Your Xiaomi smartphone has started to behave strangely: it turns on for a few seconds, then immediately turns off, and sometimes even refuses to start? This problem is familiar to many owners of devices of the brand – from budget Redmi to flagship Mi or even the most popular ones. POCO. The reasons for this behavior can be found both in hardware malfunctions (battery, plumes, power button), and in software failures (firmware, loader, application conflict). In this article, we will analyze all possible scenarios, give clear instructions on diagnosis and troubleshooting, and also tell you when to contact the service center.
It's important to understand that if the phone turns on and off, it's not always critical. In 60 percent of cases, you can solve the problem yourself without a soldering iron and specialized tools, but there are also red flags that are dangerous to ignore, like a bloated battery or traces of oxidation on the board, and we've isolated them separately so you can quickly assess the risks.
This article is relevant for all Xiaomi models, including the latest lines of 2023-2026: Redmi Note 13 Pro+, Xiaomi 14 Ultra, POCO F6 Pro and others: Instructions are universal, but some devices may need to be refined (for example, logging into Fastboot on older models is different).
1. Diagnostics the problem: why Xiaomi is switching on and off
Before you start repairing, you need to determine exactly what is causing the cyclic reboot. Here are the key signs that will help narrow the search:
- 🔋 The phone is only turned on on on charging → battery or power controller problem.
- 🔄 Logo. Mi/POCO It appears and disappears in a cycle. → loader-to-fix.
- 📱 The screen is flashing, but the system is not loading. → malfunction of the display plume or motherboard.
- 🔥 The phone is warming and turning off → processor overheating or short circuit.
- 🛠️ The problem arose after a fall/hit → mechanical damage.
The simplest test is to connect your phone to charge and observe its behavior:
- If the charge indicator appears on the screen, but the phone does not turn on further - the battery or firmware is to blame.
- If there is no reaction at all (even on charging), a malfunction of the motherboard or power connector is possible.
- If the phone turns on but turns off after 5-10 seconds, check the power button and plumes.
You can use Fastboot mode to get a deeper diagnosis, and you can log in to it.
- Turn off your phone (if it responds to buttons).
- Press the power button. + Decrease in volume by 10-15 seconds.
- If there was a screen with Mi Bunny and the inscription Fastboot - the board is alive, the problem is more software.
- If there is no reaction - malfunction of hardware (power, board, plumes).
Only on the charger.|Cyclically rebooting.|Heats and turns off.|It doesn’t respond to the buttons at all.|Other-->
2. Program causes: failure of firmware, loader, applications
In 40 percent of cases, it's not hardware that's to blame, but software, and let's look at the typical scenarios and how to fix them.
Failure of the bootloader (Bootloop)
If Xiaomi phone gets stuck on the Mi logo or POCO It's rebooted in a loop, it's called a bootloop:
- 📱 Failure to update the firmware (especially through OTA).
- 🔧 Manual interference with system files (e.g., deleting applications through the ADB).
- 🛠️ Install custom firmware (for example, LineageOS) with errors.
Decisions:
- Hard Reset: Enter Recovery (Squeeze Power) + Volume up. Select Wipe Data → Wipe All Data (volume button navigation, confirmation - power button) After reset, the phone should boot in its pure form.
Fastboot flashing through Fastboot
- Download the official firmware for your model from the Xiaomi Firmware website.
- Connect your phone to your PC in Fastboot mode.
- Use the Mi Flash Tool to install the firmware (instruction below).
Download the Mi Flash Tool|Install the drivers ADB/Fastboot|Unpack the firmware in a folder without Cyrillic|Disable the antivirus (can block the process)|Charge your phone at least to 50%-->
Application conflict or viruses
If the phone turns on but turns off after a few minutes of work, it may be to blame:
- 🤖 High resource consumption application (such as games or background services).
- 🦠 A virus or malicious software that blocks the system.
- 🔄 Automatic reboot due to a failure in settings (e.g., Automatic restart enabled in the developer).
