Xiaomi phone does not charge: full instructions for diagnosis and repair

You plugged Xiaomi into charging, but the light doesn't go up, the battery percentage doesn't go up, and the device suddenly shuts down and refuses to turn on? Charging problems are one of the most common smartphone malfunctions, and in 90% of cases they can be fixed without going to the service center. In this article, we'll look at all the possible reasons why Redmi, POCO or Mi don't charge, from simple cable damage to serious hardware breakdowns.

It is important to understand that if the phone is completely discharged and does not respond to the connection to the network, the algorithm of actions will differ from the situation when charging is very slow (for example, 1% in 30 minutes). We'll look at both scenarios, and we'll give you some clear guidelines on when to try to fix the device yourself, and when to take it straight to the workshop. FAQ-block with answers to frequent questions.

Let’s start with the simplest and most obvious reasons, gradually moving to the complex ones.

1. Checking of charger and cable

The first thing to do is to eliminate power supply problems, and even if you think charging is good, statistics show that 65 percent of the time, the cable or adapter is to blame, especially for Xiaomi owners who often use unoriginal accessories.

Here’s how to test the charger correctly:

• 🔌 Connect another cable (preferably original from Xiaomi or certified) USB-C/Micro-USB). If the charging started, the problem is in the cable.
• ⚡ Try another power adapter. Use a charger with similar power (for example, a Redmi Note 12 adapter will suit the power adapter). 33W).
• 💻 Connect the phone to USB-If you're charging (albeit slowly) the power supply is the problem.
• 🔍 Check the cable for physical damage: bending, bare wires, melted areas. Pay special attention to the places near the connectors.

If you have Xiaomi with Quick Charge (Turbo Charge) support, but the phone charges slowly, check if the adapter power meets the model requirements. For example, the POCO F5 supports 67W, and if you use 10W charging, the process will take many times longer.

⚠️ Warning: Never use cables with damaged insulation, which can short-circuit and cause the phone's power controller to fail. If the wires are bare, replace the cable immediately.

2. Diagnostics of the charging connector on the phone

If the cable and adapter are all right, the next weak spot is the charging connector on the phone itself, which eventually gets clogged with dust, bends or oxidizes, leading to poor contact, especially for models with Micro-USB (Redmi 4X, Mi A1), but USB-C is not immune to problems.

How to check the connector:

• 🔦 Light a flashlight into the connector – if dust, dirt or foreign objects are visible inside (for example, fibers from clothing), they must be carefully removed.
• 🧲 Use a wooden toothpick (not metal!) to clean the contacts. Move parallel to the board so you don't bend the connector.
• 💧 If the contacts are oxidized (green coating), wipe them with alcohol (at least 70%) with a cotton swab.
• 🔄 Try to shake the cable slightly in the connector while charging, and if the phone starts charging only in a certain position, the connector is shattered and needs to be replaced.

On some Xiaomi models (e.g. Redmi Note 10 Pro), the charging connector is combined with an NFC antenna. If after cleaning the phone stopped recognizing contactless cards, then you damaged the contacts - in this case, you will need professional repair.

3. Battery problems: wear and bloating

The average battery life of Xiaomi smartphones is 2-3 years (or 500-800 charge cycles). If your phone is older, chances are that the battery is worn out and does not hold charge. But even on new devices, the battery can fail due to overheating, deep discharge or mechanical damage.

Signs of battery problems:

• 🔋 The phone discharges quickly (for example, from 100% to 0% in 2-3 hours without loading).
• ⚡ Charging is jerky (percentage of battery jumps up and down).
• 🔥 The body of the phone swelled (especially noticeable if you put it on a flat surface and spin - it will swing).
• 🛑 The phone is turned off at 20-30% charge and does not turn on without connecting to the network.

How to check the status of the battery:

1. Go to Settings → Battery → Battery condition (on some models, the path may be different).
2. Notice the Capacity parameter, which is less than 80 percent of the original value, and you should change the battery.
3. Use apps like AccuBattery (available on Google Play) to get detailed wear statistics.

⚠️ Warning: If the battery is swelling, you can't try to charge the phone or disassemble it yourself - this can lead to a fire or explosion!

