Xiaomi Redmi 8 is one of the most popular budget smartphones of the brand, but even it is not immune to sudden failures. If your device stopped turning on after discharging, falling or updating the system, do not rush to carry it to the service center. In 60% of cases, the problem can be solved by yourself without having special skills.
In this article, we will look at all the possible reasons why the Redmi 8 does not turn on (from the banal discharge of the battery to damage to the motherboard), and give step-by-step instructions with photos and videos how to bring the phone back to life, and you will learn when to contact the master, and when you can do without repair.
Importantly, if the smartphone is responding to charging (the indicator lights up, vibrates) but does not load beyond the logo, this is another problem that requires a separate solution, and here we focus on cases where the device is completely lifeless.
1. Checking for obvious reasons: charging, battery, button
Before you disassemble your phone or dump your firmware, make sure that the problem isn’t trivial. 9 out of 10 Redmi 8s are revived at this point.
Start by checking the charger and cable:
- 🔌 Connect the phone to another power supply (preferably the original one on the phone). 18W Use a Quick Charge 3.0 cable, because cheap, non-original cords may not transmit enough current.
- 🔋 Try charging your smartphone from a computer or power bank. If the charging indicator lights up, the problem is in the socket or power supply.
- ⏳ Leave your phone charging for at least 30 minutes. Even if the indicator doesn't burn, the battery could run out of charge, and it needs time to minimize the accumulation of charge.
If charging doesn't help, check the power button:
- 🔘 Press and hold the power button for 10-15 seconds. Sometimes the smartphone "hangs" at the level of the power controller.
- 🔧 Carefully tap the phone body near the button (without force!).Perhaps the contacts have oxidized or shifted.
- 🛠️ If the button is "dropped" or not clicking, it will have to be replaced. This is a common problem with the Redmi 8 after a year of use.
⚠️ Note: Do not use power supplies from other devices (for example, from a laptop or tablet) for charging – they can give out an inappropriate voltage and damage the smartphone’s power controller.
Forced reset and recovery modes
If your smartphone doesn't respond to the power button, but you're sure the battery is charged, try a hardware reset, which works even when the firmware is getting stuck.
Instructions for Xiaomi Redmi 8:
- Turn off the phone from charging.
- Press the power button + volume button for 10-20 seconds.
- When the Mi logo appears, release the buttons. The phone should boot into Recovery mode.
From the Recovery menu, select Reboot → Reboot to System. If the phone boots, the problem was a software glitch. If not, move on to the next step.
If the hardware reset didn’t work, try going into Fastboot mode:
- 🔄 Press the power button. + volume-cutting button for 10 seconds.
- 🖥️ Connect your phone to your PC. If the computer makes a sound of the connection. USB-Smartphone is “alive” but requires flashing.
Make sure the battery is at least 20% charged
Shut down all cables.
Clutch the correct button combination
Wait at least 15 seconds-->
3. Battery problems: how to check and what to do
The battery is the most vulnerable spot in the Redmi 8, and after 2-3 years of use, it loses capacity and can completely “die” even if the phone shows 100% charge.
Signs of a faulty battery:
- 🔋 The phone is switched on only from charging, but turns off when the cable is disconnected.
- 🌡️ The body is very hot in the battery area.
- ⚡ The charging indicator flashes or burns unstablely.
- 🕒 Battery life has been reduced to 1-2 hours.
How to check the battery without disassembling:
- Connect the phone to charge and leave for 1-2 hours.
- If the indicator is not on, try to press the case slightly in the battery area (without applying force!).
- If the phone is turned on, but immediately turned off, the battery needs to be replaced.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| It does not turn on, but warms up when charging. | Short circuit in the battery | Urgent battery replacement |
| It only comes on from charging. | Battery wear (capacity < 50%) | Replacement or calibration |
| The indicator flashes but does not load | Problems with the power controller | Diagnostics in the service |
| The phone is off and not responding. | Deep discharge (below 2.5V) | "Swinging" with a special ZU |
⚠️ Warning: If the battery is swelling (the phone's body is deformed) - do not try to turn on the device! This can lead to fire. Remove the battery immediately or take the phone to the service.
4. Fastboot Flashing: When to Do It and How to Do It
If the phone is detected by the computer in Fastboot mode but does not boot, the problem is the firmware, which can happen after a failed update, reset or virus attack.
For the re-flashing, you will need:
- 🖥️ Windows computer 10/11.
