A situation where a modern Xiaomi or Redmi suddenly turns off and immediately turns on again can unbalance any owner. This phenomenon, often called a “bootloop” or cyclical reboot, can occur at the most inopportune moment: during an important call, play or even standby. If your Xiaomi smartphone begins to behave in this way, you can not ignore the problem, as this can indicate both a software failure and serious hardware malfunctions.
In this article, we will take a look at why the phone goes into an endless startup cycle, and offer step-by-step troubleshooting instructions, how to tell a software bug from a hardware failure, whether to carry the device into service or whether you can handle it yourself, and 80% of the time, the problem is with overcrowded memory or system file conflict, not with a motherboard breakdown.
Before we get to the complex manipulations, we need to make a basic diagnosis of the state of the device, and often the cause of chaotic behavior of the MIUI or HyperOS operating system is a newly installed application or incorrect update.
Programmatic conflicts and memory problems
The most common reason for spontaneous reboots is internal memory overflow. When free disk space runs out, the Android operating system cannot create temporary files and work with the cache correctly, which leads to a crash of processes. System processes begin to conflict with each other, trying to free up resources, which causes the device to restart.
The second common scenario is application conflict: If you install a program from an unverified source or update software that is not optimized for your version of MIUI, it can cause instability, especially with applications that have deep access to the system, such as launchers, antiviruses or memory cleaners, in which case the phone can restart immediately after a particular application is launched.
To solve the problem with memory and software, follow the following steps:
- 🧹 Go to Settings. → Memory and free up the minimum 2-3 GB of free space.
- 📱 Remember which apps were installed before the problem occurred and remove them.
- 🔄 Check for updates for all installed programs in Google Play.
Sometimes the cause is damage to system files after a failed update or failure to write data, in which case a simple cache cleaning may not help, and a deeper intervention in system settings will be required.
Power button problems and mechanical damage
If there are no software bugs, you should pay attention to physical buttons. Mechanical sticking of the power button is a common reason that Redmi or Poco constantly reboots. Moisture, dust or small debris can get inside the case, causing the power button contact to close, and the device perceives this as a command to reboot.
In addition, mechanical damage after a fall can lead to the plumes to move away or damage to the internal components of the board. Even if the screen is intact, an internal microcrack can cause a short circuit at a certain position of the phone, in which case the device can go into the receptacle when shaken or pressed on the back cover.
Check the status of the power button:
- 🔘 Press the button several times – it should have a clear tactile response and click.
- 👂 Listen: is there any extraneous crunch or a feeling of sand inside the mechanism.
- 🧐 Inspect the ends of the body for dents that can push the button.
☑️ Diagnostics of the power button
If the power button is stuck, do not try to disassemble the phone yourself if you do not have experience. It is better to gently tap your finger on the end near the button or blow with compressed air, but this does not guarantee success.
Failures in the battery and power system
Battery wear is a natural process that can cause a smartphone to run unsteady. When the battery loses its capacity, it can't produce the required current at peak times, such as when a camera or heavy application is launched. The voltage drops dramatically, and the protection system initiates an emergency shutdown or reboot.
The problem may also be the power controller or the oxidation of the battery contacts, and if the phone not only reboots, but also shows the wrong percentage of charge or turns off at 20-30%, this is a sure sign of problems with the power system. In winter, the cold can also cause such failures in older batteries.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Reboot when the camera starts | Battery voltage drawdown | Battery replacement |
| Turn off in the cold | Depreciation of AKB chemistry | Careful exploitation or replacement |
| Cyclical rebut on the logo | Critical discharge or failure of software | Prolonged charging or flashing |
| Percentage charge jumps | Uncalibrated controller | Calibration of the battery |
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Try to get it out. SIM-card and memory card (if any) Sometimes a damaged microSD card causes the system to reboot constantly when you try to read it.
Errors after updating the firmware or ROOT-rights
Installation of informal firmware, receipt ROOT-If the system is modified in a way that is not properly protected or unlocked, the phone will go into an endless restart. MIUI Sometimes they contain errors, especially in the early stages of production.
Users experimenting with custom recavators (TWRPs) and patches must be prepared for the system to stop booting. The conflict between bootloader and system partition versions is a classic bootloop cause. In such cases, returning to the factory version of the software is often the only way out.
What to do if the problem started after the update:
- 📉 Try booting into Safe Mode to turn off third-party mods.
- 💾 Make a full backup of data if the phone is even sometimes turned on.
- 🛠 Consider rolling back on the previous firmware version via Fastboot.
What is Bootloader and How Does It Affect Reboots?
How to Enter Recovery and Safe Mode
Diagnostics and recovery requires you to go into special modes of operation of the phone: Recovery mode allows you to reset or flash, and Safe Mode loads the system with disabled third-party applications, a key step in determining the nature of the malfunction.
To enter Recovery mode on most Xiaomi models, you need to turn off the phone and press the button combination. Usually it is a power button and a volume button. Hold them until the logo or recovery menu appears. If the phone responds to commands in this menu, then the hardware (screen, touchscreen, main board) is fine.
Combinations of buttons for entering modes:
Recovery Mode: Power + Volume Up
Fastboot Mode: Power + Volume Down
Safe Mode: Hold the off button on the lock screen (depending on the MIUI version)In Safe Mode, the corner of the screen usually displays the message "Safe Mode," and if the phone is stable and does not restart, then one of the apps you installed is to blame, and you only have to delete them one by one until the problem disappears.
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If in Recovery mode the phone is also rebooted or the menu does not appear at all, there is a high probability of hardware breakdown (motherboard, plumes).
Full reset (Hard Reset) and flashing
If software methods fail, a radical but effective tool is the Wipe Data, which will bring the phone back to factory status by removing all user data, settings, and applications, often addressing problems caused by deep file system errors.
It's important to understand that when you reset, the phone will look like new. So if you can, back up your contacts and photos to the Mi Cloud or your computer. You can start the reset process through the Recovery menu by selecting Wipe Data → Wipe All Data.
⚠️ Attention! Complete data cleanup is irreversible. All photos, messages and apps will be deleted without recovery.
In cases where even resets don’t work, you need to completely reflash the device from your computer, using the Mi Flash Tool and the official.tgz firmware. This method is more complex and requires drivers and PC skills, but it allows you to restore even badly damaged software.
⚠️ Warning! Fastboot flashing can lock your device if your Mi Account isn't untied in advance, or cause you to lose warranty.
When the help of a service center is needed
There are a number of symptoms in which self-repair is useless or dangerous, if the phone is warming up when it is turned off, has a swollen battery or smells of burning, immediately stop trying to turn on, and help specialists need if the phone falls into a cyclic reboot immediately after moisture hits.
Hardware problems, such as CPU dumps (often after Xiaomi crashes with Snapdragon chips), require professional soldering and microscope diagnostics.
Please contact the service if:
- 🔥 The phone is very hot in the area of the processor.
- 🔋 The battery is swelled and pushes the cover or screen out.
- 💧 The device came into contact with water or high moisture.
- 📉 The phone can't see. SIM-Cards or Wi-Fi modules after resetting.