Why the Redmi smartphone does not turn on and does not charge - a complete analysis of the reasons and solutions

Have you connected Redmi Note 10 Pro, Redmi 9A or another model to charging, but the indicator does not light up, the screen remains black, and the phone shows no signs of life? This problem is familiar to many smartphone owners Xiaomi —from budget Redmi to flagship POCO. In 80% of cases, the malfunction is related to battery, charging port or firmware, but there are also less obvious reasons that users are not even aware of.

In this article we will analyze all possible scenarios - from a banal discharge to critical failures of the power controllerwhich lead to Redmi stops turning on and charging. You will learn how to diagnose the problem yourself (even without special tools), what manipulations can bring the phone back to life, and in what cases the only thing left to do is take the device to a service center. We will pay special attention to the models Redmi 5/6/7/8/9/10/11 series and POCO X3/M3, since their hardware architecture has common vulnerabilities.

We warn you right away: if the phone has been dropped into water, has been subjected to severe mechanical stress, or has overheated, the chances of successful repairs at home are rapidly decreasing. In such cases, it is better not to take risks and turn to professionals. For everyone else, let's begin the analysis.

1. Battery discharge to zero: how to distinguish from breakdown

The most common reason why Redmi does not turn on and does not charge is deep battery discharge. Modern lithium-polymer batteries are automatically switched off by the controller when the voltage drops below 2.8–3.0 V to avoid damage. In this case, the phone may not respond to charging for 10–30 minutesuntil the voltage rises to a safe level.

How check:

• 🔌 Connect the original charging unit (at least 18 W) and cable USB Type-C (for new models) or Micro-USB (for old ones).
• ⏳ Leave the phone on charge at least 1 hour —even if the indicator is not lit.
• 🔦 Try turning on the flashlight (on some models it works even with a low battery): press power button + volume up on 10 seconds.
• 🔄 If after an hour there is no reaction, try another charger or cable.

If after these manipulations the phone still turned on, the problem was precisely in the discharge. To avoid repetition:

• 📴 Do not discharge below 10–15%.
• 🔋 Use only certified chargers (especially for models with support Quick Charge or Fast Charge).
• 🔄 Once every 2-3 months, perform battery calibration: completely discharge the phone, then charge until 100% without interruptions.

⚠️ Attention: If after a deep discharge the phone turns on, but quickly discharges or turns off when 20–30% charged, this is a sign battery degradation. In this case, the battery needs to be replaced.

2. Problems with the charging port: diagnostics and cleaning

The charging port is one of the most vulnerable places in Redmi. Dust, dirt, oxidation of contacts or mechanical damage can cause the phone to stop charging and not turn on. This is especially true for models with a port Micro-USB (Redmi 5/6/7, where the contacts are less protected than in Type-C.

How to check the port:

• 🔍 Inspect the connector for the presence foreign objects (dust, lint, debris). Light it with a flashlight - often accumulations of dirt are visible inside.
• 🧲 Gently clean the port toothpick (wooden!) or with a soft brush. Do not use metal objects!
• 💧 If there are signs of oxidation (green plaque), wipe the contacts alcohol swab (at least 70% alcohol).
• 🔌 Check whether the connector is loose when connecting the cable - this is a sign loose solder joint (requires repair).

If the port is visually clean, but charging is not happening:

• 🔄 Try a different cable and power supply (preferably original or from a trusted manufacturer).
• 📱 Connect the phone to the computer - if it is detected as a device, the problem is in the power supply, not in the port.
• 🔋 Check whether the port gets hot when the charger is connected. If yes, this is a sign short circuit (repair required).

Symptom	Probable cause	Solution
The phone is not charging, but the computer sees it	The problem is in the power supply or cable	Replace the charger
Charging only occurs in a certain position of the cable	Loose or dirty port	Clean the port or replace the connector
The port is heating up, there is a burning smell	Short circuit or damage to the controller	Immediately turn off charging, contact service
The phone charges very slowly (or only from the computer)	The contacts are damaged D+/D- (responsible for data transfer)	Replacing the port or soldering the contacts

⚠️ Attention: If If you notice that the port Redmi began to “fall out” of the case or the cable is only held at a certain angle, do not delay repairs. Further use may lead to damage to the motherboardwhich is many times more expensive to repair.

3. Battery malfunction: when replacement is required

Average battery life in Redmi — 2-3 years (or 500-800 charging cycles). After this, the capacity drops, the battery swells, and the power controller may block charging due to unstable voltage. If your phone is older than this age, there is a high probability that the problem is in the battery.

Signs of a faulty battery:

• 📉 The phone is discharged in a few hours even in mode waiting.
• 🔋 Charging is jerky (it starts and then stops).
• 💥 The phone body is swollen (especially noticeable on the back cover).
• 🔌 The phone turns on only when the charger is connected.
• 📱 A warning appears on the screen "The battery is damaged" (on some models).