- 🔌 Original. USB-cable (better from the set).
- 📥 Fastboot firmware ROM Redmi 8 (you can download it on the official Xiaomi website).
- 🛠️ Mi Flash Tool (also from the official website).
Step-by-step:
- Unpack the archive with firmware in a folder without Cyrillic characters (for example, C:\Redmi8_Fastboot).
- Install the Mi Flash Tool and drivers for Xiaomi.
- Connect your phone in Fastboot mode to your PC.
- In the Mi Flash Tool, click Select and specify the path to the firmware folder.
- Select Clean All mode and press Flash.
- Wait for the process to finish (5-10 minutes) and the phone will reboot automatically.
What if the Mi Flash Tool can't see the phone?
After flashing it back to the factory settings, if the software was the problem, it'll turn on. If it's not, it's the hardware.
5. Diagnostics of hardware malfunctions
If none of the previous methods worked, it's probably a physical breakdown, and here are the most common Redmi 8 malfunctions.
What could have broken:
- 🔌 Power controller, which is responsible for power distribution, and when it breaks, the phone doesn't respond to charging.
- 📱 Motherboard – may be damaged after falling, getting moisture or overheating.
- 🔋 Charging connector - oxidation or break of contacts.
- 📶 Antenna module - rare, but can block the switching on when damaged.
How to diagnose without disassembly:
- 🔍 Light the flashlight on the screen from different angles, and if the image is barely noticeable, the problem is the backlight or the display plume.
- 🎧 If you press the power button and you hear the boot sound, the screen or video controller is faulty.
- 🌡️ Check if the phone warms up when you plug in to charge. If so, it's probably a short circuit on the board.
If you do not have experience in electronics repair, at this stage it is better to contact the service.The cost of diagnostics in official Xiaomi centers is from 500 rubles, repair of the power controller - from 1500 rubles.
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Before visiting the service, take a picture of the phone’s IMEI (on the box or under the battery) to confirm that the device is not blacklisted (for example, after a theft).
6. when to contact the service center
There are situations where self-repair is impossible or dangerous.
Signs of serious breakdown:
- 💥 The phone fell into the water or was subjected to severe vibration (for example, in the washing machine).
- 🔥 The body is deformed, there are traces of burning or melting.
- ⚡ When connected to charging, a crackle is heard or the smell of scorched plastic appears.
- 🔧 You have tried to disassemble the phone before, but something went wrong (screws are torn, the plume is damaged).
What can be done in the service:
- 🔧 Replacement of the battery - from 800 rubles (original) or 500 rubles (analogue).
- 📱 Repair / replacement of the motherboard - from 2000 rubles (depending on damages).
- 🔌 Restoration of the power controller - from 1500 rubles.
- 💧 Cleaning from corrosion after moisture ingress - from 1000 rubles.
Where to look for reliable service:
- 🏢 Xiaomi official centers - warranty for repairs, but more expensive. list on mi.com.
- 🔧 Local workshops are cheaper, but check reviews".
- 🛒 Communications salons (Svyaznoy, MTS) - sometimes taken for repairs, but more often sent to partner centers.
⚠️ Warning: If the phone is warranty (up to 12 months from the date of purchase), do not open it yourself! This will void warranty obligations.
7. How to avoid problems in the future: prevention
To make Redmi 8 last longer without crashes, follow these guidelines:
Operational rules:
- 🔋 Don't discharge your phone to 0%. Optimal charge range is 20 to 80%.
- 🌡️ Avoid overheating (do not leave in the sun, do not play heavy games when charging).
- 💧 Do not use your phone in wet areas (bath, pool), even if it does not fall under water – humidity oxidizes contacts.
- 📱 Update your firmware regularly, but don’t install beta versions. MIUI.
What to do if the phone starts to “glue”:
- 🔄 Once a month, perform a soft reset (in settings: About the phone). → Resetting settings).
- 🗑️ Clear the application cache (via Settings) → Annexes).
- 🛡️ Install an antivirus (such as Mi Security) and check your system for malware.
If the phone has already "survived" a drop or moisture, it is worth preparing in advance for possible problems:
- 📱 Make a backup of the data through Settings → Additionally. → Backup.
- 🔋 Buy a spare battery (original art. MB-J11).
- 🛠️ Find a trusted service center in case of breakdown.
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Even if your phone is working properly, check the battery every six months through the AccuBattery app (available on Google Play). If your capacity has dropped below 70%, consider replacing it.