How to check:
- Download your phone to Safe Mode (hold the power button) → long tap on "Switch off» → «Restarting in Safe Mode»).
- If your phone is stable in Safe Mode, remove the recently installed apps.
- Check your phone with an antivirus (such as Malwarebytes or Dr.Web).
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If the phone turns off when a particular app is launched (like a camera or game), try clearing its cache in the settings (Settings) → Annexes → [Name of name] → Warehouse → Clear the cache).
Failure after update (OTA)
Updates by air (OTA) — The most common reason for bootloop on Xiaomi in 2026, especially when it comes to devices with unlocked bootloader or custom firmware:
- Try to roll back to the previous firmware version via Fastboot.
- If the rollback does not help, do a full reset (Wipe Data in Recovery).
- In extreme cases, reflash the phone using the Mi Flash Tool (instructions in the next section).
What if the Mi Flash Tool can't see the phone?
3. Hardware causes: battery, power button, charge
If the software methods didn't work, the problem is hardware. Let's look at the most vulnerable components.
Wear or damage to the battery
The battery is the first suspect if the phone:
- 🔋 It only turns on on charging, but turns off when the cable is turned off.
- 📉 Shows 0% charge immediately after disconnection from the network.
- 🔥 He was swelling (seeing the deformed back cover).
How to check the battery:
- Connect your phone to charge and observe the indicator. If the charge is jerking (it goes, it stops) - the battery is faulty.
- Use the AccuBattery app (if your phone is even slightly working) to check the battery status, and a health score below 70% is critical.
- Disassemble the phone (if you have experience) and inspect the battery for bloating or oxidation of contacts.
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A bloated battery is dangerous! Don't try to puncture it or bend it. If it's damaged, it can ignite. Better replace it in service right away.
Decisions:
- 🔧 Replacing the battery is the only reliable option, costing Xiaomi in 2026: from 1,500 to 4,000 rubles (depending on the model).
- 🔌 Temporary solution: If the phone only works on charging, use it in this mode, but do not leave it unattended (risk of overheating).
Failure of the power button or plume
If the phone turns on on its own or turns off when you press the case, the problem may be:
- 🔘 Sticky/broken power button (often after falling or getting moisture).
- 📶 Damaged button plume (especially relevant for the Redmi Note series).
How to check:
- Try turning on your phone without a power button: plug in to charge and hold Volume Up + Decrease in volume 10-15 seconds.
- If the phone is turned on, the button is faulty.
- Try to move the button carefully: if the phone reacts to touch (on/off) – the problem is in the mechanism.
Decisions:
- 🔧 Replacement of the power button – in the service it will take 30-60 minutes and cost 800-2000 rubles.
- 🛠️ Trail repair – if the contacts are problematic, the craftsman can re-sweeten them without completely replacing them.
Problems with the motherboard
The most serious case is a malfunction of the board.
- 🔥 The phone is very warm even when turned off.
- 💥 There is a smell of burning or traces of oxidation / blackening on the board are visible.
- 📵 The phone does not respond to charging or buttons.
Frequent causes:
| Reason. | Symptoms | Decision |
|---|---|---|
| Short circuit. | The phone warms up, discharges quickly, turns off when connected to charging | Diagnostics in the service, replacement of damaged components |
| Oxidation of contacts | Unstable operation, the phone turns on once | Cleaning the board with ultrasound or alcohol (only in the service!) |
| Damage to the power controller | The phone does not charge or only charges in a certain position. | Replacement of the controller (from 2 000 rubles) |
| Processor malfunction | The phone is turned off when loaded (games, camera) | Flashing or replacing a chip (expensive, often impractical) |
⚠️ Warning: If the board is damaged, don't try to repair it yourself! improper soldering or cleaning can permanently put the phone out of order. contact Xiaomi's authorized service or a verified repair center.
4. Step-by-step instruction: flashing Xiaomi through Fastboot
If you’ve determined that the problem is software, the most reliable way to bring your phone back to life is to flash it over the Fastboot, POCO mi.
What you need:
- 💻 Computer on Windows 10/11 (for Mac/Linux instruction).
