The situation when the screen Xiaomi Mi 9T stops responding to touch or completely goes out and the phone remains on, is one of the most stressful for the owner. gadget can buzz from incoming messages, but access to the interface is not available, and the standard termination of work through the menu is impossible. At this point, it is critically important to quickly de-energize the device to prevent overheating, battery draining to zero or system freeze.
There are several proven ways to force reboot and shut down that do not require a display to be serviceable, and these methods are based on the hardware capabilities of the Snapdragon 730 platform installed in this model and the specifics of the MIUI shell. Below we will discuss in detail the algorithms that will help you solve the problem without the need to immediately contact the service.
The easiest and safest option is to use a physical button combination that is sewn into the power management hardware layer. Even if the operating system is completely got stuck, the power controller will continue to respond to mechanical stress. It is important to understand the difference between a conventional shutdown and a reset, because in a non-working display, it is the hard reset that interests us.
To start, try the classic method, which works 90% of the time on Xiaomi smartphones, and you need to find the power button on the right side of the case, hold it for a long time, 10 to 20 seconds, and don't let go of your finger right away, even if you feel a slight vibration, it can only be a response from the tactile engine, not a reboot.
If the phone vibrates but the screen remains black, keep holding the button. At some point the device must force the shutdown, and then, if you don't release the button, automatically start the turn-on cycle. Once you feel the second vibration or see the Mi logo (if the matrix is partially functioning), release the button. This action initiates a Hard Reset power supply that ignores the state of the software shell.
⚠️ Note: Do not use this method if there is an important system update process or large amounts of data stored in the background, as abrupt interruption can damage firmware files.
Sometimes the standard hold of the power button does not work because of the deep freeze of the touchscreen controller or the display module itself. In this case, a key combination comes to the rescue, which force the smartphone to restore mode or simply restarts the core of the system. For Xiaomi Mi 9T, a bunch of volume and power buttons is relevant.
Press both the Lower Volume and the Power button. Hold them together for about 10-15 seconds. This combination is often used to log into the Fastboot, but with prolonged retention, it can also cause a power reset. If the screen is completely black and doesn't even glow with the lights, this method is the most effective way to "revive" the logic of the device.
In situations where mechanical buttons are triggered or are not working properly, you can try software management methods if you have the ability to connect the phone to a computer. This will require the ADB (Android Debug Bridge) utility, which will only work if the phone has previously been enabled debugging via USB and the computer has already been authorized as a trusted device.
Connect Xiaomi Mi 9T PC-only USB-Open the command line on your computer in the folder with the installed ADB. Enter the command to reboot:
adb rebootOr a command to force shutdown:
adb shell reboot -pThis method is the most secure for the file system, because it simulates a regular shutdown, but if the screen doesn't burn at all, you won't be able to confirm the request to authorize the connection on the phone itself, so it only works if you set the trust settings previously.
Why isn’t USB debugging working?
If the screen is broken but the touchscreen is partially working, or you see an image but can't press the "Switch off" button, you can use an external manipulator. Xiaomi Mi 9T is equipped with a USB Type-C port that supports peripheral connectivity via the OTG (USB On-The-Go) adapter.
You'll need a USB Type-C adapter on USB-A and a normal computer mouse. Connect your mouse to your smartphone. If you can see it, you'll have a cursor on your screen. With your mouse, you can unlock your phone if you know the pattern lock or pin code, and shut it down properly through the menu. That's the only way to make a soft switch without losing data when you have a damaged touchscreen.
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Use a USB-C adapter with two ports (USB and charging) to connect your mouse and put your phone on charge at the same time, as using a mouse quickly consumes the battery.
The table below shows the main combinations of actions and their result for the Mi 9T model:
| Method | Combination | The result | Requirements |
|---|---|---|---|
| Forced reset | Food (15-20 seconds) | Dramatic power drop | Screen failure |
| Fastboot mode | Food + Volume Down | Entrance to the loader | Screen failure |
| ADB Team Team | adb reboot | Staff reset | Included debugging |
| USB Mouse | Through the OTG adapter | Cursor control | Whole display (partially) |
Once you've turned your phone off, you should evaluate the situation before turning it back on, if there was a one-time problem, there may have been a memory failure or an application conflict, and if the screen stopped working again after turning it on, the problem is hardware.
A common reason for the screen failure on the Xiaomi Mi 9T is the pullback of the display plume after a fall or impact, in which case turning off and on can temporarily restore contact, but this is only a temporary solution, and it is worth checking whether the touch layer is blocked due to static electricity or poor-quality charger.
☑️ Checking before going to the service
There is a myth that completely draining the battery is a good way to turn off the phone. Deep discharge of the Xiaomi Mi 9T lithium polymer battery can cause it to bloat and inability to charge later without special equipment.
If none of these methods worked, and the phone continues to buzz or warm, the problem is probably the power controller or the circuit board short circuit, and the only solution is to disassemble the device and turn off the battery plume manually, requiring special tools (suction cup, mediators, Torx screwdrivers) and skills.
⚠️ Attention: Independent disassembly Xiaomi Mi 9T A sloppy opening can damage the mechanism of the selfie camera, which will require an expensive replacement of the entire module.
To sum up, the most efficient and quickest way to turn off Xiaomi Mi 9T If the screen is not working, the power button is held for a long time, this method does not require additional equipment and is safe for electronics when executed correctly. ADB or OTG-mouse is an auxiliary option for fine-tuning or storing data.
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Long-term retention of the power button (15-20 seconds) is a universal method that helps in most cases of system freeze or touchscreen failure on Xiaomi smartphones.