Xiaomi Redmi 8 is one of the most popular budget smartphones of the brand, but even it is not immune to sudden shutdowns and problems with power. If your device stopped responding to the power button, do not panic: in 80% of cases, the problem can be solved without going to the service center. In this article, we will analyze all possible causes β from banal battery discharge to serious hardware malfunctions β and give step-by-step instructions for diagnosis and recovery.
The Redmi 8 (codenamed olive) features a 5,000mAh removable battery, which makes some manipulations (e.g. forced reset) and others (the risk of plume damage from careless extraction) more difficult (we have taken into account all the nuances of the model and prepared a guide that will help even if the smartphone does not show signs of life: no vibration, no charge indicator, no response to the connection to the PC).
Important: if before disconnecting the device was subjected to mechanical stress (fall, moisture, severe overheating), immediately go to the section about hardware malfunctions - software methods are useless here.
1.Diagnostics: Why Redmi 8 doesn't turn on
The first step is to determine exactly what the problem is with.The Xiaomi Redmi 8 may not turn on for two main reasons:
- π Power problems: discharged battery, faulty cable/charger, contact oxidation.
- π± Software failures: system freeze after update, firmware damage, application conflict.
- π οΈ Hardware malfunctions: damage to the motherboard, chip failure, failure of the power buttons.
First, check the obvious:
- Connect the original charger (at least 10W) and leave it for 30 to 60 minutes. Even if the indicator does not burn, the battery could run out to zero.
- Try another charger and cable (preferably from Xiaomi or a proven brand).Non-original accessories often don't provide enough current.
- Connect your smartphone to your PC via USB β if the computer makes a connection sound, the problem may be in the display or plume.
If the indicator flashes red after charging, the battery is critically discharged, orange is charging, green is charging, but the phone is not turning on (possible firmware failure), and the absence of an indication can indicate a malfunction of the power controller or a circuit break.
2. Forced reboot: Hard Reset
If the Redmi 8 doesnβt respond to the power button but youβre sure the battery is charged, try a forced reboot, which will work even if the screen doesnβt turn on or the device is getting stuck on the MI logo.
Instructions for Xiaomi Redmi 8:
- Press and hold the Power + Volume button at the same time.
- Hold them for at least 15-20 seconds (even if nothing seems to be happening).
- Release the buttons when the Xiaomi logo or vibration appears.
βοΈ Checklist before Hard Reset
If after that the phone is turned on, but it is unstable (spontaneously restarts, brakes), we recommend resetting to factory settings through the Recovery menu.
- Turn off your smartphone (if itβs turned on after Hard Reset).
- Press Power + Volume Up until the Fastboot menu appears.
- With volume buttons, select Recovery Mode and confirm with the power button.
- From the Recovery menu, select Wipe Data β Wipe All Data.
β οΈ Warning: Reset will delete all data on the device, including photos, contacts and apps. If you have Mi Cloud enabled, some data can be restored after authorization.
Problems with the battery: what to do if there is no charging
Redmi 8 is known for battery problems after 2-3 years of use: the battery swells, loses capacity or refuses to charge. If the phone does not turn on and does not respond to charging, follow the following steps:
| Symptoms. | Possible cause | Decision |
|---|---|---|
| The indicator does not burn, there is no reaction to charging | Oxidation of battery contacts or connector | Clean contacts with alcohol, bend (when bloating - replace the battery) |
| Charging is underway, but the phone is not turning on. | Critical discharge (below 3.2V) | Use the "frog" for forced charging or replace the battery |
| The phone is turned on only from charging, without it turns off | Battery wear (capacity < 20%) | Battery replacement (original: BYD or Sunwoda) |
| Charging is interrupted, the phone is warming | Failure of the power controller | Diagnostics in the service (possible replacement of the BQ25896) chip |
If the battery is swelling (visible from the raised back cover or the characteristic "slamming" sound when pressed), do not try to charge it or turn on the phone - this is dangerous!
- Turn off the charger.
- Carefully remove the back cover (use a plastic shoulder blade).
- Disconnect the battery plume from the motherboard (it is usually white).
- Dispose of the battery at a special reception point.
π‘
If you can't immediately replace the battery, you can temporarily connect the Redmi 8 to charge without the battery (via a limited-current adapter), but this is risky - if the voltage surges, the board can burn.
4. Firmware recovery via Fastboot
If the phone vibrates when it connects to a charger, but doesn't turn on beyond the MI logo, the problem may be the damaged firmware, which often happens after a failed update or reset.
- π₯οΈ Computer with Mi Flash Tool drivers installed.
