Xiaomi Redmi 8 not included: a complete guide to diagnosis and repair

Why Xiaomi Redmi 8 is no longer on and what to do about it

Your Redmi 8 suddenly stopped responding to the power button? The screen stays black, the indicator doesn't burn, and the connection to charge does not work? This problem is familiar to many owners of budget Xiaomi smartphones, especially after 2-3 years of use. The reasons can range from a trivial battery discharge to serious hardware breakdowns, but in 70% of cases the device can be brought back to life without going to a service center.

In this article, we’ll look at all the possible scenarios why Redmi 8 (codenamed olive) doesn’t turn on, from software crashes to physical board damage. You’ll get step-by-step instructions with photos, video examples, and warnings about typical bugs that can make things worse.

If your phone doesn't show any signs of life after a fall, moisture or a failed upgrade, don't panic. Start with simple steps and gradually move on to more complex manipulations. At the end of the article, you'll find an FAQ with answers to frequent questions and a symptom chart for quick diagnosis.

📊 What happened before Redmi 8 stopped turning on?

Fell/hit.

It's gone to zero.

Updated/requested

Wetness is coming in.

He shut himself down for no reason.

Other

1. Checking the underlying causes: charging and power button

Before disassembling your phone or dumping your firmware, rule out trivial issues. Start by inspecting the charger and cable. Redmi 8 supports fast 18W charging, but not all power supplies are compatible with this technology. Use the original adapter or certified counterpart (like from Baseus or Anker).

Connect your phone to charge and pay attention to:

🔋 Charging indicator: if the red/orange LED is on, the battery is discharged, wait 15-20 minutes before turning on.
🔌 Connection reaction: vibration or connection sound USB It is important to note the port’s performance.
📱 Body temperature: if the phone is heated - a short circuit on the board is possible.

If the indicator is not on, try alternative charging methods:

Connect to another source (computer, power bank, charging from another phone).
Use a USB-OTG adapter to connect to another smartphone (if reverse charging is supported).
Try wireless charging (if a modular back cover with Qi support has been installed before).

The power button is another vulnerability. If the phone doesn't respond to the press, check:

🛠️ Physical lock: It is possible that the button has fused or dirt has fallen under it.
💧 Oxidation of contacts (relevant after moisture is ingested).
🔧 Connecting the plume: when disassembling the phone, the button plume could move away from the board.

💡

If the charging indicator flashes red 3 times and goes out, this is a signal of a deep discharge of the battery. In this case, a 0.5-1A “push” current is required for 30-60 minutes for the battery controller to activate.

Forced reset and recovery modes

If the phone doesn't respond to the power button but you're sure the battery is charged, try hard reset. For the Redmi 8, the key combination is different from other Xiaomi models:

1. Press the Power + Volume button for 10-15 seconds.


2 Release the buttons when the Mi logo or vibration appears.




3. If the screen remains black, repeat the procedure 2-3 times.

If hard reset doesn’t help, go to Recovery Mode:

Press the power + Volume increase for 20-30 seconds.
Release the buttons when you see a menu with an Android robot.
Use volume buttons for navigation, power button for selection.

The Recovery menu has options:

🔄 Reboot – Reboot (try this first).
📲 Wipe Data – reset to factory settings (deletes all data!).
🔧 Connect with MiAssistant – Connect to a PC for firmware.

Try to reboot in normal mode|Check the battery charge (at least 30%)|Save important data (if the phone is switched on occasionally)|Prepare firmware for MiFlash (if you need flashing)-->

Attention! If the Recovery menu displays characters or incorrect characters, this is a sign of damage to the recovery partition, in which case you will need to flash through Fastboot.

3. Diagnostics of hardware malfunctions

If the software methods failed, the problem lies in the hardware. Consider the typical hardware breakdowns of Redmi 8 and their symptoms:

Symptoms.	Probable cause	Decision
The phone vibrates when charging, but does not turn on	Display or plume malfunction	Connect PC/TV via USB-C → HDMI or replace the screen
Charging indicator is on, but the phone does not respond to the buttons	Damage to the power button or its plume	Disassemble the phone and check the button contacts
The phone heats up when charging, but does not turn on	Short circuit on the board or failure of the power controller	Diagnostics in the service (sweeping station is required)
After the fall, the phone stopped turning on.	Disconnection of battery plume or damage BGA-chip	Checking the fastening of the plumes, if necessary - soldering

For self-diagnosis, you will need:

🔧 Plastic blade for disassembling the body.
🔍 Loop or microscope to inspect the board.
📱 Multimeter to check the voltage on the battery (should be) ~3.7–4.2V).

Attention! When disassembling the Redmi 8, be careful with the fingerprint scanner plume, which attaches to the middle frame and easily breaks. If you are not sure of your skills, you should contact the service.

How to check the battery without a multimeter?

If you don't have a multimeter, you can use the "replacement method": connect a known working battery from another Redmi 8 (or a compatible model, for example, the Redmi 8A). If the phone is turned on, the problem is in your battery. If not, look for the reason in the board or plumes.

4. flashing through Fastboot (if the phone is determined by PC)

If Redmi 8 doesn't turn on, but your computer recognizes it in Fastboot mode (when you connect to a USB, you can try reflashing your phone, which helps in cases like:

📱 Firmware failure after update.
🔄 Damage to the loader (bootloop).
🛠️ Incorrect installation of custom ROM.