4. Reset settings and firmware update

If hardware problems are ruled out, the cause may be a software failure, especially after MIUI updates or custom firmware installations, and in some cases, resetting or flashing the phone helps.

How to reset the settings to factory:

1. Go to Settings → About the phone → Reset settings.
2. Select Reset All Settings (not to be confused with Reset Network Settings).
3. Confirm the action and wait for the reboot.

If the phone is not turned on, you can try resetting through Recovery Mode:

1. Turn off the phone.


2. Press the Power + Volume button up for 10 seconds.




3. In the Recovery menu, select Wipe Data (use volume buttons for navigation, power button for confirmation).




4. After reset, select Reboot.

If the reset didn’t help, check the relevance of the firmware:

• 📱 Go to Settings. → The phone. → Updating the system.
• 🔄 Click on “Check Updates” and install the latest version. MIUI.
• 🖥️ If the phone doesn’t turn on, run it through the Mi Flash Tool (instructions are available on the official Xiaomi website).

Download the latest version MIUI for your model|Install Xiaomi drivers on PC|Unclose the firmware in a folder without Cyrillic symbols|Connect your phone to Fastboot (Power) + Loudness down)|Run the Mi Flash Tool on behalf of the administrator-->

5. Verification of the power controller and motherboard

If all the previous steps failed, the problem could be in the power controller or other components of the motherboard, which is one of the most complex malfunctions, and in most cases, it can not be fixed on its own without special equipment.

Signs of Controller Failure:

• 🔌 The phone does not respond to charging from any cable/adapter.
• 🔥 The case in the charging connector is very warm even without connecting to the network.
• ⚡ A message about damage appears on the screen. USB-device.
• 🛠️ After a fall or impact, the phone stopped charging.

What can be done:

• 🔧 Visual inspection of the board. If you're an electronics expert, you can remove the back cover and check the board for burnt-outs (blackened or bloated chips).
• 🔍 Multimeter check. Battery contacts must have a voltage of 3.7–4.2V. If it is not there, the problem is the food chain.
• 🏥 Repair of the power controller requires soldering and replacement of chips, which is impossible to do without experience.

⚠️ Attention: If you don't have experience in electronics repair, don't try to solder the board yourself.This can lead to a complete failure of the phone or even a fire.

💡

If the phone falls into water and then stops charging, don't turn it on right away. Disassemble (if you can), wash the board with isopropyl alcohol (99%) and dry it in rice or silica gel for 24-48 hours, in 60% of cases it helps to avoid corrosion.

6. Alternative charging methods (if the connector does not work)

If the charging connector is physically damaged, but the phone is still turning on, alternative charging methods can be used, which is a temporary solution, but it will help you not to be left without communication until you repair the device.

Charging methods without a connector:

• 🔋 Wireless charging. Suitable for models with support for Qi (for example, Xiaomi Mi 11, Redmi Note 12 Pro)+). Put your phone on the charging station.
• 🔌 Charging through OTG-- I'll put it on. USB-OTG The adapter to the phone connector, and it's a normal charging cable.
• 🔧 Direct battery connection. If you're an electronics expert, you can sell wires temporarily directly to the battery contacts (extremely dangerous!).
• 🔄 Power bank with solar panel, suitable for emergency cases when there is no access to the outlet.

For wireless charging, it is recommended to use certified devices (for example, Xiaomi Wireless Charging Pad or Baseus).The power will be lower than with wired charging, but this is enough to keep the phone in working order.

💡

Wireless charging works slower than wired charging, but it is safer for a worn-out battery, as it eliminates the risk of short circuit in the connector.

7. When to contact the service center?

Not all charging problems can be solved on your own, but there are a number of situations where you need to consult a specialist:

• 🔥 The phone is warmed to high temperatures (above 50)°C) when charging.
• ⚡ On the screen appears a message about battery damage.
• 🛠️ The charger is shattered or broken (seemingly with the naked eye).
• 💥 The battery swelled or deformed the body.
• 🔧 The phone does not turn on even after a long charge.

The cost of repairs in Xiaomi service centers (official and partner) varies depending on the problem:

Before you carry your phone to the service, back up your data (if it still turns on) and after repairing the board or replacing the battery, you may need to reset your settings.

FAQ: Frequent questions about Xiaomi charging