Why Xiaomi is rebooting itself: diagnosing and troubleshooting

When your Xiaomi smartphone suddenly goes out and turns on again, it can throw anyone off balance. Especially annoying if it happens in the middle of an important conversation or during a game. Cyclical reboot can be caused by both software conflict and physical damage to the device components. Owners of Redmi Note, Poco and Xiaomi Mi flagships often experience this phenomenon after upgrading the system or installing a “heavy” application.

In most cases, the problem lies in overflowing RAM or conflict versions of MIUI and HyperOS. The system tries to allocate resources for background processes, can not do this and initiates an emergency restart to protect the kernel. Sometimes the culprit is overheating of the processor, which forcibly shuts down the power to avoid burning out the crystal.

Don't panic and bring the gadget to the service right away. In 80% of cases, the problem can be solved by software methods or replacing the charging cable. Below we will discuss in detail the algorithms that will help to return the phone to normal life without losing data.

Software failures and conflicts of MIUI shells

The most common reason for spontaneous reboots is operating system errors. The MIUI shell, or the new HyperOS, is based on Android, which is sensitive to the integrity of system files. If you recently updated your phone over the air, there may have been a data record failure, leading to a Dalvik cache decommissioning. This causes the system to constantly reboot, trying to fix bugs on the fly.

Third-party launchers and widgets also affect, and some of the themes downloaded from unofficial sources contain malicious code or are simply not optimized for your firmware version, and the conflict of library versions causes SystemUI to crash, which visually looks like a flashing screen and a subsequent restart.

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Before installing any themes or launchers, create a restore point or backup data on Google Drive to avoid losing information when crashes occur.

To diagnose software errors, you should pay attention to the mode of operation, if the phone goes into rebuke only when you start a particular game or application, then the problem is incompatibility of the software, in which case cleaning the cache of the problematic application through settings helps.

Problems with the power button and physical elements

Physical wear and tear of buttons is a classic problem for smartphones that are over two years old. The power button has a limited pressing resource. Over time, the contact group oxidizes or falls into place. If the button is stuck in the internal position, it constantly sends a signal to restart or turn off the device, which often happens after moisture or dust enters the case.

The simple way to check the status of the button is to gently press your finger or tap on the end of the device lightly, and if the screen goes out or the phone starts vibrating without you, it's a mechanical problem. In Redmi models with a side-fingerprint scanner, this button is combined, which increases the load on the mechanism.

• 🔘 Western buttons due to deformation of the body after falling.
• 💧 Oxidation of the contacts of the button plume due to high humidity.
• 🧩 Displacement of the plume with poor-quality previous repairs.
• 🧹 Getting small debris or sand under the key.

Sometimes it helps to develop the button carefully (multiple clicks), but this is a temporary solution. For a complete repair, you will need to replace the plume of the buttons or the entire body (frame) if the button is soldered into it. ADB-Teams, but it takes skills.

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If the phone reboots by lightly touching a button or pressing the screen in its area, the probability of mechanical failure is more than 90%.

Memory shortage and storage overflow

Critical internal memory filling is one of the most underappreciated causes of unstable work: When disk space is less than 1-2 GB, the system has nowhere to create temporary files and swaps (RAM) permanent memory (ROM) work in conjunction, and the lack of space in the storage blocks the work of background processes, causing a crash of the system.

This is especially true for models with 64 GB of internal memory, which after a year of use are clogged with messenger cache (Telegram, WhatsApp), photos and app updates. The system tries to record the error log file, can not do this and decides to restart.

To solve the problem, you need to free up space. Use the built-in Cleanup utility or file manager. Delete the.Trash folder in the Gallery where deleted photos have been stored for the last 30 days. It is also worth clearing the cache of heavy applications manually through settings.

Incorrect operation of the battery and charger

Power surges are the enemy of electronics. Once the battery has run out of power, it can't produce a steady current under load. When the processor needs peak power (camera, games), the battery voltage drops dramatically, and the power controller initiates an emergency shutdown or reboot.

The culprit may also be an unoriginal power supply or a damaged cable, cheap charging without proper filters and gives a dirty current, causing a malfunction of the touchscreen and system. If the phone reboots during charging or immediately after disconnecting from the network, check the components.

It's important to check the battery status through the engineering menu ##6485## In the phone app, pay attention to the parameters. MB_06 (battery health and MF_02 (Charging cycles. If your health is lower 70%, battery-change.

The effect of overheating on system stability

Xiaomi’s current Snapdragon and Dimensity processors are very productive but prone to heat, and the devices have thermal protection built in: when a critical temperature (usually around 85-90°C) is reached, the system is forced to restart or shut down to prevent the components from physically destroying.

Overheating is often the case when you use a navigator in the sun, you record long-term video in 4K, or you play high-resolution games, and if you notice that reboots only happen in these scenarios, the problem is the temperature, and the dust inside the case worsens the heat sink, making things worse.

To reduce the temperature, remove the case, reduce the brightness of the screen and close the background applications. In extreme cases, you can use applications to control the frequency of the processor (root rights are required), limiting maximum performance.

⚠️ Warning: Never put a heated smartphone in the refrigerator or freezer! a sharp temperature drop will lead to condensation inside the case, which is guaranteed to cause short circuit and corrosion of the board.

Complex cases: viruses and damage to system partitions

While Android is less susceptible to viruses than Windows, threats exist. - Miners and Trojans APK-Files from unverified sources can load the processor up to 100%, causing permanent restarts, and the virus can damage system files, making it impossible to download.

A more serious problem is damage to the boot or recovery partition, which can happen when you fail to root or interrupt the update, in which case the phone can get into a bootloop, an endless cycle of reboots, where it does not even reach the desktop.

To treat complex viruses, a complete memory cleanup is required via Recovery Mode. To repair damaged partitions, the device often needs to be flashed through the computer using the Mi Flash Tool utility and official firmware.

Algorithm of actions in cyclic reboot

If your phone is already in a reboot cycle and you can't get on the menu, you need to act quickly. First of all, try to boot into Safe Mode. To do this, when you see a Mi or Redmi logo, press the volume button. If the phone boots and it works steadily, then it's the third-party app's fault.

If the problem persists in safe mode, or the phone doesn't even let it in, it will require a factory reset, which will delete all data, but return the system to factory condition. To do this, you need to go to the Recovery menu: turn off the phone (if possible) and press Volume Up + Power.

From the Recovery menu, select a language (usually English), then go to Wipe Data -> Wipe All Data. Confirm. Once completed, select Reboot. If that doesn't work, then you only have to flash it over your PC or contact a motherboard diagnostics service center.

⚠️ Warning: Hard Reset permanently deletes all photos, contacts and files. If you have the opportunity to log in for even a minute, be sure to back up to Mi Cloud or your computer before resetting.

FAQ: Frequently Asked Questions