The dark screen on Xiaomi devices is one of the most common problems faced by users as smartphones (Redmi, POCO, Mi, and TVs (Mi) TV, Redmi TV). This can range from no image at all to dim lighting, flickering, or darkening areas, and 80 percent of the time, hardware malfunctions are to blame, but sometimes the problem is software failures or incorrect settings.
This article will help you understand why the screen suddenly went out, became dull or displays content with distortions, we will analyze 12 key reasons - from a banal discharge of the battery to damage to the plume or matrix, and give step-by-step instructions for diagnosis and repair. Special attention will be paid to the unique โchipsโ of Xiaomi, such as the Ultra Dark Mode mode in firmware. MIUI or problems with backlight drivers in Android TVs TV.
1.Discharged battery or power problems
The most obvious but often ignored reason for a dark screen is a full battery drain. On Xiaomi smartphones, at a charge level below 3%, the device may not show signs of life even if you plug in a charge. TV a similar situation occurs when voltage surges or a faulty power supply unit.
How to check:
- ๐ Connect the device to the original charger (for smartphones) or check the socket (for TV).
- โก Try another charger or cable โ unoriginal accessories may not provide enough current.
- ๐ Leave the device on charge for 15 to 30 minutes. If the indicator does not light up, the problem may be in the power controller.
On Xiaomi TVs, a dark screen when turned on is often associated with a malfunction of the capacitors in the power supply. If the indicator flashes after pressing the switch on, but the image does not appear, this is a sure sign of hardware failure.
Firmware failures or "black screen of death" (BSoD)
Software failures are the second most common cause of dark screens, and on Xiaomi smartphones, this can happen after:
- ๐ฑ Failed update MIUI (especially in beta versions).
- ๐ Hard Reset (Hard Reset) via Recovery Mode.
- ๐ ๏ธ Installation of custom firmware or modified kernels.
On Mi TVs. TV A similar problem occurs when interrupting Android updates TV Or an application conflict, like if you're in front of a dark screen. APK-files from unknown sources.
How to diagnose:
- Connect your smartphone to your PC and check if it is determined by ADB (Adb Devices command. If yes, software problem.
- On TV, try logging into Recovery Mode (hold Power). + Volume Down on the remote).
What to do if Xiaomi phone does not respond to charging and buttons?
3. Damage to the plume or display connector
Physical damage โ the scourge of Xiaomi smartphones with removable rear covers (for example, Redmi Note) 8/9 or POCO X3). Even a minor impact or fall can lead to:
- ๐ Disconnection of the display plume from the motherboard.
- ๐ฅ Cracks on a flexible printed circuit board (FPC).
- ๐ง Oxidation of connector contacts (especially after moisture hits).
On Xiaomi TVs, a similar problem occurs when sloppy transportation or overheating - the matrix plume may move away or get damaged. T-CON charge (matrix controller).
Signs of plume damage:
- The screen flashes when you press the body.
- The image appears only at a certain angle.
- Colors are distorted or there are vertical stripes.
Disassemble the device (if you have experience)
Check the density of the plume to the connector
Look for cracks or oxidation
Try to connect another (knowingly working) display-->
4. Backlight malfunction (LED-ribbon)
If the Xiaomi screen is light but dim (the image is barely visible from an angle), the problem is probably the backlight.
- ๐ก Burnt out. LED-light-diode.
- ๐ Faulty lighting driver (part of motherboard).
On Mi TVs TV lighting is implemented through LED-tapes that degrade over time. Typical symptoms:
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The screen turns on, but after 2-3 seconds it goes out. | Overheating LED-tape-driver | Replacement of thermal paste, ventilation check |
| Dark spots at the corners of the screen | Detachment LED-tape | Re-sticking or replacement of tapes |
| The lighting flashes at a frequency of 1-2 Hz | Inverter malfunction | Replacement of the inverter board |
Important: on Xiaomi Mi series TVs TV 4S/4X often fails the lighting driver BP9619Q โ Replacing it is cheaper than buying a new matrix.
