Xiaomi TV doesn’t show an image, but there’s sound – what to do?

Xiaomi TV turns on, sound works, but the screen stays black or shows a distorted picture, familiar to many owners. The reasons can be in both trivial settings and serious hardware breakdowns. In this article, we will analyze all possible scenarios, from simply resetting the settings to checking the matrix and power supply.

It's important to understand that if there's sound, then the main board of the TV (motherboard) is functioning, and the problem is localized in the video transmission chain, which narrows the search for malfunction, and we're not going to offer "magic" solutions like "reset the TV" - instead, we're going to give specific steps explaining why they work and what to do if it doesn't work.

The article is suitable for all models of Xiaomi TV: from budget Mi TV 4A/4S to flagship Mi TV Q2/Q1E. Particular attention will be paid to the typical "diseases" of TVs of this brand, for example, problems with firmware or overheating of the MStar chip.

1. Verification of connections and signal sources

Start with the obvious -- check if the black screen is connected to an external device, and even if you're sure the problem is with the TV itself, follow these steps to rule out false positives.

• 🔌 Reconnect the cables. HDMI, AV Or an antenna cable, then reconnect, and sometimes the contacts oxidize or fit loosely.
• 📺 Check the source of the signal. Connect another device (like a console or laptop) to the same port. If the image appears, the problem is in the original device, not in the TV.
• 🔄 Change the port. HDMI. Xiaomi TVs often fail the first port (HDMI 1) because of overheating. Try connecting to HDMI 2 or HDMI 3.
• 🎮 Embedded content test: Run any application (like YouTube or Netflix) directly from the remote. If the image appears, it's the external source's fault.

If you do this manipulation and the screen is black, but the sound is still working, the problem is inside the TV. Move to the next section.

2. Reset settings and update firmware

A black screen when sound is running can be caused by software failure, especially for Xiaomi Android TVs, where firmware errors are a common problem.

1. Soft reset: Hold the power button on the remote (or TV body) for 10 to 15 seconds until the device restarts, sometimes helping with the GUI hanging.
2. Reset to factory settings. Go to Settings → Device → Reset. If the screen does not display the menu, use blind reset: 1. Press the remote: Menu → Settings (cog) → Down ×5 → OK. 2. Confirm the selection with the OK button.
3. Update firmware. Outdated software may conflict with the graphics driver. Update TV through Settings → About TV → Update system. If the screen is not working, download the firmware for your model from the official Xiaomi website and update via USB.

Important: If the TV loads after the reset, but the screen remains black, the problem is in the graphics core of the firmware, in which case only flashing through service mode (section 5) will help.

Download firmware for your model from mi.com| Format the flash drive in FAT32| Copy the update.zip file to the root of the flash drive | Do not remove the flash drive until the update is complete

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3. Diagnostics of hardware malfunctions

If the software methods don't work, you'll have to deal with the hardware.

• 💡 The backlights, if you see the dim contours of the image in bright light, you burn. LED-light-band.
• 🖥️ Matrix or plume: Vertical/horizontal stripes, artifacts or complete absence of image when fully illuminated indicate damage to the matrix or its plume.
• 🔌 Power supply. Insufficient voltage on the backlight or matrix board leads to a black screen.
• 🔥 Overheating of the chip. In models with an MStar processor (e.g. Mi). TV 4S 55) the north bridge often falls off due to overheating.

For preliminary diagnosis, perform the following steps:

If you don't have experience in electronics repair, you should contact a service center, but some problems (such as replacing capacitors in the power supply) can be solved on your own.

4.Illumination problems: how to diagnose and eliminate

One of the most common faults is failure. LED-Xiaomi TVs use LED tapes that degrade or burn out over time:

• The screen is black, but in bright light (for example, from a flashlight) a dim image is visible.
• The lights light up for a second and go out.
• On the screen appear dark spots or uneven light.

To check the backlight:

1. Turn on the TV and light up the flashlight at right angles to the screen, and if you see the image, the backlight doesn't work.
2. Take the TV apart and check the food chain LED-Often the problem is a wire break or a backlight driver malfunction.
3. Measure the voltage on the backlight connector (usually 24V-100V depending on the model), if there is no voltage, the power supply or driver is to blame.

Lighting repair:

• 🔧 Replacement LED-The service costs from 1,500 to 5,000 rubles depending on the diagonal, you can order tapes on AliExpress and replace them yourself.
• 💡 Repair the backlight driver. Often key transistors or resistors fail. It requires a soldering iron and the ability to read circuits.
• 🔌 Checking connectors. Sometimes the contacts on the board or the tapes oxidize. They can be cleaned with alcohol and a swallow.

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If the backlight flashes or fades after a few seconds, the problem may be in the thermistor (temperature sensor) on the back. LED-Try to temporarily turn it off by closing the contacts, so if the backlight works, you need to replace the thermistor.

5. Reflashing the TV in service mode

If the black screen appeared after the update or the Xiaomi TV does not load beyond the logo, but there is a sound - most likely, the firmware flew, in this case, flashing through the service mode (Fastboot) will help.

You'll need:

• USB-cable (preferably original from Xiaomi).
• A computer with ADB and Fastboot drivers installed.
• Firmware for your model (download from the official website or 4PDA forum).

Instructions:

1. Unpack the firmware in the folder from fastboot.exe.
2. Connect the TV to your computer via USB (OTG or Service port on the back).
3. Press the Menu + Up button on the remote and turn the TV on. Hold the buttons for 10-15 seconds until the service menu appears (if the screen is running) or the computer detects the device in Fastboot mode.
4. In the command line, run: fastboot flash all firmware.img fastboot reboot

Attention! The wrong firmware can finally brick the TV. If you're not sure what you're doing, call the service.

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Service mode is not available on all Xiaomi models. If the TV does not respond to the button combination, try using the same. USB-squirrel.

6.Overheating and cooling problems

Xiaomi TVs, especially those with the MStar 6A928/6A938 processor, are prone to overheating, which can cause the graphics chip to shut down, causing the image to disappear when the sound is working.

• The image disappears after 10 to 30 minutes of work.
• The TV is spontaneously restarted.
• There is a strong heat on the back (especially in the processor area).

Decisions:

• 🌀 Dust cleansing. Take the TV apart and blow the CPU radiator out with compressed air. Dust acts as a heat insulator.
• 🧊 Replace the thermopaste. Over time, it dries up and the chip overheats. Apply a new paste (e.g., Arctic). MX-4) processor.
• 🔧 Installation of additional cooling. In some cases, installing a small fan helps (5V) inside.
• ⚡ Lower brightness. Reduce the brightness of the screen to 70-80%, which will reduce the load on the processor and backlight.

If the chip is already damaged (e.g., BGA balls fell off), it will require soldering at a service center, costing between 3,000 and 8,000 rubles.

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To check if the black screen is associated with overheating, point the fan at the TV for 10-15 minutes, and if the image appears, the problem is definitely cooling.

7. When to contact the service: prices and guarantees

If none of the methods worked, the problem is likely hardware and requires professional intervention. Here are the estimated prices for Xiaomi TV repairs in service centers (2026):

Before you take the TV to the service:

• 📋 If you bought the TV less than a year ago, the repairs must be free (provided it is not your fault).
• 🔍 Take a picture of the malfunction. Record a video of the problem, which will help the master to diagnose the cause faster.
• 💬 In some services, it is paid (from 500 to 1,500 rubles), even if you refuse to repair.

If the TV is guaranteed, don't open it yourself, it will void warranty obligations.

FAQ: Frequent questions about the black screen on Xiaomi TV