You turned on the Xiaomi Mi TV, but the screen is still black, even though the sound is working normally? Or the image disappeared suddenly while watching? This problem occurs in the Mi TV 4A/4S/4X/5 Pro and other series, but in 90% of cases it can be eliminated independently without going to the service center. In this article, we will analyze all possible causes, from the banal (incorrectly selected signal source) to the serious (breakage of the matrix or power supply).
It's important to know if the image is completely lost (black screen) or distorted (artifacts, stripes, flickering). This is what the diagnostic algorithm depends on. For example, if you see vertical color lines on the screen, the problem is more likely a T-CON board or a matrix plume. And if the screen is just dark, but the backlight is working (visible logo in bright light) - the inverter or LED- driver is to blame.
We have put together proven solutions for all Xiaomi TV series, including Mi TV Q1/Q2, Redmi Smart TV and Mi TV A Pro. Follow the instructions in order - from simple steps to complex. If the problem is in the firmware, you will help disaster recovery via USB; if the hardware - indicate which parts to check first.
1. Checking the source of the signal and cables
So, start with the obvious: maybe the TV just doesn't get the video signal, and even if it used to work, the cable could break or fail.
- π Switch the source: press the SOURCE button (or INPUT) on the remote and select another port (HDMI, AV, TV). If the image appears, there is a problem in the connected device (prefix, computer) or cable.
- π Check the cables: disconnect and reconnect the HDMI/DP- cable. Try another cable or port on your TV. For HDMI use versions of 2.0 and higher β older cables may not support high resolutions.
- πΊ Built-in TV tuner test: Go to the TV menu (Settings β Channels) and start auto-search. If the channels are located but not displayed, the problem is the signal decoder.
Special attention is paid to HDMI-ports. On Xiaomi Mi TV 4S and 5 Pro, the HDMI 3 port is often used for ARC (sound return) and conflicts can arise when connecting to conventional devices. Try connecting to HDMI ZXXPH0008QZ or ZXPH00QXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
β οΈ Warning: If you use extension cords HDMI or adapters (e.g., HDMI β DVI), they may be causing the signal to be missing. Connect the device directly to the TV.
Screen illumination diagnostics
If there's sound, but the screen is completely black, maybe the backlight is not working.
- Turn on the TV and hold the flashlight to the screen at an angle of 45Β°. If you see a weak image (Mi TV logo, menu) - the backlight is turned off.
- Light up on a screen in a dark room: if you notice the contours of the interface, there is a problem in the LED- driver or inverter.
Reasons for turning off the lights:
- π‘ The LED-diodes have burned out (a common problem in the Mi TV 4A models after 3-5 years of use).
- π The power supply is faulty (does not supply voltage to the backlight).
- π οΈ The plume between the matrix and the backlight board has gone.
For a temporary solution, you can try rebooting the TV with a long press on the power button (10-15 seconds), if this does not help, you will need to disassemble the device.
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On Xiaomi Mi TV P1 and Q1, the backlight is divided into zones. If only part of the screen (such as the top half) stops working, the zonal LED driver is to blame.
3. Resetting settings and firmware update
Software failures are one of the most common causes of image loss, especially after you automatically update software or install third-party apps, and here's how to get your TV back to work:
Method 1: Mild discharge
- Turn off the TV for 1 minute.
- Press and hold the Power button on the case (not on the remote!) for 15-20 seconds.
- Put the power on and turn on the TV.
Method 2: Hard Reset (Hard Reset)
- On the TV turned off, press the Menu button on the body.
- Holding it, plug in the power.
- Wait for the recovery menu to appear (about 10 seconds).
- Select Wipe Data/Factory Reset using volume buttons and confirm the selection.
If the image does not appear after reset, try updating the firmware manually:
- Download the latest version of the software for your model from the Xiaomi Support website.
- Unpack the archive and copy the update.zip file to the flash drive (FAT32).
- Connect the flash drive to the TV, go to Settings β About TV β Software Update β Local Update.
β οΈ Warning: Don't interrupt the upgrade process! If the Xiaomi Mi TV 4X or 5 Pro TV is stuck on the logo after you've firmware, wait 10-15 minutes. If there's no change, do a hard reset.