5. Ultra Dark Mode and other software "features"
Xiaomi is known for its โhidden featuresโ that sometimes play a cruel joke. MIUI 12+ There's an Ultra Dark Mode that, under certain conditions, can make the screen almost invisible:
- ๐ Through the screen settings โ Additional settings โ Ultra Dark Mode.
- ๐ Automatically at low charge level (on some models).
- ๐ ๏ธ Through the Engineering Menu (code #36245##).
How to turn it off:
- Connect your phone to your PC and use it. ADB: adb shell settings put secure dark_mode_system 0
- If the screen responds to touch, try blindly pressing: Settings โ Screen. โ Dark subject matter โ Turn it off.
On Mi TVs. TV The same effect is given by the Eye Comfort Mode function, which reduces the brightness to a minimum. โ Display and sound โ Comfort mode for the eyes.
๐ก
If Xiaomiโs screen is dim after the update, try rolling back to the previous version. MIUI Fastboot. The instructions are on the forum. XDA Developers (Search by your device model).
6. Damage to the matrix or graphics chip
If the screen is completely black, but the device makes sounds (calls, notifications), the problem may lie in:
- ๐ฅ๏ธ Damage to the matrix (cracks, breakdowns, detachment of layers).
- ๐ง GPU malfunctions (on smartphones โ Adreno or Mali, on TV โ MStar or Amlogic).
How to distinguish a matrix from a graphics chip:
| Sign. | Matrix | Graphic chip |
|---|---|---|
| Image is present but distorted (artifacts, stripes) | โ No. | โ Yes. |
| The screen does not glow, but the backlight works (visible in bright light) | โ Yes. | โ No. |
| The device overheats when you try to turn on the screen | โ No. | โ Yes. |
On Xiaomi TVs with Amlogic chips (e.g. Mi) TV 4A) Graphics accelerator often fails Mali-450. This is manifested in the form of โsnowโ on the screen or complete absence of the image when working sound.
๐ก
If the Xiaomi smartphone has a black screen, but the phone vibrates when it touches, it's 90 percent likely that the matrix or the plume is to blame. If there's no vibration, the motherboard or the firmware is the problem.
7. Conflict of applications or services
Sometimes dark screens are caused by app side effects, especially those that use overlays (such as launchers or screen lock programs).
- ๐ฑ Second Space (Second Work Environment) MIUI).
- ๐ Screen locking applications (AppLock, Smart Lock).
- ๐ฎ Emulators (BlueStacks, MuMu Player) if used on a PC with a connected phone.
On Mi TVs. TV similar problems:
- ๐บ Informal firmware (ATV or LineageOS).
- ๐ฌ Pirate versions of Kodi or IPTV-player.
- ๐ Automatic updates to Google Play Services.
How to eliminate:
- Download to Safe Mode (hold power) + Volume Up when you turn on. If the screen is working, it's third-party software.
- On the TV, reset to factory settings via Settings โ System system โ Reset.
adb uninstall com.package.name
(The name of the package can be found through adb shell pm list packages).-->
8. overheating or moisture inside the device
A dark screen can be caused by heat throttling or moisture, as seen on Xiaomi smartphones:
- ๐ฅ The screen goes out when charging or heavy load (games, video).
- ๐ง A notification of Moisture appears in the charging connector (even if it is not there).
- ๐ก๏ธ The hull is hot to the touch.
On Mi TVs. TV overheating leads to automatic shutdown of the backlight (fire protection), most often affected models with passive cooling (Mi). TV 4S 55" and analogues).
What to do:
- ๐ Disconnect the device immediately! Continuing to work may cause a fire.
- ๐ Let it cool for 1-2 hours.
- ๐ง If the problem recurs, replace the heat paste on the chip or check the cooler (on TV).