Why the screen on the Xiaomi phone has darkened: a full analysis of the causes and solutions

Xiaomi's smartphone screen is not just a display, it's a key element of interaction with the device. When it suddenly darkens, dims or stops displaying normally, it's unsettling: you can't tell if the phone is ringing, if notifications are coming, and sometimes it seems like the gadget is dead. But don't panic: 80 percent of the time, the problem is solvable, often without visiting a service center.

The screen darkening on Xiaomi (whether it’s the Redmi Note 10, POCO X3 or the flagship Mi 13) can be caused by software failures as well as hardware malfunctions. It’s important to properly diagnose the cause so as not to waste time on useless manipulations. For example, if a burned-out LED backlight is to blame, neither flashing nor resetting will help — it will require disassembling the device. On the other hand, a bug in the MIUI system can simulate the “death” of the screen, although in fact the display is serviceable.

In this article, we will look at all possible causes of blackouts, from the banal battery discharge to serious motherboard failures, and give clear instructions on how to bring the display back to life. Particular attention will be paid to models with AMOLED- screens (for example, Xiaomi 12T or Black Shark 5), where the problem is often associated with the degradation of organic LEDs.

1.Discharged battery or charging problems

The most obvious but often overlooked reason is the critically low battery charge: When the charge level drops below 3-5%, the smartphone may turn on, but the screen remains dark or barely glows, because MIUI prioritizes power for critical components (processor, memory), and the display lights are no longer enough.

How to check:

🔋 Connect your phone to a charger (preferably the original one from Xiaomi with Quick Charge support). Wait 10-15 minutes — if the screen comes to life, the problem is discharge.
🔌 Try another charger or cable, and sometimes the contacts in the USB-C connector oxidize, and the charging is intermittent.
🔄 If the phone doesn't respond to charging, try pressing the power button for 20-30 seconds (forced reboot).

If the screen flashes after connecting to the charge or shows the MI logo but does not load further, this may indicate a battery failure (bloating, short circuit) or damage to the power controller.

⚠️ Warning: If the phone gets hot when charging but the screen doesn't turn on, disconnect it immediately from the mains! This could be a sign of a battery short circuit - a risk of fire.

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2. Software failures (MIUI, firmware, applications)

Software errors are the second most common cause of screen darkening, and they can manifest in different ways:

📱 The screen is turned on, but the image is barely visible (dim, as if the backlight is off).
🔄 The display flashes or spontaneously changes brightness.
🖥️ The phone is working (sounds, vibrations are there), but the screen remains black.

Most often it's the fault:

🐞 Bugs in MIUI (especially after the update). For example, there was an error in MIUI 14 that caused the sensor to stop responding to touch and the screen to dim.
📦 Application conflict: Some programs (especially those with SYSTEM_ALERT_WINDOW rights) may block normal display performance.
🔧 Incorrect brightness settings. Settings menu → Display → Autobrightness may have been affected by the light sensor.

How to fix it:

Restart your phone in Safe Mode (press the power button → hold off “Switch off” → press “OK” on the request for Safe Mode). If the screen is working normally, the third-party app is to blame.
Reset the display settings: Settings → System → Reset settings → Reset the display settings.
If the problem has occurred after the update, try to roll back to the previous version of MIUI via Fastboot.

Reboot the phone

Check in safe mode

Reset the display settings

Update MIUI to the latest version

Remove newly installed applications-->

Critical information: On Xiaomi models with Qualcomm processors (for example, POCO F3) after a failed update, the protection against the "brick" (EDL-mode) may work, and the screen will be dark, but the phone will be determined by the computer as QDLoader 9008.

3. Damage to the plume or display contacts

Physical damage is one of the most frustrating causes, as it often requires disassembly of the device. The display plume (a flexible cable connecting the screen to the motherboard) can damage due to:

💥 Strikes or falls (even if the body is intact).
🔧 Improper disassembly (e.g. after self-replacement of the battery).
🔥 Overheating (the plume can "step away" from soldering contacts).

Signs of a plume problem:

The screen flashes when you press certain areas of the body.
The image appears only at a certain angle.
Colors are distorted (for example, green or red predominates).
The touchscreen works, but there is no backlight.

How to check:

Connect your phone to your computer. If it's defined as a removable disk, for example, but the screen is dark, the plume is probably damaged.
Light the flashlight on the display at an angle, if you can barely see the image, the problem is the backlight or the plume.
With a light tap on the area near the power button or the camera, try to move the plume, and if the screen goes up for a second, the diagnosis is confirmed.

⚠️ Warning: On AMOLED- screen models (e.g., Xiaomi 11T Pro), the plume is often integrated into the display module. Replacing it requires a complete screen replacement, which is 2-3 times more expensive than repairing the plume on IPS- displays (e.g., Redmi 9A).

Xiaomi model	Screen type	Cost of plume replacement (₽)	Cost of screen replacement (₽)
Redmi Note 10 Pro	AMOLED	- (indistinct)	8 000–12 000
POCO X3 NFC	IPS LCD	1 500–2 500	4 000–6 000
Xiaomi Mi 11	AMOLED	- (indistinct)	12 000–18 000
Redmi 9C	IPS LCD	1 000–1 800	3 000–4 500

4. Failure of illumination (LED or AMOLED)

The backlight is a separate component that can fail regardless of the display itself. In IPS- screens (e.g. Redmi 8A), the backlight is handled by LED-lent, and in AMOLED (e.g. Xiaomi 12), each pixel is individually highlighted.

🌑 The screen is completely dark, but in bright light, you can see a dim image.
🔦 The backlight is uneven (one side of the screen is lighter than the other).
💡 The brightness spontaneously changes or “pulsates.”