Download official firmware from Xiaomi| Format flash drive in FAT32| Check file integrity update.zip| Disconnect TV from the network before connecting flash drive
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4. Problems with the matrix and T-CON board
If artifacts appear on the screen (colored stripes, flickering, blurring), but the backlight works, the problem may be:
- π± Matrix (physical damage or failure of pixels)
- π§ T-CON board (timing controller β controls the signal to the matrix).
- π The plumes between the matrix and the boards.
How to diagnose:
- Connect the TV to another signal source (like a laptop), and if the artifacts are left, the problem is in the matrix or T-CON.
- Look at the screen from an angle: if the distortion changes, the plume is to blame.
- Tap the TV body in the T-CON area of the board (usually on the right or bottom). If the image flashes, the board is faulty.
For Xiaomi Mi TV 4S 55" and 65" models, a typical problem is the collapse of contacts on the T-CON board. In this case, soldering or replacement of the board will help. The cost of the new T-CON for Xiaomi is from 1,500 to 3,000 rubles.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Black screen, sound is there. | Failed lighting or power supply | Replacement of the LED- Driver or Diodes |
| Colored vertical stripes | Problem with T-CON board or plume | Contacts soldering or fee replacement |
| Screen flickering | Unstable power supply matrix | Checking of capacitors on the food board |
| Image is there, but blurred | Matrix plume malfunctioned | Replacement of the plume or its reconnection |
What does a T-CON board look like?
5. Problems with the power supply
If the Xiaomi TV doesn't turn on at all (no sound, no backlight), or the image disappears after a few seconds after turning on, the power supply is to blame.
- π The TV only turns on after a few attempts.
- π₯ When you turn on, you hear a click, but the screen doesn't light up.
- π₯ The body in the area of the power supply is warming.
What can be done:
- Check the fuse on the power board (usually a glass tube with metal caps) if it burns out, replace it with a similar one.
- Look at the capacitors: swollen or leaky should be replaced. In Mi TV 4A models, 1000 ΞΌF 16V capacitors often fail.
- Call diodes and transistors with a multimeter, and faulty elements will show a cliff or short circuit.
Xiaomi Mi TV 5 Pro and later uses a power supply with overheating protection. If the TV turns off after 5-10 minutes of operation, check the heat paste on the power supply radiator - it needs to be updated.
β οΈ Warning: Power supply is dangerous! Capacitors can keep a charge even after you're off the grid. If you're not sure about your skills, contact the service.
6. Hardware malfunctions: when repairs are needed
If all the previous steps didn't work, the problem is probably hardware, and here are the most common breakdowns and their signs:
| Breakdown | Symptoms | Cost of repair (approximately) |
|---|---|---|
| Faulty matrix | Artifacts, broken pixels, vertical stripes | From 8 000 rubles (replacement of the matrix) |
| Burnt T-CON board | Colored stripes, lack of image during working illumination | From 1,500 rubles (replacement of fees) |
| LED- Driver Failure | The lighting is not turned on, the screen is visible only under the flashlight. | From 2 000 rubles (replacement of the driver) |
| Faulty power supply | TV not turned on, clicks when trying to start | From 2,500 rubles (repair or replacement) |
For Xiaomi Mi TV Q1E and Q2 models with QLED-matrix, repair is more expensive due to the difficulty of replacing the backlight diodes. If the TV is guaranteed, contact the authorized Xiaomi service center - repair will be free.
If the warranty has expired, you can:
- π§ Find a workshop specializing in Xiaomi TV (check reviews!).
- π Buy spare parts yourself on AliExpress or in Russian stores (for example, Chip and Deep).
- π¦ Consider replacing a TV if the repair costs more than 50% of its price.
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Before contacting the service, back up your TV settings through your Xiaomi account (if the screen is even occasionally turned on) and this will save your apps and settings after repair.
7. Prevention of image problems
To avoid repeated failures, follow these guidelines:
- β‘ Use a voltage stabilizer - power surges most often disable the power supply.
- π Update your firmware regularly, but donβt install beta versionsβthey may contain bugs.
- π οΈ Once a year, clean the TV from dust (especially vents). Overheating accelerates the wear of components.
- π Do not leave the TV on for long periods of time in standby mode, which reduces the life of the backlight.
For models with OLED-matrixes (for example, Xiaomi Mi TV Master), it is important to avoid static images (channel logos, gaming HUDs) so that pixel burnout does not occur.