How to check the battery without disassembling:

1. Connect the phone to the charger and watch the indicator. If it blinks or lights up unstably, this is a sign of unstable voltage.
2. Try to turn on the phone in safe mode (press power button + volume down when turning it on). If it works more stable in safe mode, the problem may be in the software, not in the battery.
3. Use the application AccuBattery (if the phone even sometimes turns on) to check battery health. The value below 80% is critical.

If you decide to replace the battery yourself:

• 🛠️ Buy original battery (for example, for Redmi Note 9 Pro this BN48 or BN49). Avoid cheap analogues - they can damage the power controller.
• 🔧 Use plastic spatula to carefully remove the back cover (it is usually glued to Redmi it is usually glued).
• ⚡️ Disconnect the battery cable firstto avoid short short circuit.
• 🔄 After replacement, perform calibration: completely discharge and charge the phone 2-3 times.

What will happen if you use a non-original battery?

Cheap analogues often have low capacity (for example, instead of 5020 mAh — 4000 mAh) and unstable voltage. This leads to:

- Rapid discharge even with minimal load.

- Overheating of the phone while charging.

- Damage to the power controller (up to complete failure of the motherboard).

- Battery swelling and risk of fire.

If you still decide to save money, choose batteries marked OEM (original equipment manufacturer) or from trusted manufacturers, such as Anker or Baseus (but only if they are certified for your model Redmi).

4. Firmware failures and software errors

If the phone does not turn on, but when connected to charging the indicator vibrates or the indicator lights up, the problem may be in damaged firmware. This often happens after:

• ⚡ Unsuccessful update MIUI (especially through OTA).
• 🔄 Incorrect root access or installation of custom recovery (TWRP).
• 📱 Installing incompatible applications or modified APKfiles.
• 💻 Connecting to a computer with installation utilities (for example, Mi Flash Tool).

How to restore the firmware:

Method 1: Hard Reset

If the phone somehow reacts to charging (vibrates, the screen lights up), try resetting the settings:

1. Turn off the phone (if it is in the “eternal boot” state, hold down power button for 15–20 seconds).
2. Press power button + volume up until the logo appears Mi.
3. V menu Recovery select Wipe Data → Wipe All Data (control - volume buttons, confirmation - power button).
4. After the reset, reboot the phone (Reboot).

Method 2: Flashing via Fastboot

If the reset did not help, you will need to reflash the phone via Fastboot:

1. Download the official firmware for your model from the website Xiaomi (file with the extension .tgz or .zip).
2. Unpack the archive and install Mi Flash Tool on computer.
3. Turn off the phone and press power button + volume downto enter Fastboot.
4. Connect the phone to the computer and run Mi Flash ToolSelect the downloaded firmware and press Flash.
5. Wait for the process to complete (usually 5-10 minutes).

⚠️ Attention: Flashing via Fastboot deletes all data from the phone, including photos, contacts and applications. If there were important files on the phone, try extracting them via TWRP (if installed) or contact a service center for data recovery.

If the phone is not detected by the computer in Fastboot:

• 🔌 Try another USB cable (preferably original).
• 💻 Install drivers Qualcomm or MediaTek (depending on the processor of your model).
• 🔄 Restart your computer and phone, then try again.

5. Damage to the power controller or motherboard

If all the previous methods did not help, the problem may lie in hardware failure:

• 🔥 Burnt controller power supply (often due to power surges or the use of non-original chargers).
• 💧 Short circuit after moisture.
• 🔧 Dump of chips (for example, PMIC — Power Management IC).
• ⚡ Damage to power circuits on the motherboard.

Signs of hardware failure:

• 📱 The phone does not respond absolutely (no vibration, the indicator is not lit, the computer does not detect the device).
• 🔥 Burning smell or visible traces of burning on the board.
• 💧 Traces of corrosion (green or white coating) under the battery or near the connectors.
• 🔌 The phone heats up even without connecting to charging.

What you can do yourself:

• 🔍 Carefully disassemble the phone and inspect the motherboard for darkness, swollen capacitors or broken elements.
• 🧲 If you see corrosion, wipe board alcohol solution (at least 90%) and let dry for 24 hours.
• 🔧 Check if the cables have fallen off (for example, the battery or display cable).

If you do not have experience in soldering BGAmicrocircuits or working with a multimeter, it is better to contact the service. Repairing a power controller or resoldering microcircuits requires special equipment (soldering station, hot air gun, microscope) and skills. The average cost of such repairs for Redmi — 3000–8000 ₽ (depending on the model and complexity of the breakdown).

⚠️ Attention: If the phone is was in water, do not try to turn it on or charge it! Immediately remove the battery (if possible) and dry the board for rice or silica gel at least 48 hours. Turning on a wet phone is almost guaranteed to lead to a short circuit and damage to the motherboard.

6. Problems with the power button or cables

Rare, but there are cases when Redmi does not turn on due to mechanical failure of the power button or a break in the cable connecting it to the motherboard. This can happen after a fall, shock, or prolonged use (the button simply wears out).

