Xiaomi does not turn on and shows a black screen: full instructions for diagnosis and repair

Why is Xiaomi not turned on and the screen is still black?

The black screen on Xiaomi devices is one of the most common problems faced by users of both smartphones (Redmi, POCO, Mi) and TVs (Mi TV, Redmi Smart TV). 80% of the time, the cause is not a matrix breakdown, but software failure, a dead battery or an incorrect switching sequence. But how to distinguish a “soft” glitch from a serious hardware malfunction?

In this article, we will analyze all possible scenarios when Xiaomi does not show signs of life: from banal discharge to damage to the motherboard. You will learn how to diagnose a problem at home, what manipulations should be tried before visiting the service center, and when self-repair can only aggravate the situation. 12/13/14, Redmi Note 11/12 and Mi TVs TV A2/Q2, Because their architecture has specific weaknesses».

Warning: If your device stops turning on after falling, getting moisture or trying to run through the Fastboot, the chances of recovery without professional equipment are minimal.

1. Checking the obvious: power and buttons

Start with basic checks -- they take less than 5 minutes, but they rule out 30 percent of the possible causes of black screens.

• 🔋 Battery discharged (even if you "just charged"). On Redmi Note 10 Pro models and newer ones, the power controller can block power on when the voltage is below 3.2V.
• 🔌 Faulty cable/power supply: Xiaomi’s original charging systems have an identification chip – cheap analogues may not provide the right current.
• 🖱️ The power button hangs. On the series smartphones. POCO F mechanical buttons often stick after falls.
• 📺 No signal to TV. Mi TVs TV may display a black screen if an unsupported source is selected (e.g, AV instead HDMI).

For smartphones:

1. Connect the original cable to charge with Quick Charge 3.0+ support (for 2020 and newer models).
2. Hold the power button for 20-30 seconds – sometimes it resets the “hang” controller.
3. Try turning the device on by holding the power button + volume up (Fastboot mode).

For Mi TV/Redmi TV:

1. Turn off the power for 1 minute, then turn it on again.
2. Click on the Menu + Up + OK remote at the same time – this is a reset of the screen settings on some models.
3. Check the power indicator: if it flashes red, the problem is in the power supply; if it burns green, the firmware failure.

2. Hardware reset: when and how to do

If the device doesn't respond to charging and buttons, the next step is a hard reset, which will delete all the data on the smartphone, but in 50% of cases it brings it back to life. Importantly, on Xiaomi TVs, the reset saves the firmware but resets the network and application settings.

For smartphones (including Redmi Note 9/10/11, POCO X3/X4):

1. Turn off the device (if it is in a “hang” state, hold the power button for 30 seconds).
2. Press Power + Volume Up for 10-15 seconds until the Fastboot logo appears.
3. In the recovery menu, select Wipe Data → Factory Reset (manage volume buttons, confirmation power).

For Mi TVs:

1. On the TV turned off, press on the Menu + Back remote at the same time.
2. Hold for 5-7 seconds until the reset menu appears.
3. Select Reset to Factory and confirm.

A warning for owners of Xiaomi 12T/13 Pro:

⚠️ Note: On these models, a Fastboot reset can block the bootloader if you previously enabled it. OEM Unlock in the developer settings. In this case, you will need official firmware through the Mi Flash Tool.

3. Diagnostics of hardware malfunctions

If the reset didn't work, the problem could be physical damage to the components, and here's how to check without disassembling the device:

For Xiaomi smartphones with a non-removable battery (such as the Mi 11 Ultra or Redmi K50), try this test:

1. Connect the charger and place the phone on a cold surface (such as a ceramic plate).
2. If after 10-15 minutes there is a charging indicator – the problem is overheating the battery.
3. If there is no reaction, the battery may have gone out of contact or the controller may have burned.

