Xiaomi Redmi Note 8 Pro is one of the most popular smartphones in the budget segment, but even it is not immune to unpleasant surprises. Owners often face a problem when the device begins to spontaneously reboot: whether during games, then when watching videos, then for no apparent reason at all. In some cases, reboots occur cyclically, not even allowing you to unlock the screen.
The reasons for this behavior can be found in software failures (from conflicting applications to damaged firmware) and hardware malfunctions (battery problems, overheating, damage to the motherboard). In this article, we will analyze all possible scenarios, learn how to diagnose the problem and fix it without going to the service center - where possible.
Important: if the smartphone is rebooted immediately after turning on or hangs on the logo MI, This may indicate a critical firmware error or damage to the boot partition, and in such cases, radical measures will be required, such as flashing through Fastboot or EDL.
1. Software reasons for reboots: from applications to firmware
In 60 percent of cases, software is the culprit, and let's start with the obvious: conflicting apps and updates.
Stability killer apps:
- 🎮 High Demand Games (Genshin Impact, PUBG Mobile, Call of Duty. They overload the Mediatek Helio processor. G90T, causing overheating and emergency reset.
- 📱 Optimizers and Cleaners (Clean Master, DU Speed Booster: These utilities often conflict with system processes. MIUI.
- 🔄 Background apps (Facebook, Instagram, instant messengers) can run cyclical tasks that cause disruptions.
- 🛠️ Modified APK (hacked games, pirated versions of software, often containing malicious code or incorrect permissions.
How to check? Launch your smartphone in safe mode (hold the power button) → long tap on "Switch off» → «Safe Mode. If the reboots have stopped, it's third-party software. If it hasn't, it's deeper.
Updates MIUI Android can also be a source of problems, for example, after updating to the Internet. MIUI 12.5 Many users complained about accidental reboots due to bugs in the kernel of the system. and the upgrade to Android 11 on some devices led to a conflict with the drivers Mediatek.
To rule out this cause:
- Check the current firmware version in Settings → About Phone → MIUI version.
- Look for bug information for your version on forums (4PDA, XDA Developers).
- If the update is recent, try to roll back to the previous version via Fastboot.
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Before rolling back the firmware, back up the data through Settings → Additionally. → Backup and reset. Use Mi Cloud or local storage.
2.Overheating: Why the Redmi Note 8 Pro turns off from high heat
Mediatek Helio G90T — A powerful processor, but prone to overheating, especially in a plastic case.°C, the safety mechanism is triggered, and the device is emergency restarted to prevent damage to the chipset.
The main causes of overheating:
- 🔥 Long-term loads: games, video rendering, high-resolution streaming.
- ☀️ External factors: direct sunlight, hot weather, being near heat sources.
- 🔋 Charging. + load: simultaneous play and charging increases heating by 2 times.
- 🧊 Clogging of ventilation holes with dust or dirt (relevant for devices older than 1.5 years).
How do you check the temperature? Install the app. AIDA64 or CPU Monitor and watch the indicators in the section Sensors. Critical values:
| Component | Normal temperature | Critical temperature |
|---|---|---|
| Processor (Helio G90T) | 30–45°C | >65°C |
| Battery | 25–40°C | >50°C |
| Screen. | 20–35°C | >45°C |
| Charging controller | 30–40°C | >60°C |
Decisions:
- Remove the cover during games or charging.
- Use the original power supply (not fast charging if you play).
- Limit it. FPS in games through graphics settings (for example, in PUBG Mobile set to 30 FPS 60 FPS).
- Clean the charging connector and vents with compressed air.
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If the smartphone is rebooted only when charging, the problem may be a faulty charger or a damaged power controller on the board.
3. Battery problems: bloating, wear, short circuit
The 4,500 mAh battery in the Redmi Note 8 Pro is designed for 500 to 800 charge cycles, and after 2-3 years of use, its capacity drops by 30 to 40 percent, and internal resistance increases, which leads to:
- 🔋 Sudden shutdowns at a charge level of 20-30% (the device “thinks” that the battery is discharged, and turns off).
- ⚡ Cyclic reboots when connecting / disabling charging.
- 💥 Bloating of the battery, which presses on the motherboard and causes short circuits.
How to diagnose:
- Check the battery status in AccuBattery (Health section). >50% battery to be replaced.
- Inspect the case: If the screen or back cover is curved outward, the battery is swollen.
- Try to move your smartphone while charging, and if you reboot when you change position, you're in contact with the battery board.
Warning: If the battery is swelling, stop using the device immediately. The risk of fire or damage to the board is extremely high!
What happens if you ignore the battery?
The solution is one: replacing the battery.The cost of the original battery for the Redmi Note 8 Pro (article) MB-J41) — About 1500-2000 rubles. Do not skimp on cheap analogues: they often have a smaller capacity and fail faster.
4. Firmware conflicts: bootloop, corrupted system files
If the smartphone is only loaded before the logo MI And then it reboots (called bootloop), and the problem is that the system files are corrupted:
- 🔄 Failed update MIUI (interrupted loading, failure during installation).
- 🛠️ Incorrect rooting or installation of custom recavery (TWRP).
- 📱 Installation of unofficial firmware with errors.
- 💻 Connect to PCs with utilities like Mi Flash or ADB (For example, when trying to unlock the loader).
