Have you turned on a Xiaomi Mi TV, Redmi Smart TV or another model of the brand – the sound plays and the screen stays black or flashes? This problem occurs in 15-20% of users, and in 80% of cases it can be eliminated without going to the service center, the reasons range from trivial (weakened HDMI cable) to serious (matrix or motherboard malfunction).
In this article, we'll look at all the possible causes of missing images when working sound, from the simplest checks to the methods that require disassembling the TV, how to tell a software failure from a hardware failure, what settings to check first, and when it's really time to carry the equipment for repair. For convenience, we've compiled step-by-step photo instructions, a table of typical symptoms and their solutions, and answers to frequent questions.
If your Xiaomi TV is under warranty (usually 12-24 months), don’t rush to disassemble it yourself – this can void warranty obligations.
1. Connection verification: cables, ports and signal sources
Start with the obvious, physical connections, and 30 percent of the time, the problem is a weakened cable, an oxidized contact, or a faulty signal source, and even if you're "sure" that everything is connected correctly, follow these steps:
- 🔌 Turn off and reconnect the cable. HDMI (Check both ends on the TV and on the source device (set-top box, computer, game console).
- 🔄 Try another port. HDMI Xiaomi Mi has a TV set. TV 4S/5 New models usually 2-3 Ports – One of them may be damaged.
- 📺 Switch the signal source with a button SOURCE or INPUT Sometimes the TV hangs on a non-existent entrance.
- 🔍 Check the cables for damage: bending, incisions, melted areas, especially for cheap cables or if they're being chewed by pets.
If you use a set-top box (Android TV Box, Apple TV, etc.), try connecting it to another TV or monitor, if an image appears, there is a problem in the Xiaomi TV, if not, it is the cable or the set-top box.
Important for owners of Xiaomi Mi TV Stick: if there is sound and no images, check if the device overheats. Overheating is a common cause of black screens on compact TV set-top boxes. Turn it off for 10 minutes, then reconnect.
2. Diagnostics of hardware faults without disassembly
If the cables didn't work, we'll go to the hardware diagnostics, and you can see a lot of the breakdowns indirectly without taking the TV out.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The screen is black, but there is backlight (light indicators, visible reflection in bright light) | Matrix or plume malfunction | Replacement of the matrix or reconnection of the plume (requires disassembly) |
| Image appears 5-10 minutes after inclusion | Problems with capacitors on the food board | Replacement of capacitors (requires soldering) |
| The screen flashes or artifacts appear (stripes, dots) | Failure of the video processor or graphics chip | Diagnostics in the service, it is possible to replace the chip |
| The sound is there, but the screen is completely black (not even backlit). | Failure of the power supply or backlight inverter | Checking voltages on the board, replacing the block |
How to check the backlight: in a dark room, put a flashlight on the screen at an angle, and if you see a weak image, the problem is the backlight inverter or the light inverter. LED-This is one of the most common breakdowns in Xiaomi Mi. TV 4A/4C after 2-3 service.
How to distinguish a matrix malfunction from a payment problem?
Fault test HDMI-port: if you have the option, connect the TV to another interface (for example, via a different interface) AV or USB If the image appears, the problem is HDMI-port or its controller on the board.
⚠️ Note: If the Xiaomi TV has been exposed to power surges (such as after a thunderstorm), do not turn it on again without checking the power supply! this can cause cascading failure of components and increase the cost of repairs in the home. 2-3 once.
3. Software glitches: reset, update and settings
If the hardware diagnostics didn't reveal any problems, the reason for the lack of image could be a software glitch, which is especially true for Xiaomi TVs on Android TVs, where firmware errors or application conflicts are not uncommon.
- 🔄 Restart the TV with a long power button hold (10-15 Sometimes the system freezes during the initialization stage of the display.
- ⚙️ Reset the settings to the factory through the recovery menu. To do this: Turn off the TV. Press and hold Menu. + Volume - on the case (not the remote!) Hold the buttons, turn on the TV and hold them. 10-15 You can have a second until the Recovery menu comes up. data/factory reset using volume buttons and confirm the choice.
Update the firmware manually
Official website of Xiaomi
Download firmware for your model from the official website
Format the flash drive in FAT32
Copy the firmware file to the root of the flash drive (without folders)
Connect the flash drive to the TV and restart it-->
Important for Xiaomi Mi TV 4/4S/5 models: After resetting, the TV may require re-association with the Mi Account. If you do not remember the login details, prepare them in advance or untie the device via account.xiaomi.com.
If after resetting the image appeared, but the TV is unstable (for example, periodically disappears picture), check the settings of the image mode:
- Go to Settings → Display and Sound → Image Mode.
- Select Standard over Dynamic or Movie – sometimes these modes conflict with the matrix drivers.
- Turn off Auto Brightness (if any) as the light sensor may be malfunctioning.
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If the TV stopped turning on after the firmware update, try to roll back to the previous version. To do this, download the old firmware and install it in the same way (via USB).
4.Control and control problems
You might think that the remote has something to do with it, if there's sound, and in fact, incorrect commands from the remote can block the output of an image.
- 🎮 Game Mode is activated, which sometimes conflicts with video processing.