For Mi TV Q1E/Q2:

• 🔊 Listen, if there's a fan sound when you turn on, it's not there, it indicates that you're overheated.
• 💡 Check the screen backlight: illuminate the flashlight at an angle - if the image is barely visible, burned. LED-ribbon.
• 📶 Turn it off. HDMI-devices - sometimes TV «Hanging” due to conflict with an external source.

4. Firmware through Fastboot: The extreme method

If the device is detected by the computer in Fastboot mode (checked by the fastboot devices team in the terminal), but does not boot, flashing will help. This method is suitable for Xiaomi smartphones with an unlocked bootloader.

Step-by-step:

1. Download the official firmware for your model from the Xiaomi Firmware website (choose the Fastboot version).
2. Unpack the archive into a folder without Cyrillic characters (e.g., C:\MiFlash\firmware).
3. Install the Mi Flash Tool and connect your phone in Fastboot mode.
4. In the program, select the firmware folder, press Refresh, then Flash.

Important for POCO F3/F4 and Redmi K40/K50:

⚠️ Note: On these models, the firmware via Fastboot erases data in the persist section, which can lead to loss IMEI. Before the procedure, save it through the engineering menu (#4636##).

For Mi TVs, the procedure is more complicated:

• 🖥️ Required. USB-OTG cable and firmware in.pkg format.
• 🔧 You need to log into the service menu (on the remote: Menu). → 4, 6, 8, 2, 0).
• 📁 Select Upgrade via USB and specify the firmware file.

💡

If the Mi Flash Tool gives you an "anti-rollback" error, download the old firmware, run it through, and then upgrade to the new one. This bypasses rollback protection.

5. When to contact the service: prices and risks

If all of the above methods fail, there are two options:

1. Xiaomi’s official service guarantees data retention (if possible) and original parts, but prices are higher.
2. Unofficial workshops are cheaper, but the risk of running into fakes (for example, Redmi batteries with a capacity below the declared one).

Average repair prices (2026, Moscow/SPb):

What to ask the master before repair:

• 🔧 «What parts will you use? (must be original or OEM).
• 📋 «Do you have a job guarantee? (minimum 3 months).
• 💾 «Can you save data? (if the information on the device is important).

A warning for Xiaomi 13 Ultra and Mi TV Q2 75 owners:

⚠️ Warning: These models are protected from unauthorized repairs, and Touch may be blocked after changing the screen or board in an unofficial service. ID (on smartphones or a “Unauthorized Service” warning appears on TV.

💡

If your device is warranty, DO NOT open it yourself – this will void Xiaomi’s warranty obligations.

6 Prevention: How to Avoid Black Screens in the Future

Many issues with Xiaomi inclusion can be prevented by following simple rules:

• 🔋 Don't drain battery to 0%. On Xiaomi smartphones with Li-Po batteries, deep discharge reduces lifespan by 30%.
• 🔥 Avoid overheating.Do not leave your phone charging in direct sunlight (critical temperature for Snapdragon 8 Gen 2 - 60)°C).
• 📲 Update the firmware, but not through OTA, If you have custom recovery (Brick risk 10-15%).
• 💧 Use moisture protection covers for models without official IP-Certificate (Redmi Note 12 is not waterproof!).

For Mi TVs:

• ⚡ Connect through a network filter - voltage surges kill power supplies.
• 🕹️ Don't leave it on. HDMI-CEC And Quick Start, if you don't use it, they keep the charge energized. 24/7.
• 🧹 Clean the air vents with a vacuum cleaner every 6 months (especially for models with a vacuum cleaner). AMLOGIC processors).

Myths you shouldn't believe:

• ❌ «Black screen always means death of motherboard – 60% of cases are to blame for firmware.
• ❌ «If the phone does not turn on, it can be “resuscitated” in the freezer – this will accelerate the corrosion of contacts.
• ❌ «Reset to factory settings removes viruses" - some malware (xHelper) recovers after reset.

FAQ: Frequent questions about the black screen on Xiaomi