power while you keep the volume.
In the Recovery menu, navigation can be done with volume buttons (up/down) and power button confirmation. Select language (English), then Wipe Data → Wipe All Data. Confirm action. Once completed, select Reboot.
⚠️ Warning: Hard Reset permanently deletes all data. If you don't have a backup in the Mi Cloud or on your computer, photos and contacts will be lost forever.
Once the phone is restarted, it will start as new, and if the sensor does not respond to touch in this mode (check by trying to select a language or connecting a mouse), then there is a 99% probability that the problem is physical and requires replacement of components.