Xiaomi is not included 9C: What to do if the smartphone does not respond to the charging and power button

Your Xiaomi Mi. 9C suddenly stopped turning on, does not respond to charging and does not show signs of life? This problem is familiar to many owners of budget smartphones Xiaomi, especially after the first time. 2-3 The reasons can range from a simple battery discharge to a serious hardware malfunction of the motherboard. In this article, we will examine all possible scenarios why Mi Mi is a problem. 9C It does not turn on, and we will offer step-by-step solutions - from elementary checks to complex firmware manipulations.

It's important to understand that if your smartphone doesn't show any signs of life (it doesn't vibrate, the charging light doesn't turn on, the screen stays black), it's not a verdict. In 60 percent of cases, the problem is solved without going to the service center. However, some malfunctions, such as a short circuit on the board or a power chip dump, require professional intervention, and we can help you diagnose the problem and choose the optimal recovery path.

Before you start repairing, answer the key question: what are the symptoms?

• 🔋 Do not react to the power button and charging (black screen, no vibration).
• 🔌 Show the charging indicator, but do not turn on.
• 🔄 Hang on the Mi logo or load in an infinite loop.
• 📵 Turn on, but immediately turn off through 1-2 seconds.

The algorithm of action depends on that. Next, we'll look at each case separately.

1. Check for obvious reasons: charging, battery, power button

Start with basic checks - they take 5 minutes but rule out 40% of possible problems. 9C It's not on because:

• 🔌 Faulty cable or adapter (especially if you use non-original accessories).
• 🔋 Deep battery discharge (if the smartphone was discharged for more than a month).
• 🔘 Sticking or breaking the power button (mechanical wear).
• 💧 Moisture intrusion (even if there are no external traces of corrosion).

Here is the sequence of actions for the primary diagnosis:

Try another cable and charger (original on the phone) 10W/18W)

Connect your smartphone to your PC through USB — Check if it is defined as a device.

Press and hold the power button. 20-30 Seconds (sometimes helps with hanging out)

Light a flashlight on the screen – if the image is barely visible, the problem is in the backlight

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If after these manipulations the smartphone began to charge (the indicator lit), but does not turn on – wait. 15-20 If you're in deep discharge, the battery controller can block the power until you reach a minimum charge level.

⚠️ Warning: Never use “fast” charges from other devices (such as an iPad or laptop) for a discharged Mi. 9C. Too high current can damage the power controller if the battery is completely dead.

2. Forced reboot and reset via Recovery

If the smartphone responds to charging (the indicator is on), but does not turn on, a software error may have occurred, in which case a forced reboot or reset via Recovery Mode will help.

For Xiaomi Mi. 9C button combination to enter Recovery:

1. Turn off your smartphone (if it freezes, hold the power button) 10-15 seconds).
2. Hold the Loud up. + Eating and holding on 8-10 seconds.
3. Release the buttons when the Mi logo and the recovery menu appear.

From the Recovery menu, select:

• 🔄 Reboot → Reboot to System – Simple Reboot.
• 🧹 Wipe Data → Wipe All Data – Complete reset (deletes all data!).
• 📦 Connect with MiAssistant – if you need to reflash through the PC.

If the phone boots after the reset, but the data is lost, restore it from the Mi Cloud backup or through Google Account. If the problem persists, move to the next step.

Diagnosis of the battery: how to check without disassembly

Battery is one of the most vulnerable places Xiaomi Mi 9C. Through 2-3 The battery capacity falls on the year of operation 30-40%, The power controller may start blocking charging, and here are indirect signs of battery problems:

• 🔋 The smartphone is turned on only from charging, but immediately turns off when the cable is disconnected.
• 🔌 The charging indicator flashes or burns unstablely.
• 📉 The battery is discharged for 1-2 hourly with minimum load.
• 🔥 The body heats up in the battery area (especially when charging).

Check the status of the battery without disassembly can be done using the hidden menu of engineering tests:

1. Enter the dialer code: ##4636##.
2. Select Battery Information (Battery Information).
3. Check the parameters: Level - current charge in %. Voltage - voltage (normal: 3.7–4.2V). Temperature - Temperature (normal: 25-40)°C).

If the voltage is lower 3.4V or Unknown status, the battery is likely to have failed:

• 🔧 Try to “wake up” the battery with an external power source (e.g., a universal charger). LC-40).
• 🔋 If it doesn’t work, replace the battery (the original cost). ~1500–2,000 rubles.).

Charging with another cable.

I was resetting through Recovery.

I tried to turn it on with a charger.

I was disassembling and checking the battery.

I've tried nothing.