You'll need firmware.

🖥️ PCs with Qualcomm drivers installed and ADB/Fastboot.
📂 Official firmware for Redmi 8 (download from Xiaomi website).
🛠️ MiFlash or Fastboot Tools.

Step-by-step:

Unpack the firmware in a folder without Cyrillic characters (for example, C:\redmi8_firmware).
Launch MiFlash, press Select and point the path to the firmware folder.
Connect the phone to the PC, holding Power + Volume Down.
In MiFlash, select Clean All mode and press Flash.
Wait for the end (5-10 minutes). The phone will reboot automatically.

Attention! Fastboot removes all data from internal memory, including photos and apps, and if the phone has been synced to Mi Account, contacts and some settings will be restored after you log in.

5. Test point method (EDL Mode) for dead phones

If Redmi 8 is not detected by the PC and does not respond to buttons, the last chance to bring it back to life is Emergency Download Mode (EDL), a method that requires disassembling the phone and closing special contacts on the board, but it is effective even with a damaged bootloader.

You'll need:

🔧 Mediator or tweezer to close contacts.
🖥️ PC with Qualcomm QDLoader installed and firmware in.mbn format.
🔌 pin or thin wire for point-circuit.

Instructions:

Turn off the phone from charging and disassemble it by removing the back cover.
Find test points on the motherboard (usually signed as EDL or TEST, located next to the battery connector).
Connect. USB-cable to PC, but not to phone.
Close the test points with tweezers and, holding them, connect the cable to the phone.
Device Manager should appear Qualcomm HS-USB QDLoader 9008.
Run the firmware through MiFlash in EDL mode.

Test points on Redmi 8 They are often located under a metal screen next to the camera. If you are not sure of their location, look for photos of the board for your revision (for example, for example, the camera is not sure of their location, olive_eea or olive_in).

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EDL is the only way to repair a phone with a damaged bootloader or a brick after a failed firmware, but improperly closing the contacts can put the board out of order, and if you don't have soldering experience, you'd better leave it to the professionals.

6.When to contact the service: signs of serious breakdowns

Not all faults can be fixed by yourself. Contact the service center if:

🔥 Phone gets very hot when connected to charging (fire risk!).
💦 There was a ingress of fluid, and more than 48 hours passed (oxidation of contacts).
🛠️ On the board, darkening, swollen capacitors or chips are visible.
📵 The phone is not detected in any mode (the indicator does not burn, there is no vibration).

The cost of repairing Redmi 8 in the services:

Type of repair	Cost (₽)	Timeline
Battery replacement	1 200–1 800	1-2 hours
Replacement of the display (with touchscreen)	3 500–5 000	1-3 days
Board repair (chip soldering)	2 000–10 000	3-7 days
Recovery after moisture is ingested	1 500–8 000	2-5 days

Xiaomi’s official service centers may refuse warranty repairs if:

The phone has autopsy marks (stopped seals).
Custom firmware is installed (for example, LineageOS or Pixel Experience).
Damage is caused by mechanical impact (cracks on the body).

7 Prevention: How to avoid problems in the future

To make Redmi 8 last longer without failure, follow the recommendations:

🔋 Don't discharge your phone to zero. Optimal charge level is 20 to 80%.
🔌 Use the original chargers. Cheap adapters can damage the power controller.
📱 Update your firmware regularly, but avoid bet versions MIUI.
💦 Avoid moisture. Even if the phone doesn't turn off right away, corrosion can show up in weeks.
🛡️ Install a cushion-depreciated case. Redmi 8 has a plastic case, but falls on a hard surface often disable plumes.

If you frequently experience freezes or spontaneous reboots, check out:

📊 Memory Occupation: Clear the cache in Settings → Warehouse.
🔍 Background apps: disable auto-run of unnecessary programs.
🛠️ Battery status: enter ##4636## and select Battery Information.

Frequent Questions (FAQ)

❓ The phone vibrates when charging, but the screen is black?

This is a sign of a malfunctioning display or plume. Try connecting your phone to your TV via a USB-C → HDMI adapter. If you have an image, you need to change the screen. If you don't, the motherboard or graphics chip is the problem.

❓ After updating MIUI Your phone went to bootloop?

Log in to Recovery Mode (Power + Volume buttons) and run Wipe Cache Partition. If it doesn't work, run your phone through Fastboot with the official firmware (instructions in Section 4).

❓ The phone fell into the water and did not turn on?

Turn it off immediately (if it still works) and remove it. SIM-map and tray, dry for at least 48 hours in a dry place (do not use a hair dryer or rice!). Do not try to turn on - this can cause short circuit.

❓ Can I recover the data if the phone is not turned on?

Yes, but it depends on the cause of the breakdown. If the phone is detected by a PC in Fastboot mode, you can extract the data through the ADB or TWRP. If the fee is damaged, you will need to contact the laboratory (cost of data recovery) ~5 000–15 000 ₽).

❓ How much does it cost to replace the battery on the Redmi 8?

The cost of the original battery (capacity 5000 mAh) – 800-1 200 ₽. Replacement in the service will cost 1,200-1,800 ₽. When buying, pay attention to the labeling: suitable models — BM4B or BM4C.