Your Xiaomi Redmi 8 is no longer on, doesn't show signs of life when you connect to charging, and the screen is black? This problem is familiar to many owners of budget smartphones, especially after 2-3 years of active use. The reasons can range from a trivial battery discharge to serious hardware malfunctions. But don't panic: in 60% of cases, the device manages to "reanimate" yourself without resorting to expensive repairs.
In this article, we will look at all possible scenarios for why the Redmi 8 doesn’t turn on or charge, from software failures to physical damage. You will learn how to diagnose a problem by indirect signs (for example, vibration when connecting a charge or flashing an indicator), which manipulations should be tried first, and when it is better to immediately carry the phone to the service center.
If you're prepared to follow instructions, be patient: some methods take time (e.g., "warming up" the battery or waiting to charge when it's off). For convenience, we've identified 3 difficulty levels, from basic to advanced. Start with the first section and move on to the next one if the problem persists.
1. Checking for obvious reasons: charging, cable and socket
Before you commit to hardware malfunctions, make sure that the problem is not the trivial stuff. According to service centers, 30% of complaints that "do not turn on" are solved by replacing the cable or power supply.
- 🔌 Use the original charger.Redmi 8 It's sensitive to the quality of the power supply. If you plug in a cheap, non-neume adapter, the phone may not recognize charging because of a voltage mismatch (the original gives you a charge). 5V/2A).
- 🔄 Try another cable. Often the inner veins at the base of the USB-Type C connector are damaged.
- 🔋 Connect to another power source. Test the charging from the computer (USB 3.0), power bank or other outlet, sometimes the problem is a network filter or faulty wiring.
- 📱 Check the phone's connector. Take a flashlight and inspect the Type-C port for debris, oxidation, or bent contacts. If you get too dirty, clean it gently with a toothpick (not a metal object!).
If you don't respond to this manipulation, you can move on to the next step, but first, you can do a hidden charge test.
- Connect the Redmi 8 to charging and leave for 15-20 minutes.
- Without turning off the cable, press the power button for 10-15 seconds.
- If the phone vibrates or the Mi logo appears, it means the battery was still charging, but the discharge was critical.
⚠️ Warning: Never use a higher voltage adapter to charge the Redmi 8 5V (This can cause the power controller to fail!
2.Right reset and forced launch
If the phone doesn't show signs of life, but you're sure the battery isn't fully discharged (like yesterday it was still running), try a forced reboot, which helps with system freezes or software failures.
For Xiaomi Redmi 8, the procedure looks like this:
- Press the power button and the volume button at the same time.
- Hold them for at least 20 seconds (even if nothing seems to be happening).
- If the phone vibrates or the Mi logo appears on the screen, release the buttons.
If the device turns on and shuts off, it's probably a problem with the battery's deep discharge. Connect it to charge and try again in 30 minutes. If there's no reaction at all, move on to the next section.
Important: Some Redmi 8 firmwares may have different button combinations. If Power + Vol Up didn't work, try:
- 🔘 Power + Vol Down (10-15 seconds)
- 🔘 Power + Vol Up + Vol Down (Simultaneously, 15 seconds)
Turned off the phone from charging |
I made sure the buttons weren't stuck |
I tried all 3 keyboard combinations |
Waited at least 20 seconds for the hold.-->
Diagnosis by indirect signs: what do vibrations, indicator and sounds mean
Even if the Redmi 8 screen is not turning on, other signals can tell you what the problem is.
| Sign. | Possible cause | Recommendations |
|---|---|---|
| The phone vibrates when charging, but does not turn on | Deep battery discharge or loader failure | Leave on charging 1-2 hours, then try a hard reboot. |
| Red lights on, but the phone doesn’t respond to the power button | Battery is charged, but the system does not start (possibly damaged boot partition) | Try logging into Fastboot (see Section 5) |
| The phone heats up when charging, but does not turn on | Short circuit in battery or power controller | Shut down immediately! Service diagnostics required |
| When holding the buttons, the sound of the USB connection (on PC) is heard | The phone is defined as a device, but the screen is not working. | The problem is the display plume or graphics chip |
If the phone does not show signs of life (no vibration, indicator, heating), this may indicate:
- 🔋 Battery discharge is lower 2.5V (controller blocks charging).
- 🔌 Power controller malfunction (often after using unoriginal charges).
- 💥 Damage to the motherboard (for example, after falling or getting moisture).
What to do if your phone falls into the water?
