How to turn on the backlight on the Xiaomi TV: all the ways + fixing

Screenlighting on Xiaomi TVs (Mi series) TV 4/4A/4S/5/5X/Q1/Q2 A key element that affects image quality: If the screen becomes dim, the backlight goes off after updating or does not respond to commands, the problem can be in both settings and hardware malfunctions. In this article, we will analyze all working ways to turn on backlight, from basic to advanced, and also tell you how to diagnose a breakdown if none of the methods worked.

It's important to understand that backlight and brightness are not the same thing. Brightness regulates the intensity of the matrix's glow, and backlight is a physical light source (LED-tapes or matrixes that can shut down completely when crashed. - Xiaomi TVs with Android TV Google TV The backlight control is often hidden in the engineering menu or is dependent on the energy saving mode.

1. Checking the basic brightness and backlight settings

Before digging deeper, make sure the problem isn’t trivial settings. On Xiaomi TVs, brightness and backlighting can be adjusted separately — especially on models with Local Dimming feature.

How to check:

• 📺 Press the Settings button on the remote (cogwheel) → Select Display and Sound → Brightness.
• 🔍 If the brightness slider is at a minimum, move it to 50-70% — Sometimes the system resets after updating.
• 🌓 Check the picture mode: in Settings → Display. → Select Standard or Dynamic (Movie or Energy Saving Modes often lower backlighting).
• 🔄 If the screen flashes or the backlight is turned on with a delay, try rebooting the TV: press the Power button on the remote for 5 seconds.

On models Xiaomi Mi TV Q1/Q2 quantum-dot (QLED) The backlight is controlled separately from the brightness to activate it:

1. Go to Settings. → Display. → Additionally. → Illumination.
2. Set the value no lower. 30% (optimally — 40-60%).
3. Turn off the Auto Brightness option if it is active – the light sensor may mistakenly lower the backlight.

2. Enabling backlighting through the engineering menu

If standard settings don't work, the backlight might turn off at the firmware level, and then the engineering menu, where the manufacturer hides the advanced settings, will help, and be careful: the wrong changes here can cause the system to crash.

Instructions for Xiaomi TVs on Android TV:

1. Turn on the TV and go to the main screen.
2. On the remote, press sequentially: Back → Back up. → Down. → Down. → Left. → Right. → Left. → Right. → Left (on some models, the combination may differ - see spoiler below).
3. The Factory Menu menu opens. Select the Backlight section (or BL Control).
4. Set Enable (if Disable is worth) and save the changes with a button OK.

⚠️ Note: In the engineering menu, do not change the settings with the names EEPROM, Panel Reset or Factory Reset – This can cause the TV to reset to factory settings or damage to the matrix.

If the backlight is turned on, but the image is distorted (strips, flickering), reset the display parameters:

• In the engineering menu, look for Reset Picture or Panel Init.
• Confirm the reset and reboot the TV.

3. Hardware methods of illumination

If the software methods did not work, the problem may be in the power supply, LED-Driver or backlight plume. Before disassembling the TV, try the following steps:

• 🔌 Check the power cable and the socket: connect the TV to another socket or use another cable. On Xiaomi models with an external power supply (for example, Mi). TV 4A 32) check the LED on the block - if it does not burn, the unit is defective.
• 🔄 Power reset: Remove the plug from the socket, press the Power button on the TV (not the remote!) for 30 seconds, then turn the TV on again.
• 🔊 Sound check: if there's sound and there's no image, the problem is exactly in the backlight or the matrix.

For diagnosis. LED-You can use a flashlight to illuminate:

1. Turn on the TV and point the bright flashlight at an angle to the screen.
2. If you see a dim image, then the matrix is working, and the problem is that the image is not working. LED-tape-driver.
3. If the screen is not visible at all, the matrix or plume is faulty.

⚠️ Attention: Separation of the Xiaomi TV is unwarranted! If the TV is warranty, contact the service center. Self-repair of the backlight requires soldering skills and knowledge of circuitry.

4. Resetting TV settings to factory

If the backlight went off after a firmware update or settings change, resetting to factory settings will help, which will return all display settings to default values, but will delete installed apps and accounts.

How to perform the reset:

1. Open the Settings. → The device → Reset (or Settings) → System system → Additionally. → Reset).
2. Select Erase All Data (on some models, Factory Data Reset).
3. Confirm the action with a password (if installed) and wait for the reboot.

Backup important data (app list, Wi-Fi settings)

Record the login/password from the Google account (required after reset)

Connect the TV to the network (for automatic setup after resetting)

Make sure the remote is charged (the process will take place) 5-10 minute)

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After discharge:

• Go through the initial setting (selecting language, connecting to Wi-Fi).
• Check the brightness and backlight in the Display menu.
• If the problem persists, update the firmware (see the next section).

⚠️ Note: On Xiaomi TVs with Google TV (Like Mi. TV Q2 2023) after reset, it may be necessary to re-activate the device through the Google Home app on the smartphone.

5. Update of firmware to restore backlight

Backlight failures are often associated with firmware bugs, especially after automatic updates. If the TV turns on but the backlight doesn't work, try updating the software manually.

Refreshment methods:

• 🌐 By air (OTA): Go to Settings. → On TV. → System Update. Click Check Updates and install the latest version.

Through USB:

1. Download the firmware for your model from the official Xiaomi Support website (choose a file with the.zip extension).
2. Unpack the archive and copy the update.zip file to the flash drive (FAT32 format).
3. Connect the flash drive to the TV, go to Settings → On TV. → Update through USB and select the file.

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If after the update, the TV is getting stuck on the Xiaomi logo, perform a forced reboot: press the Power button on the TV body for 15 seconds.

For Xiaomi Mi models TV 4S/5X with the problem of "black screen" after the update will help roll back firmware:

1. Download the previous stable version of the software (for example, from the forum) 4PDA).
2. Rename the file to update.zip and place it in the root of the flash drive.
3. Insert the flash drive into the TV turned off, then pinch on the Menu remote control. + Volume Down and turn on the TV with the Power button.
4. Hold the buttons. 10-15 A few seconds before the recovery menu appears.

Diagnostics of illumination faults

If none of these methods worked, the problem is probably hardware, and the following are typical malfunctions and their signs:

For self-diagnosis will need:

• 🔧 Screwdriver for disassembling the body (usually Torx) T5-T8).
• 📊 Multimeter to check the voltage on LED-ribbons (should be) 30-60V model-wise).
• 🔍 Loop for ration inspection on boards.

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If you are not sure about your skills, it is better to contact the service.Repair backlights on Xiaomi TV Costs 3,000–8,000 rubles (depending on the model and type of breakdown).

7. Alternative methods of controlling the illumination

On Xiaomi TVs with Google Assistant or Mi Home, you can try to turn on the backlight by voice or through an app. This will only work if the problem is not hardware.

Voice control:

• 🎤 Say, “OK Google, set the brightness to 50%” or “Put the light on the TV".
• 📱 Make sure your TV and smartphone are connected to the same Wi-Fi network.

Through the Mi Home app:

1. Open the app and select your TV.
2. Go to the Device Management section → Display.
3. Try changing the brightness settings or turning on Nightlight (sometimes this activates backlighting).

For models with Ambient Light Sensor, try:

• 🌞 To direct a bright light to the sensor (usually located on top or bottom of the frame) – sometimes this causes the system to turn on the backlight.
• 🔘 Settings menu → Display. → Light sensor disable the option Automatic adjustment.

FAQ: Frequent questions about lighting on Xiaomi TV