How to check the power button:

• 🔍 Inspect the button for play or cracks.
• 🔧 Gently press the button from different sides - if it “falls” or does not return to its original position, the mechanism is broken.
• 📱 Try turning on the phone without the power button:

  1. Connect the charger.
  2. Press and hold  +  for 10-15 seconds.
  3. If the phone vibrates or the screen lights up, the problem is definitely in the power button.

If the button does not work, you can:

• 🔧 Replace (the cost of a new button is 200–500 ₽, but the phone must be disassembled).
• 💻 Temporarily bypass using ADB-commands (if the phone somehow reacts to charging):

  adb shell input keyevent 26 # imitation of pressing the power button

  (required enabled debugging USB, which is unlikely in this situation, but sometimes helps after partial firmware recovery).

Also check power button cable —it may move away from the board or break. To do this:

1. Disassemble the phone (instructions for your model can be easily found at YouTube).
2. Find the cable going from the power button to the motherboard.
3. Check whether it has come loose from the connector. If so, carefully connect it back.

7. When to contact the service: prices and guarantees

If you have tried all the methods, but Redmi still does not turn on and does not charge, it is time to contact specialists. Here are the estimated prices for repairs in service centers (for 2026):

Type of repair	Cost (₽)	Terms	Warranty
Battery replacement	1200–2500	1–2 hours	3–6 months
Cleaning/replacing the charging port	800–1800	1 day	3 months
Repair of the power controller	3000–8000	2–5 days	6 months
Resoldering of microcircuits (PMIC, capacitance)	4000–12000	3–7 days	6–12 months
Restoration after moisture ingress	2500–15000	3–10 days	3 months (depending on the extent of damage)

Where is the best place to repair:

• 🏢 The official Xiaomi service center —more expensive, but with a guarantee and original spare parts. Suitable if the phone is under warranty (even if it does not cover this case, sometimes they will accommodate you halfway).
• 🔧 Local services is cheaper, but the quality depends on the craftsmen. Look for reviews and ask what spare parts are used (original or analogue).
• 📦 Independent replacement —only if you are confident in your skills. For Redmi it is easy to find spare parts on AliExpress or in local stores, but the risk of damaging the board is high.

⚠️ Attention: If your Redmi was purchased in China (for example, AliExpress or Gearbest), the official guarantee Xiaomi Russia does not apply to it. In this case, repairs at an unofficial service may be cheaper than sending the phone back to China.

1. Take a photo of the IMEI (on the box or under the battery) - this will help avoid replacing components.

2. Check to see if they provide a warranty for repairs (must be at least 3 months).

3. Ask whether original spare parts or analogues will be used (the difference in price can be significant).

4. If the phone was in water, honestly report this - this will affect the repair method and its cost.-->

FAQ: Frequently asked questions about Redmi malfunctions

❓ The phone does not turn on, but vibrates when charging is connected. What to do?

This is a sign that the phone is receiving power, but cannot boot due to:

• 🔋 Low battery (wait 30-60 minutes on charging).
• 📱 Damaged firmware (try logging in c Recovery or Fastboot).
• 🔧 Faulty power button (try turning it on using the volume button combination).

If there is vibration, but the indicator does not light up, most likely the problem is display or backlight cable.

❓ Is it possible to charge Redmi without an original charger?

Yes, but with reservations:

• ✅ You can use chargers from other manufacturers if they support Quick Charge 3.0/4.0 or Power Delivery (for models with Type-C).
• ❌ You cannot use cheap "no-name" chargers - they can damage the power controller.
• ⚡ For older models (Redmi 4/5) any charger on 5V/2A, but charging will be slower.

If the phone does not charge from a non-original charger, but is charged from the computer, the problem is in the power supply.

❓ After the fall, the phone stopped turning on?

The most common injuries that occur when falling are:

• 🔋 Battery (the cable may come off or the controller may be damaged).
• 📱 Display or cable display (the phone may work, but the screen is black).
• 🔌 Charging port (especially if the impact was on the bottom of the phone).
• 🔧 Power button (if the impact was on the side edge).
• 💥 Motherboard (the worst option - cracks on the board or chips falling off).

The first thing to do is disassemble the phone and inspect the board for cracks or chips elements. If everything is visually intact, try connecting another charger.

❓ The phone turns on only when the charger is connected. What's wrong?

This is a typical symptom of a faulty battery or controller power supply:

• 🔋 The battery does not hold a charge (swollen, lost capacity).
• 🔌 The power controller cannot supply voltage from the battery stably.
• 📱 The firmware is damaged (the phone does not “see” the battery).

Solution:

1. Try resetting via Recovery.
2. If it doesn't help, replace the battery.
3. If the replacement doesn't help, take it to service (the problem is in the power controller).

❓ Is it possible to restore data if the phone does not turn on?

Yes, but it depends on the cause of the breakdown:

• 🔧 If the problem is battery or port, the data can be retrieved by connecting the phone to the computer via USB-OTG or a special box for recovery.