The situation when Xiaomi smartphone suddenly goes out, reboots or goes into an endless cycle of inclusions, is familiar to many owners. This can occur at the most inopportune moment: during an important call, during the game, or even when the device is in standby mode. Cyclical reboot is a protective mechanism of the system or a symptom of a hardware failure, ignoring which can lead to complete failure of the gadget.
Before you panic and carry your phone to a service center, you need to make a thorough diagnosis. In most cases, the problem lies in a software conflict, overcrowded memory or battery failure, but there are more serious reasons related to the motherboard or power controller.
In this article, we will look at all possible scenarios, from simple lack of charge to complex cases of moisture, learn to distinguish between software "glitch" and physical damage, and learn what steps you can take yourself to save the device.
Programmatic failures and overheating of the system
The most common reason Xiaomi Redmi or POCO shuts down is a software glitch.The MIUI or HyperOS operating system can encounter a critical error in drivers or system files, causing the processor to initiate an emergency shutdown, often after a failed update or installation of an application from an unverified source.
Another important factor is overheating. Modern processors are equipped with thermal sensors that force the device to shut down when it reaches critical temperatures, and if you notice that the phone turns off during resource-intensive tasks such as rendering video or running heavy games, the heat shield probably went off.
To diagnose a software state, you should pay attention to the behavior of the interface before turning off. If the screen begins to "freeze", colored stripes or artifacts appear, this may indicate a video driver failure or damage to the display plume. In such cases, trying to reset the settings may be ineffective, since the problem lies deeper.
How to check the temperature of the processor?
To rule out the software nature of the malfunction, try running the device in Safe Mode, in which only system applications are loaded, allowing you to identify conflicting software.
⚠️ Warning: If the phone turns off immediately after the "Mi" or "Redmi" logo appears, do not try to charge it in the cold or in direct sunlight.Extreme temperatures can permanently disable the chemical structure of the battery.
Diagnostics of battery and charging system
If Xiaomi shuts down at 20-30% charge or shows percentage spikes (falling rapidly from 50% to 5%), the problem almost certainly lies in the battery.Lithium-ion cells degrade over time, losing capacity and inability to give off the peak current needed for the processor to work.
Also worth checking is the charging connector. A loose USB Type-C or Micro-USB port can cause a brief loss of contact, which the system perceives as battery extraction, resulting in the phone instantly reacting by shutting down. Oxidation of contacts inside the connector is also a frequent cause of unstable operation.
Pay special attention to the originality of the charger. Using cheap analogues without a power controller can lead to voltage surges, which the phone's charge controller perceives as a threat and blocks the device from working. Sometimes cleaning the charging port from pile and dust with a non-conductive brush helps.
To extend the life of the battery, try not to discharge the smartphone to zero regularly. Deep discharge is destructive to modern battery chemistry. If the phone was dead for several months, the controller could block charging, and to "rock" will require special equipment.
Problems with the on button and plumes
The mechanical power button is the element that is most physically affected. In Xiaomi models with a side-fingerprint scanner, the button combines two functions, which increases the load on the mechanism. Western buttons, oxidation of its contacts or a plume break causes the phone to spontaneously turn off or reboot.
If the button is stuck when it's on, the phone will constantly try to reboot, entering what's called a bootloop, and you can tell that by its behavior: the screen goes out, vibrates, the logo appears, and the cycle repeats endlessly.
In some cases, the problem is solved by carefully cleaning the button with alcohol or replacing it. However, if the button plume is integrated into the bottom board (pallet), you may need to replace the entire node.
☑️ Diagnostics of the switch
It is also worth checking if the plume connecting the main board to the lower board is damaged, and when it falls, this plume often departs, which leads to loss of communication with the volume and on buttons, causing chaotic behavior of the system.
Failures after update and memory overflow
Updating firmware is a delicate process. MIUI There's an interruption or a mistake in recording sectors, the phone can go into permanent reboots, and newer versions of shells can be optimized worse than before! <
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Overflowing internal memory is another stability killer: When space runs out, the system has nowhere to create the temporary files and cache needed to run applications, which leads to friezes and emergency shutdowns. Try to keep at least 3-5 GB of space free.
If the problem started immediately after the update, try clearing the partition cache or performing a full reset, however, if the phone doesn't even have time to boot to the desktop, you'll need to log in to Recovery mode.
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Before any firmware update, be sure to back up your important data to the Mi Cloud cloud or your computer, which will save your photos and contacts in the event of a crash.
Sometimes the culprits are heavy widgets or “live wallpaper” that consume too much RAM, and turning off visual effects can temporarily stabilize the old device.
Hardware malfunctions of the motherboard
When software methods are powerless, the hardware is suspicious, and the chip or processor is a serious malfunction, often after falls or extreme heat, in which case the phone may turn on, display the logo and turn off, or not respond at all to the switch on button.
Short circuits in the power supply chain also cause a protective shutdown, which can happen due to moisture, even in the form of condensation, or the use of poor-quality accessories, capacitors may swell or fuses may burn.
Diagnosing these problems requires a multimeter and a power supply unit with a current measurement. If the current jumps or is at zero when connected to a power source, you can not do without the intervention of an engineer. Self-repair at home without experience and equipment can lead to the final death of the device.
| Symptoms. | Probable cause | Difficulty of repair |
|---|---|---|
| Turns off in the cold. | Battery degradation | Low (replacement of the battery) |
| Cyclical reboot | Button sticking / Software failure | Medium |
| Turns off when the camera starts | Lack of current / Problems with payment | Tall. |
| The screen is blown off, but the phone is working. | Display or plume malfunction | Medium |
Recovery methods: from reset to flashing
If you've determined that the problem is software, the first step is to reset the settings to factory settings, which will delete all user data and return the system to its original state, and before that, be sure to save important files.
A more radical method is to flash through your computer using the Mi Flash Tool, which allows you to completely rewrite the system partition, eliminating corrupted files, but it will require an unlocked bootloader, which can take from 7 to 168 hours of latency.
In Recovery mode, you can try clearing the cache (Wipe Cache) or perform a full reset (Wipe Data). Be careful: choosing Connect with MIAssistant without knowing can lead to unpredictable consequences.
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Wipe Data removes ALL data from your phone, and photos, contacts, and apps will be lost forever if you don’t make a backup.
If none of the software methods worked and the phone continues to behave unstable, the probability of hardware failure is as high as 90%, in which case further attempts to "cure" the software are useless.