- 🔌 Original. USB-cable (better from the set).
- 📱 Firmware for your model (download from the official website).
- 🛠️ The Mi Flash Tool (download here).
Step 1: Installation of drivers
Without the right drivers, your computer won’t see your phone in Fastboot mode.
- Download and install Android SDK Platform-Tools (required for use) ADB and Fastboot).
- Connect your phone to your PC in Fastboot mode (press Power + Volume Down).
- Open Device Manager on PC, and find a device with an exclamation point (usually Android Bootloader Interface).
- Update the driver manually by specifying the folder with the platform-tools.
Step 2: Preparing the firmware
The firmware for Xiaomi is usually supplied as a.tgz or.zip archive.
- Unpack the archive in a folder without Cyrillic and spaces (for example, C:\Xiaomi\ROM).
- There should be a folder with.img files inside (for example, a file file, boot.img, system.img etc.).
Step 3: Firmware with Mi Flash Tool
Now let's get to the firmware itself:
- Run the Mi Flash Tool on behalf of the administrator.
- Press Select and select the folder with unpacked firmware.
- Connect your phone in Fastboot mode (should be determined as to how to use it) COM-port).
- At the bottom, select firmware mode: Clean All – Full Cleaning (recommended when crashes) Clean All and Lock – Cleaning + Save User Data - Save data (not always stable).
Flash
After successful firmware, the phone will restart automatically.
⚠️ Note: If the firmware is interrupted (for example, due to a shutdown) USB), The phone can turn into a brick. Don't interrupt the process and use a laptop with a charged battery in case the lights go out.
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If the phone still doesn’t turn on after firmware, try repeating the process with another firmware version (for example, an older one).
5. When to contact the service: signs of serious malfunctions
Not all problems can be solved on your own, but here are some cases where you can trust the professionals:
- 🔥 Phone warms to 50°C+ switched off → circuit.
- 💧 Liquid intake (even if the phone is dry») → contact-oxidation.
- 📵 Complete lack of response to charging and buttons → Possible malfunction of the power controller.
- 🔧 Damage to the charging connector (for example, after unsuccessful soldering).
- 🔋 Bloated battery → urgent replacement is required.
Cost of repair in the service (2026):
| Type of repair | Cost (ruble) | Timeline |
|---|---|---|
| Battery replacement | 1 500 – 4 000 | 30-60 minutes |
| Repair/replace the power button | 800 – 2 000 | 1-2 hours |
| Cleaning the board from oxidation | 2 000 – 5 000 | 1-3 days |
| Replacement of the power controller | 3 000 – 8 000 | 2-5 days |
| Processor/memory soldering | 5 000 – 15 000 | 3-7 days |
Where to repair:
- 🏢 Xiaomi’s official service centers are reliable, but expensive and long-term (guarantee is maintained).
- 🔧 Local repair shops are faster and cheaper, but check reviews.
- 📦 Self-repair – only if you have experience with a soldering iron and multimeter.
⚠️ Warning: If the phone is warranty, don't open it yourself! This will void the warranty. Contact the Xiaomi Authorized Service with a check.
6.Prevention: How to avoid repeated failures
To prevent Xiaomi phone from turning on or off spontaneously in the future, follow these guidelines:
- 🔋 Keep your battery healthy: Do not discharge your phone to 0%. Use original chargers. Avoid overheating (do not leave it in the sun or near heat sources).
- 📱 Update firmware carefully: Do not install bat versions MIUI, If you're not sure if it's stable, back up the data before you update!
- 🛡️ Protect your phone from physical damage: Use a cover and protective glass; avoid falls and bumps (especially at the corners where the board is located); Do not drop the phone in water (even if it is waterproof»).
- 🔍 Monitor system status: Regularly check the temperature of the processor (app) CPU Remove unused applications that may conflict with the system. Do not install software from unverified sources.
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If you frequently experience crashes after updates, turn off automatic update installation in the settings: → The phone. → Updating the system → ⚙️ → Auto-update → Turn it off.