Symptoms:
- The device does not go beyond the Redmi screensaver.
Solutions (from simple to complex):
- Hard Reset: Hold the Volume Up + Power for 10 seconds, then select Wipe Data from the Recovery menu.
Download the official firmware for your model with [en.miui.com](https://en.miui.com/download.html)
Install Mediatek and ADB drivers on PC
Unlock the bootloader via Mi Unlock Tool (if not unlocked)
Connect your phone to your PC in Fastboot mode (keep Volume down + Power)
Backup your data (if the phone is still turned on)-->
⚠️ Attention: Flip-through EDL Without experience, it can lead to a complete loss. IMEI or NVRAM. If you are not sure, contact the service.
5. Hardware malfunctions: from board to power button
If the software methods didn't work, the problem is the hardware.
Damage to the motherboard:
- 💧 Moisture ingestion (even if the phone hasn't sunk, condensation or high humidity can oxidize the contacts).
- ⚡ Voltage surges when charging with uncertified adapters.
- 🔨 Mechanical damage (falls, impacts) The southern bridge or the power circuit of the processor is more often affected.
Faulty power button:
- If the button is stuck or oxidized, the phone may “think” it’s being held and reboot constantly.
- Check: press the button several times, if you feel a backlash or it is difficult to press, you need to replace.
Problems with working memory (RAM):
- Defective chips LPDDR4X They can also cause blue screens (in MIUI They look like a black screen with vibrations and reboot.
- It can be diagnosed using a memory test in AIDA64 (section Tests).
Diagnostics of hardware problems:
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Reboots when vibrating or ringing | Short circuit in the dynamics or vibrator | Replacement of the faulty module |
| The device is turned off when pressed on the body | Damage to battery plume or board | Diagnostics in the service (disassembly will be required) |
| Reboot only when connecting headphones | Closing in the 3.5 mm connector or on the board | Cleaning the connector with alcohol or replacement |
| The smartphone does not turn on after a fall | Separation or crack in the board | Components soldering (in the service) |
⚠️ Warning: if you suspect damage to the board, don't try to disassemble the phone yourself.Redmi Note 8 Pro has fragile plumes, and careless disassembly can exacerbate the problem.The average cost of repairing the board is between 3,000 and 8,000 rubles.
Conflicts with SIM-card SD-card
Few people know, but it's broken. SIM-The card or memory card may cause reboots, because the system is constantly trying to read the damaged sectors, which leads to failures.
Signs:
- 📶 The phone is rebooted when you call or connect to the network.
- 💾 Reboots occur when reading/write files on SD-map.
- 🔄 In the system logs (viewed through ADB) bug mmc0: error -110 or SIM card removed unexpectedly.
How to check:
- Extract. SIM-map SD-If you stop rebooting, you can use the phone for 1-2 days.
- Try inserting. SIM-If there's a card in another phone, if there's a malfunction, the card's broken.
- Format. SD-map FAT32 via PC (use the official utility) SD Card Formatter).
If the problem is in the slot SIM-The card, its repair will cost 1000-1500 rubles. If the motherboard is to blame (damaged controller). SIM) — The price will increase to 4000-6000 rubles.
7. Viruses and malware
Malware rarely causes reboots, but it cannot be completely eliminated. Some viruses (such as Trojan.AndroidOS.Loapi) can:
- 🕵️♂️ Overload the processor with hidden cryptocurrency mining.
- 📴 Block system processes, causing failures.
- 🔄 Modify firmware files, which leads to bootloop.
How to detect:
- Check your phone with antivirus (Dr.Web, Kaspersky Mobile, Malwarebytes).
- Run Settings. → Annexes → Permits and look for suspicious programs with administrator rights.
- Look at the active processes in AIDA64 (partition → Processes: High-consumption unknown services CPU — reason.
If the virus is detected:
- Remove the infected app.
- Perform reset to factory settings (Settings) → Additionally. → Backup and reset).
- If the virus has damaged system files, reflash your phone via Fastboot.
8.When to contact the service: signs of serious malfunctions
Not all problems can be solved by yourself. Contact the service center if:
- 🔥 Phone overheats to 70°C and above even in plain.
- 💥 The battery is swollen or it shows signs of corrosion.
- 🔧 Reboots are accompanied by extraneous sounds (squeaking, crackling) - this may indicate a short circuit.
- 📵 The device does not turn on at all (no reaction to charging, no indicator lights up).
- 🔄 After flashing the problem persists, and in the logs there are errors EMMCDL or PMIC (Indicate damage to the power controller).
Average prices for repairs in services (Moscow, 2026):
| Service | Cost (₽) | Date(s) |
|---|---|---|
| Battery replacement (original) | 1500–2000 | 1 |
| Diagnostics of fees | 500–1000 | 1 |
| Repair/replacement of the charging connector | 1200–1800 | 1–2 |
| South bridge soldering | 4000–7000 | 3–5 |
| Firmware through EDL (reconstructive IMEI) | 2000–3500 | 1–2 |
⚠️ Warning: if you are offered a fee repair for 1000-1500 rubles, this is a reason to be wary. High-quality soldering of chips requires expensive equipment (infrared station, microscope) and takes several hours. Too cheap repairs often mean “crutches” that will extend the life of the phone for 1-2 months.