How to turn on the backlight on the Xiaomi TV: All the ways (2026)

Screenlighting is a key element of any LED-Xiaomi TV, which is responsible for the brightness and contrast of the image. TV suddenly gone out, became too dark or the backlight is not working correctly, the problem can be hidden in both software settings and hardware malfunctions. In this article, we’ll break down all the possible ways to turn on and adjust backlights on Xiaomi TVs – from basic methods through the remote to hidden engineering menus.

It's important to understand that the term "backlight" is often confused with the overall brightness of the screen, LED-The backlight is a separate module that can shut down when you overheat, when you crash firmware, when you get mechanically damaged, and if the screen is completely black, but the sound is working, it's probably the backlight that's the problem. If the image is, but it is too dark – to blame brightness settings or energy saving modes.

This article is relevant for all modern Xiaomi models: Mi TV 4S/4A/4X, Mi TV 5/5 Pro/5X, Mi TV A Pro, Mi TV P1/P1E, Mi TV Q1/Q2 and others. Instructions may vary slightly depending on the version of the MIUI TV firmware (update it before setting up!).

1. Checking the basic brightness settings

Before you sin on hardware problems, make sure that the backlight is not turned off programmatically. Xiaomi has several parameters that affect the brightness of the screen:

• 🔦 Energy saving mode – automatically reduces brightness to save electricity.
• 🌓 Adaptive brightness – adjusts backlighting depending on the lighting in the room (works with the light sensor).
• 🎭 Image modes – “Cinema”, “Game”, “Sport” have different pre-set brightness.
• ⏰ Sleep timer – can completely turn off the screen on schedule.

To check these parameters:

1. Press the button Settings (cogs) on the remote.
2. Go to Settings → Display and sound → Brightness.
3. Turn off the Adaptive Brightness and Energy Saving options.
4. Set the slider Brightness to maximum (100%).
5. Return to Settings → Image Modes and select Standard or Bright.

If you've had this manipulation, you've got the backlight, you've got the problem with the settings. If you haven't, you can move on to the next section.

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On some Xiaomi models (e.g. Mi) TV P1) The brightness is regulated separately for HDMI-Check the settings for the current signal source in the Login menu. → Settings HDMI.

Hardware resetting of backlights (buttons on the body)

If the TV doesn't respond to the remote or the screen stays black, try hardware backlight reset with physical buttons on the body, which works even when the system is getting stuck.

On most Xiaomi models, the control buttons are located on the bottom or back panel.

• 🔘 Power button (power).
• 🔄 Volume buttons +/– (volume +/– (channel).
• 🖱️ The Menu button or OK (on some models).

Resetting instructions:

1. Turn off the TV for 1 minute.
2. Connect the power back, but don't turn on the TV with a button.
3. Press Volume and Menu (or OK) for 10-15 seconds at the same time.
4. Without releasing the buttons, press the Power once.
5. Keep the buttons clamped for another 5-10 seconds until the Mi logo appears.

This method reboots the system and resets the temporary backlight errors, and if the screen caught fire after the reboot, the problem was a software failure, and if it didn't, maybe the power supply or the power supply itself was faulty. LED-lighting.

Disconnect TV from the network for 1 minute

Find the Volume and Menu buttons on the body

Hold Volume + Menu for 10 seconds

Press Power without releasing the other buttons

Hold until the Mi logo appears-->

3. Diagnostics through the engineering menu

If standard methods don't work, you can try turning on the backlight through the engineering menu, which is a hidden settings section where you can test hardware components, including the following: LED-lighting.

⚠️ Warning: Incorrect actions on the engineering menu can cause the TV to crash. Do not change the settings unless you are sure of their purpose!

To enter the engineering menu on Xiaomi TV:

1. Turn on the TV and wait for the main screen to load.
2. On the remote, press sequentially: Back → Back up. → Menus. → Menus. → Up. → Up. → Down. → Down. → Left. → Right. → Left. → Right (in some models, the combination may differ).
3. If the combination is correct, the Factory Menu menu will open.

In the engineering menu, look for the Backlight or LED Control section.

• 🔦 Enable/disable the lighting forcefully (Backlight) On/Off).
• 📊 View the current brightness (Backlight Level).
• 🔄 Conduct a backlight test (Backlight Test).

If the backlight is included in the engineering menu, but in the usual mode it is not, the problem is in the firmware or settings of MIUI TV. Try to update the software (see the next section).

4. Update firmware to restore backlight

Firmware errors are a common cause of broken backlights, especially after automatic updates. Xiaomi regularly releases patches to fix display bugs, so a software update can bring backlighting to life.

There are two ways to update your TV:

If after the update the backlight did not work, try to reset the settings to the factory:

1. Go to Settings → About TV → Reset settings.
2. Select Full Reset (delete all data!).
3. After restarting, reset the TV.

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If the TV doesn’t turn on at all (no button response), try flashing it in Fastboot mode via a PC, which will require a USB-A → USB-A cable and Mi TV Assistant.

Verification of the power supply and LED-module

If the software methods didn’t help, the problem could be in the hardware:

• 🔌 Power supply - puts voltage on the backlight. If the screen fails, the screen may flash or not turn on.
• 💡 LED-tapes – over time, degrade or burn out.
• 🔧 Trains – oxidation or break of contacts between the motherboard and backlight.

For diagnosis:

1. Turn off the TV and remove the back cover (a cross screwdriver is needed).
2. Check visually: Integrity LED-tapes (whether blackened or bloated diodes) connecting plumes to the motherboard (they must be tightly inserted) having bloated capacitors on the power supply.

If you have a multimeter, check the voltage on the backlight connector (should be ~12–24V depending on the model).

⚠️ Attention: Disassembly of Xiaomi TV voids warranty! If the device is warranty, contact the service center. Self-repair is recommended only for experienced users.

On the Mi TV P1E and Q2, the power supply and the lighting board often fail due to overheating. If the TV has been running for a long time in a hot room, let it cool for 2-3 hours before repair.

6. Alternative ways of turning on the backlight

If the standard methods didn’t work, try these non-obvious solutions:

• 🔌 Connecting to another power source is sometimes a problem with the socket or the network filter. Try turning the TV on to another network.
• 🎮 Use of game mode - on some models, the backlight is turned on forcibly when activating the Game Mode mode (in the settings). HDMI-port).
• 📱 Control via the Mi Home app – if the TV is connected to Wi-Fi, try changing the brightness through your smartphone.

It is also worth checking whether the mode for the visually impaired is activated (high contrast with the backlight turned off).

1. Press on the Menu + Volume + remote for 5 seconds.
2. If you have a voice menu, turn off the special features mode.

7. When to contact the service center

If none of the methods worked, it's probably hardware.

• 💥 Lighting flashes or burns unevenly (defect) LED-tape).
• 🔥 The TV emits the smell of burning or warms (power supply failure).
• 🛠️ Vertical stripes appeared on the screen (a problem with a matrix or plumes).
• ⚡ The TV is not turned on at all (motherboard malfunction).

The cost of repairing backlights in Xiaomi depends on the model:

Before the service visit:

1. Take a picture of the serial number (on the sticker at the back).
2. Check if the warranty is maintained (usually 1-2 years).
3. Reset the settings to factory – this will eliminate software errors.

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If the TV is guaranteed, don't tell the service that you disassembled it yourself, which could be a reason for refusing free repairs.

Frequent Questions (FAQ)