4. Charging a dead battery: recovery methods
If the Redmi 8 battery is dead and the power controller is blocking charging, a standard network connection won't help, and there are two ways to wake up the phone:
Method 1: Charging from another source
Use it. USB-Hub with external power or connect the phone to USB-Computer port (preferably) USB 3.0, it gives more current. Sometimes the low current from the PC allows the battery to wake up and start charging normally. Leave the phone plugged in for 2-3 hours, then try turning it on.
Method 2: “Warming up” the battery
If the phone was long dead (a few weeks), the battery could go into sleep mode to wake it up:
- Put the phone in a warm place (for example, next to the battery) for 10-15 minutes. Do not overheat! The temperature should not exceed 40 ° C.
- Connect to the original charger and leave for 1 hour.
- Try turning it on.
If these methods didn't work, maybe the battery failed, in which case only a replacement would help, and the cost of a new battery for the Redmi 8 is about 800-1,200 rubles (2026).
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If the phone is turned on after “warming up”, but quickly discharges, calibrate the battery: completely discharge it (before turning it off), then charge to 100% without interruptions. Repeat 2-3 times.
5. Entering Fastboot and Recovery Modes: When It Helps
If the phone vibrates or briefly turns on but doesn’t boot to the system, try logging into service modes to help determine if the problem is in the software or hardware.
How to log in to Fastboot
- Turn off the phone (if it is on, hold the power button for 10 seconds).
- Press Power + Vol Down and hold until the Fastboot logo appears.
How to log in to Recovery
- Turn off the phone.
- Press Power + Vol Up and hold until the Mi Recovery menu appears.
If you managed to log in to Fastboot or Recovery, the problem is likely software, and it will help:
- 🔄 Reset to factory settings (in Recovery, select Wipe Data). Attention! All data will be deleted.
- 📥 Flashing through Mi Flash (if the phone is identified in Fastboot).
If the phone is not included in service modes, this indicates a hardware malfunction (damage to the board, battery or button plume).
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If the phone is in Fastboot but not in Recovery, the recovery partition is likely to be damaged, and then only the PC firmware will help.
6. Hardware malfunctions: when without repairs can not do
If none of the previous methods worked, the problem lies in the hardware. Here are the most common hardware malfunctions of Redmi 8 and their signs:
| Malfunction | Signs. | Cost of repair (2026) |
|---|---|---|
| Bloated/worn battery | The phone does not hold a charge, turns off at 20-30%, the body is deformed. | 800-1500 rubles. |
| Faulty power controller | The phone does not charge at all, even after replacing the battery. | 1500-3,000 rubles. |
| Type-C connector damaged | Charging “twitches”, the phone charges only in a certain position of the cable. | 600-1200 rubles. |
| Oxidation/short circuit on board | The phone is heated, does not turn on after moisture hits | 2000-5000 rubles. |
The most common causes of hardware breakdowns Redmi 8:
- 🔥 Use of non-original charges (especially with higher voltage) 5V).
- 💦 Moisture ingestion (even if the phone hasn't sunk, condensation can cause oxidation).
- 🤳 Mechanical damage (falls, impacts).
- ⚡ Battery wear (life of Li-ion batteries – 2-3 years).
If you suspect a hardware malfunction but are unsure of the diagnosis, use the free diagnostics at the service center, and in most cases, the masters will identify the problem in 10-15 minutes.
⚠️ Warning: Don't try to disassemble the Redmi 8 yourself if you don't have experience! There are many small elements on the board that are easily damaged. For example, if you sloppyly remove the display plume, you can tear the contacts of the touch panel.
7.Flashing your phone through a PC: Last Chance Before Repair
If the phone is logged into the Fastboot but doesn’t boot into the system, try flashing it over the computer, which will help if the problem is in damaged memory (boot, system, etc.).
You'll need:
- 🖥️ Windows computer.
- 🔌 Original. USB-cable (preferably from the set).
- 📥 Mi Flash Tool and firmware for Redmi 8 (codename: olive).
Step-by-step:
- Download the official firmware for Redmi 8 (select the Fastboot version).
- Unpack the archive in a folder without Cyrillic characters (for example, C:\miui_olive).
- Install the Mi Flash Tool and Qualcomm drivers.
- Connect your phone in Fastboot mode to your PC.
- In Mi Flash, select the firmware folder and press Refresh. The device must be determined.
- Press Flash and wait for the process to end (5-10 minutes).
If the firmware is successful, the phone should turn on. If it's not, the hardware is the problem.