Reasons:

🔌 LEDs burned out (often after a voltage surge when charging).
🔧 Remove the light contacts from the board (after a fall or vibration).
🛠️ Degradation AMOLED (natural wear of organic LEDs after 2-3 years).

How to temporarily bring the screen back to life (if the contacts are to blame):

Put the phone on a soft surface.
Light taps on the back (in the camera area) try to “shake” the contacts.
Heat the back cover with a hairdryer (temperature no higher than 50°C) – sometimes this helps to restore the connection.

What to do if the lighting flickers

This could be due to a malfunction of the motherboard's lighting controller, which is repaired by interlocking the chip or replacing the board, with the average cost of repairs being 3,000 to 7,000 ₽, depending on the model. If the phone is older than 3 years, it's often cheaper to buy a new one.

5. Damage to the motherboard or graphics chip

If the screen has darkened after falling, getting moisture or overheating, and all previous methods have not worked, the problem may lie in the motherboard.

🖥️ Graphics chip (in Qualcomm or Mediatek processors).
🔌 Display controller (responsible for transmitting the signal to the screen).
💧 Food chains (after corrosion from moisture).

Signs:

The phone is turned on, but the screen remains black (not even backlit).
On the external display (via HDMI or Miracast) there is an image, but on the main one there is no image.
Artifacts on the screen (stripes, flickering, distorted colors) before completely darkening.

Diagnosis:

Connect your phone to your TV via USB-C → HDMI adapter. If you have a picture, there's a problem with the display module or the plume.
Check if the device is detected in Fastboot (Put Volume Down + Power). If so, the fee is partially operational.
Listen, does the phone make boot sounds (vibration, melody) and if it doesn't, the board could die.

⚠️ Warning: On models with a Mediatek processor (e.g. Redmi 9), memory chips (eMMC or UFS often fall off after a fall) causing the phone to turn on, but the screen does not show the image, and the system does not load, in which case a chip soldering is required, which costs 5,000-10,000 ₽.

💡

If the phone falls into water and the screen turns dark, DO NOT turn it on! immediately remove the battery (if possible) and put the device in rice or silica gel for 2-3 days. Turning on the wet phone leads to short circuit and irreversible damage to the board.

6 Degradation of the AMOLED- screen (pixel burnout)

AMOLED- displays lose their brightness over time due to degradation of organic LEDs. It's a natural process, but it accelerates when:

🔥 Prolonged operation at maximum brightness.
📱 Frequent use of static elements (e.g., navigation panels).
🔋 Overheating (e.g. during games or charging).

Signs of burnout:

The screen became dull, lost the saturation of colors.
On a monotonous background (for example, white) you can see “shadows” from icons or taskbar.
The brightness spontaneously decreases even with manual adjustment.

How to check:

Open a pure white image on your phone (for example, through a gallery), if you see colored spots or uneven backlights, the screen degrades.
Use a burnout test (apps like Screen Test from Google Play).

Decisions:

🔧 Calibration of the screen through the engineering menu (code ##6484## → Display → Screen calibration).
🔄 Replacement of the display module (the only radical method).
📱 Using a dark theme and lowering brightness to slow down degradation.

💡

AMOLED- screens on Xiaomi burn out faster if you use maximum brightness often. The optimal level is 60-70% when you adjust automatically.

7.Influence of external factors (moisture, magnets, temperature)

Sometimes the screen gets darker due to external influences that users don’t always take into account:

💧 Moisture: Even if the phone hasn't sunk, high humidity (such as in the bathroom) can cause contacts to corrosion.
🧲 Magnetic fields: If the phone was lying next to powerful magnets (speakers, charging), it could damage the Hall sensor or compass, which indirectly affects the display.
❄️ Extreme temperatures: When the screen is overcooled (below 0°C) or overheated (above 40°C), the screen may temporarily darken.

What to do:

If the phone is overheated, let it cool in the shade (not in the fridge!).
If you get moisture, do not turn on the device until it is completely dry (at least 24 hours).
Check if metal objects are attracted to the phone (a sign of magnetization).

FAQ: Frequent questions about Xiaomi's darkened screen

My Xiaomi went down and the screen went dark, but the touchscreen worked.

You're probably hitting the backlight plume or the display contacts are gone. Try: You can easily tap the area near the front camera to see if the image shows up. Connect the phone to the TV via HDMI -- if there's a picture, there's a problem with the display or the plume. Contact the service: it's 1,500-3,000 ₽ to repair the plume, it's 4,000 ₽ to replace the screen.

After the MIUI update, the screen became dim. How do you get the brightness back?

This is a known bug in some versions of MIUI 13/14. Solutions: Reset display settings: Settings → System → Reset settings → Reset display settings. Turn off autobrightness and manually set the value to 80-90%. If it didn't work, roll back to the previous version of the firmware via Fastboot.

The screen flashes and spontaneously dims.

The reasons can be different: 🔋 Failed battery (voltage jumps and the lighting controller fails). 🖥️ Failure in the graphics driver (try to update the firmware). 🔌 Bad plume contact (needs a diagnostic service). Start by checking the battery (replace it with a known service) and resetting.

You can hardly see the screen in the sun, but the brightness is at its maximum. Is that normal?

No, this is a sign: AMOLED- matrix degradation (if the phone is older than 2 years); illumination sensor failure (check in Settings → Display → Autobrightness); Light filter contamination (dust under the glass); If the reset did not help, you need to replace the display module.

Can I replace the screen plume on Xiaomi?

Theoretically, yes, but: On AMOLED- screens (e.g., Xiaomi 11 Lite), the plume is inseparable from the display — you have to change the entire module. For IPS- displays (e.g., Redmi 9), the plume can be replaced separately, but you need a soldering iron and experience. Risk: if you change the touchscreen or backlights, if you don't have skills, you better contact the service.