A situation where your Xiaomi suddenly turns off and back on can take you by surprise.This is not just an annoyance, but also a potential signal of serious problems in the software or hardware of the device.
In this article, we will discuss in detail why the smartphone reboots on its own and what steps you need to take to fix the bug, learn how to distinguish a software failure from physical damage, and get step-by-step instructions to restore the normal operation of the system.
Ignoring these symptoms can cause a complete loss of data or motherboard failure. A systematic bootloop is often a sign of a critical kernel failure or processor overheating, so it is important to act quickly and consistently to check for every possible cause.
The main program causes of instability
The problem is often software conflicts: MIUI or HyperOS operating systems can conflict with installed applications or their own services, and if the phone starts to behave strangely after the update, it is likely that the patch or corrupted system files were inserted incorrectly.
One common cause is a crowded cache or lack of free memory: When a system partition is critically filled, the operating system cannot create the temporary files needed to run the background processes, causing a forced restart.
Also worth paying attention to recently installed applications: malware or poorly optimized software can cause memory leaks, which leads to a crash of the system.
To check, run your smartphone in safe mode, which will disable all third-party applications and see if they are the cause, and if the device is stable in safe mode, delete the last installed programs.
Problems with power and battery
The hardware, particularly the power supply system, often becomes the culprit of spontaneous shutdowns. If the battery is worn out, it may not give enough voltage under load, even if the indicator shows 40-50% charge, which the power controller perceives as a critical error and initiates a reboot to protect the components.
Check the status of the charging cable and the power supply. Unstable voltage at the input can cause surges, which the system considers to be a power outage. Use only original accessories or certified analogues with support for the fast charging protocol.
⚠️ Warning: If the phone only reboots when connected to the charger, stop using this cable immediately.Possible fault of the charge controller, which can lead to fire.
In the cold season, lithium-ion batteries lose capacity faster, and if you're outside in temperatures below -10°C, abrupt shutdown is a normal chemical reaction of the electrolyte, so warm the device in your pocket.
You can diagnose the battery using an engineering menu or special applications, and pay attention to the battery health parameter and the number of recharge cycles.
The effect of overheating on system stability
Modern Snapdragon and Dimensity processors installed in Xiaomi have powerful protection against overheating. If the core temperature exceeds a critical threshold (usually 85-90 ° C), the trottling mechanism is triggered, and then an emergency shutdown or reboot follows.
Most often, overheating occurs during games, recording video in 4K or using navigation with the screen on. A tight case can prevent heat from being removed, making the situation worse.
Dust stuffed into the speaker or charging connector also impairs heat sink, and regular cleaning of ports helps maintain the device's normal temperature.
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Use the Throttling Test CPU app to check at what load level the CPU frequency reset and possible reboot are occurring.
If the phone is hot to the touch even in a simple one, the heat paste between the processor and the radiator may have dried up, which requires disassembling the device and replacing the thermal interface in the service center.
Update conflicts and MIUI failures
Updating firmware is a delicate process, and if a write error occurs during the installation of new files, the system can go into a reboot cycle, especially when switching between major versions of Android, for example, from 12 to 13.
Check if your version of MIUI is “raw” and users often report bugs on forums immediately after the global version is released, in which case it is better to wait for a fix or roll back to the previous stable build.
To eliminate the accumulated type of software errors, it is recommended to reset the settings. Before that, be sure to back up the data in the Xiaomi Cloud or on your computer.
☑️ Actions before resetting settings
Sometimes the problem is solved by simply cleaning the cache partition through the Recovery menu.This won't delete your personal data, but will clear temporary system files that may have been corrupted.
Hardware malfunctions and physical damage
If software methods didn't work, consider a physical breakdown: a device fall could cause plumes to detach or microcrack on the motherboard, and a vibration when you call or press the screen can cause contact that provokes spontaneous reboot.
Moisture is the enemy of electronics №1.Even if the phone didn't sink, high humidity could cause the contacts to oxidize.Visually this may be invisible, but the leak currents will cause the gadget to behave chaoticly.
It's also worth checking the power button. If it's locked or it's in bad contact, the device may think you're holding your finger on the button, and reboot. Clean the button carefully with alcohol or compressed air.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Resetting with shaking | Removal of battery contacts | Replacement of connector or battery |
| Cycle on the Mi logo | Firmware failure (Bootloop) | Fastboot flashing through Fastboot |
| Turn off in the cold | Battery wear and tear | Battery replacement |
| Restart in games | Processor overheating | Cleaning from dust, replacing heat paste |
Diagnostics board requires special equipment. If you notice the bloating of the battery (the body is deformed, the screen is raised), you can not operate the device categorically.
How do you check the sticking buttons?
Methods of diagnosis and resetting of settings
For deep diagnostics, use Recovery mode. To get into it, turn off your phone and press the power and volume button. In the menu that appears, select Wipe Data (if you're ready for a full reset) or Reboot for a normal reboot.
If the phone is rebooting constantly and does not allow you to enter the menu, try Safe Mode. Usually, when you turn on, you need to press the volume button when the Mi logo appears. In this mode, only system applications are downloaded.
In case of complete failure, flashing through the computer will help, this will require the Mi Flash Tool utility and the firmware image in.tgz format. This method restores the software part by 100%, eliminating errors in the system files.
⚠️ Warning: When flashing all data will be deleted, make sure the battery is at least 60% so that the process does not stop halfway through.
Remember that complex hardware problems, such as a power controller malfunction or a processor dump, are almost impossible to fix on their own, and you will need professional soldering and microscope diagnostics.
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If the factory reset did not eliminate the reboot, the 90% probability problem is hardware in nature.