- π Original. USB-cable (better from the set).
- π Firmware for Redmi 8 (Olive version) from Xiaomi Firmware.
Step-by-step:
- Download and install the Mi Flash Tool.
- Unpack the firmware in a folder without Cyrillic characters (for example, C:\redmi8_firmware).
- Turn off the phone. Press Power + Volume down to enter the Fastboot.
- Connect your smartphone to your PC. Qualcomm HS-USB QDLoader 9008 should appear in the Device Manager.
- In the Mi Flash Tool, select the firmware folder, press Refresh, then Flash.
- Wait for the process to finish (5-10 minutes) and the phone will reboot automatically.
β οΈ Note: Fastboot erases all data, including the userdata partition. If you have a bootloader unlocked, you will have to re-unblock it after you have firmware.
If the Mi Flash Tool is 0x8007001f or 0xc000000d, try:
- π Reinstall the driver manually through Device Manager.
- π Use the other USB-port (preferably) USB 2.0 on the back of the PC).
- π₯ Download a different firmware version (e.g. Global Stable instead of the EEA).
5. Hardware malfunctions: when without service can not do
If none of the software methods worked, the problem is probably the hardware. Common hardware problems Redmi 8:
| Malfunction | Signs. | Cost of repair (2026) |
|---|---|---|
| Power chip dump (PMIC) | It doesnβt turn on, doesnβt charge, but the PC defines it as Qualcomm 9008. | 1 500β3 000 β½ |
| Damage to the display plume | The screen doesn't light up, but the phone vibrates and makes sounds. | 800β1 500 β½ |
| Power button malfunction | The phone is only turned on through charging or recovery. | 600β1 200 β½ |
| Short circuit on board | The phone warms up, discharges quickly, spontaneously turns off | 2 000β5 000 β½ |
Some malfunctions can be diagnosed independently:
- π Display check: illuminate the screen with a flashlight - if you see the image, the problem is in the backlight or plume.
- π Sound check: call your phone from another device β if the beep is going, but the screen is not turned on, the display module is to blame.
- π‘οΈ Overheating check: if the case is hot, it may have been locked by a battery or processor.
How to check the power button without disassembling?
If you decide to repair the Redmi 8 yourself, consider:
- π Parts are better to buy on AliExpress (search by code part, for example, Redmi 8 battery). BYD).
- π§ You'll need a set of screwdrivers to disassemble. T3, T5 and plastic blades.
- πΉ Follow video instructions (e.g. on YouTube), but be aware that the fees may differ from one revision to another.
6.Updog: what to do if Redmi 8 "sinks"
If the phone is disconnected after contact with water, you need to act quickly β you have 1-2 hours to minimize the damage.
- Turn off the device immediately (if it is still working) and remove the battery.
- Wipe the body with a dry wipe, removing visible water droplets.
- Put the phone in a silica gel container for 24 to 48 hours. Don't use rice, it's inefficient and can clog connectors!
- After drying, check the moisture indicator (white circle under the battery - if it is red, there was moisture).
What can't be done:
- β Dry with a hair dryer β hot air can melt plumes.
- β Turn on the phone to check until full drying.
- β Charge the device if the moisture indicator is red.
If the phone does not turn on after drying:
- π Try to connect to charging β if there is a reaction (vibration, indicator), the problem may be in oxidized contacts.
- π οΈ Take your phone apart and clean the board with 90% isopropyl alcohol (not vodka:
π‘
Even if the phone is turned on after moisture hits, delayed malfunctions (corrosion of contacts, failure of chips) may appear within 1-2 weeks.
7.How to prevent Redmi 8 from shutting down again
To avoid problems in the future, follow these guidelines:
- π Battery: Do not allow discharges below 10%. Every 3 months, perform calibration (full discharge). + charge to 100%).
- π² Firmware: update the system only through official software (Settings) β The phone. β Updating the system).
- π‘οΈ Temperature: Do not use your phone in temperatures below -10Β°C or higher +45Β°C.
- π‘οΈ Protection: Install a cushioned cover and protective glass (even if the screen is not broken, microcracks can cause the plume to detach).
Useful settings for stability:
- Turn off Auto-Update apps in Google Play (may cause conflicts).
- Enable Safe Mode (Settings β Memory β Cleanup) to remove garbage.
- Set background limit for applications (Settings β Battery β Power Saving Mode).
If your Redmi 8 is overheating frequently, check:
- π Processor load (in Settings) β The phone. β Status of the system).
- π Background processes (use Mi Security to clean up).
- π Charging cable β non-original can cause the controller to overheat.