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4.Motherboard problems: short circuit, chip dump

If all previous methods have failed, the problem may lie in the hardware: short circuit, chip failure, or circuit damage.

• 🔌 The smartphone does not respond to anything (no indication, vibration, heating).
• 🔥 The body heats up even without charging.
• 💥 There were physical injuries (falls, bumps, moisture intrusion).
• 🔧 Previously, unqualified repairs (screen replacement, battery replacement) were carried out).

The most common faults with the Mi 9C:

To diagnose the fee, you will need:

1. Disassemble the smartphone (instructions for Mi) 9C — below).
2. Call the power supply chain with a multimeter (short circuit check).
3. Examine the board under a microscope for detached elements.

⚠️ Warning: If you have no experience with soldering equipment, do not attempt to repair the board yourself (PMIC) It can completely disable your smartphone, and in that case, the best way to do that is to go to a service with micro soldering equipment. BGA.

5. Fastboot flashing: when it will help

If the smartphone responds to a PC connection (defined as Qualcomm) HS-USB QDLoader 9008 or Fastboot, but not included — the problem may be in the corrupted firmware:

• 📱 You tried to update the software through Ota Updater and the process was interrupted.
• 🔄 The smartphone is getting stuck on the Mi logo or in an endless reboot cycle (bootloop).
• 💻 This package is for this error "laurel_sprout" devices; this is a' when trying to update.

You'll need to flash it back:

• 💻 Windows computer 7/10.
• 🔌 Original. USB-cable (better from the set).
• 📥 Fastboot firmware ROM Xiaomi Mi 9C (codename: laurel_sprout).
• 🛠 Mi Flash Tool (download from the official Xiaomi website).

Step-by-step:

1. Download the official firmware for laurel_sprout (Choose the version of Fastboot).
2. Unpack the archive in a folder without Cyrillic characters (for example, C:\Mi9C_Fastboot).
3. Install Qualcomm drivers (if your PC doesn’t recognize your device in Fastboot).
4. Connect the off smartphone to the PC, holding Volume Down + Power (to log in to Fastboot).
5. Launch the Mi Flash Tool, select the firmware folder and click Refresh → Flash.

1. Reconnect. USB-port USB 2.0 (not 3.0!).

2. disable the antivirus and firewall.

3. Use another version of Mi Flash (e.g. 2018.5.28.0).

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The firmware process will take 5-10 minutes. Once completed, the smartphone should automatically restart. If this does not happen, try turning it on manually (hold the power button for 10-15 seconds).

6. When to contact the service: prices and risks

If all of these methods didn't work, it's probably a hardware problem that requires professional intervention, and here are situations where amateurism is dangerous:

• 🔥 Smartphone heats up even without charging (risk of battery fire).
• 💧 It was a bit of water (even if it was a few days).
• 🔧 You've tried to disassemble the device and damaged the plumes.
• 📉 Diagnosis showed a short circuit on the board.

Average prices for repairs Xiaomi Mi 9C in service centers (2026):

When choosing a service, pay attention to:

• 🔧 Availability of micro-soldier equipment BGA (fee-repair).
• 📋 Work guarantee (minimum 3 months).
• 💬 Reviews about a particular master (on Yandex.Maps or 2GIS).

⚠️ If you are offered to “sweeten a smartphone for 500 rubles” without diagnosis – this is a scam. 9C With a Snapdragon 665 processor, you can't flash the device without a hardware lock without a working Fastboot mode.

7.Alternative methods: start without battery and test mode

If you're sure that the battery is a problem, but there's no new one at hand, you can try temporarily running your smartphone without the battery.

1. Take Mi apart. 9C (See the instructions in the spoiler above).
2. Disconnect the battery plume.
3. Connect your smartphone to a 3.8 power source–4.2V (for example, a laboratory power supply unit through battery contacts (+ and –).
4. Press the power button.

Important: This method only works if the power controller is in good working order. If the board is damaged, the power supply can exacerbate the problem.

Another way to diagnose – test mode EDL (Emergency Download Mode, which allows you to flash your smartphone even if the Fastboot is not available. EDL:

1. Turn off your smartphone.
2. Close the contacts Test Point on the board (for Mi) 9C These are two contacts next to the charging connector).
3. Connect. USB-plug-in.
4. The device manager should appear Qualcomm HS-USB QDLoader 9008.

You can then flash the device through the Mi Flash Tool in mode. EDL. Careful: Wrong actions in this mode can permanently block the bootloader (hard brick).

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If the smartphone is determined in EDL-The problem is in damaged memory partitions (eMMC), which requires replacement of the memory chip, which is not economically feasible (cost of repair). ~80% of the price of a new smartphone).

FAQ: Frequent questions about Xiaomi Mi malfunctions 9C