- 🔇 Power saving mode is enabled, which turns off the screen illumination at low activity.
- 📶 Pressed the Mute button on the remote from another device (for example, from the air conditioner), which can block some functions.
How to check:
- Remove the batteries from the remote for 30 seconds, then insert them back in. That will reset the settings.
- Try controlling the TV through the official Mi Remote app (available for Android and iOS), and if the image appears, the remote is a problem.
- Check if any button on the remote is stuck, so you can press each button in turn and listen to it click.
If you suspect that the remote is sending incorrect signals, reset its pairing:
- On the remote, simultaneously press the Menu + OK button for 5 seconds.
- Hold the remote to the TV at a distance of 10-15 cm and hold OK for 10 seconds until the indicator blinks twice.
⚠️ Note: If you use a universal remote (for example, from a cable TV provider), it may conflict with the original Xiaomi remote.In this case, turn off the universal remote and try to control the TV via Mi Remote.
5. Problems with signal sources: consoles, consoles, PC
If a Xiaomi TV doesn’t show an image only when connected to a particular device (like a PlayStation or computer), the problem may be incompatible permissions or source settings.
- 🖥️ Check the resolution on the source device. For example, on a PC, go to Screen Settings and set the resolution. 1920×1080 frequency-wise 60 Hz (even if the TV supports) 4K, Sometimes it helps to lower the resolution).
- 🎮 Update the firmware of the console or console. for example, Xiaomi Mi Box S had problems with displaying images on Xiaomi Mi TVs TV 4 in firmware over 2021.
- 🔌 Use a different cable. HDMI. For 4K-Content needs a version cable HDMI 2.0 or higher: Older cables can transmit sound, but don't pull video.
- 🔄 Switch the mode. HDMI On some devices (e.g., video cards) NVIDIA) You need to manually select the mode. HDMI 2.0 in settings.
For game console owners (PS4/PS5, Xbox):
If the Xiaomi TV previously worked with the console, but after the update stopped showing the image, try:
- Connect the console to another TV and reset the video output settings (on PlayStation this is done by holding the power button for 7 seconds before the second signal).
- Disable the HDR and Dolby Vision console settings – sometimes these formats conflict with signal processing in Xiaomi TVs.
- Enable the low latency (Game Mode) mode in the settings of the TV if it is turned off.
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If the TV doesn’t show images from only one device and works with others, the problem is with the source of the signal, not the TV itself.
6.When you can not do without a service center: signs of serious breakdowns
If none of the previous methods worked, it is likely that Xiaomi TV needs professional repair.
- 💥 The TV does not turn on at all (no sound, no lights) - the problem is in the power supply or motherboard.
- 🔥 There is a smell of burning or visible melted elements on the board – you need to replace components.
- 📉 The image appears only after the "warm-up" (through the 10-30 minutes) - capacitors or matrix power elements are defective.
- 🔧 The screen is physically damaged (cracks, broken pixels, liquid drips) - you need to replace the matrix.
- 🔌 Port port HDMI or other shattered/broken connector - soldering or replacement of the connector is required.
Cost of repairs in the service center (example prices for Moscow, 2026):
| Type of breakdown | Cost of repair (₽) | Time (days) |
|---|---|---|
| Replacement of the power supply | 2 500 — 4 000 | 1-2 |
| Matrix repair/replacement | 8000 – 20,000 (depending on model) | 3-7 |
| The soldering of capacitors on the board | 1 500 — 3 000 | 1-2 |
| Replacement HDMI-port | 2 000 — 3 500 | 1-3 |
| Diagnosis + flashing | 1 000 — 2 500 | 1 |
How to choose a service center:
- 🔍 Check if the center has official Xiaomi accreditation (list of partners on the website mi.com).
- 📄 Check if you have a warranty for repairs (at least 3 months).
- 💬 Read reviews on Yandex.Maps or 2GIS – especially pay attention to complaints about “imposing unnecessary work».
- 💰 Compare prices in 2-3 If the difference is greater 30%, That's a reason to be wary.
⚠️ Note: If the TV is guaranteed, do not agree to repair in unofficial services - this automatically voids the warranty Xiaomi. Even if the wizard promises "not to put a seal", the manufacturer can refuse warranty service if traces of interference are detected.
7 Prevention: How to avoid problems in the future
To minimize the risk of recurrence, follow these guidelines:
- ⚡ Use a network filter to protect against surges, and even if your home has stable electricity, the filter will keep your equipment from impulse interference.
- 🔌 Do not pull the cables at the time of signal transmission (for example, HDMI This may damage the port or controller.
- 📦 Update your firmware regularly, but don’t install bat versions – they often contain bugs that affect the output of the image.
- 🌡️ Avoid overheating: do not put the TV in closed niches, provide ventilation (minimum 10 cm of free space at the back).
- 🧹 Clean the ports of dust every 6 months with a dry brush or a spray of compressed air.
For models with OLED-screens (Xiaomi) OLED Vision: To avoid pixel burnout, do not leave a static image (such as a channel logo) on the screen for more than 2 hours.
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If you often connect different devices to the TV (laptop, console, console), use HDMI-It's a hub with a switch, and it'll reduce the wear and tear on the TV's ports and make it easier to manage the sources.