You played your favorite movie, and Xiaomi Mi TV or Redmi Smart TV suddenly stopped making sounds? The picture is there, and the audio is not there — the problem is familiar to many owners of smart TVs of the brand. The reasons can be either software (failed settings, firmware error) or hardware (damage to speakers or cables), in 80% of cases, the sound can be restored independently without going to the service center.
In this article, we will provide a step-by-step diagnostics with checklists, a typical error table and instructions for Xiaomi Mi TV 4/4S/4A, Mi TV Q1/Q2, Redmi Smart TV X and others, and we will discuss how to check settings, reset the system, update the firmware and even what to do if the problem is in hardware, and at the end, answer frequent questions from users.
1.Primary check: is it not the headphones problem?
Before digging deeper, make sure that the sound doesn't go to external devices. This is the most common reason for the TV to "silence." On Xiaomi TV, the sound can automatically switch to:
- 🎧 Wireless headphones (Bluetooth), previously connected;
- 🔊 Sound bar or soundbar through HDMI ARC/eARC;
- 📱 Smartphone or tablet (if Miracast mode or DLNA).
To check:
- Press the Menu button on the remote. → Select Settings (⚙️) → Sound.
- Check Out – TV Speakers (or TV Speakers) should be selected there.
- If you need HDMI ARC, Bluetooth or SPDIF, change to speakers.
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On some Xiaomi models (such as the Mi TV Q1E), the sound can stick to the HDMI ARC even after the soundbar is turned off, in which case a reboot of the TV will help (press the power button on the remote for 10 seconds).
And also, look at the Bluetooth light in the upper right corner of the screen, and if it's on blue, it means the TV is connected to a wireless device.
Settings → Bluetooth → [Select device] → Disable2. Verification of physical connections and cables
If the sound is lost when viewed through external sources (console, game console, receiver), the problem may lie in the cables or connectors.
Turn it off and reconnect. HDMI-Cable (Try another port on TV)
Check the cable for damage (curves, ruptures of overflow)
If you are using HDMI ARC, make sure that the cable supports this feature (you need to label "ARC" or "eARC").
Try connecting the sound source via another connector (e.g., Optical). SPDIF instead HDMI)-->
Pay special attention HDMI-On the Xiaomi TVs port HDMI 3 (ARC) It often conflicts with other devices. If the sound is lost when you connect through it, try it:
- 🔄 Switch the cable to another HDMI-connector (e.g., connector, HDMI 1 HDMI 2);
- 🔧 In the TV menu, disable the function HDMI-CEC (Settings → System system → HDMI-CEC).
3. Sound settings: what could have gone wrong?
Sometimes the sound is lost because of a lost setting in the menu of the TV, for example, after updating the firmware or resetting the settings.
| Parameter | Wherever | What should be established |
|---|---|---|
| Sound mode | Settings → Sound → Sound mode | Standard (not Night or Deaf) |
| Balance | Settings → Sound → Balance | 0 (if it is 100 on the left or right channel, the sound will be only on one side) |
| Low frequency amplification | Settings → Sound → Equalizer | (Sometimes due to bass, the sound is completely lost) |
| Digital exit | Settings → Sound → Digital Output (SPDIF) | PCM (if Auto or Passthrough is priced, the sound may not work) |
If the sound does not appear after the changes, try resetting the sound settings to the factory:
Settings → Sound → Additional → Resetting sound settingsWhat to do if the menu does not contain the item "Reset audio settings"?
4. Firmware Update: Why Can It Help?
The common reason for the loss of sound on Xiaomi TV — Firmware errors, like versions. MIUI TV 2.0.15 and 2.0.18 were bugs that caused the sound to disappear after switching between the two. HDMI-The solution is to update the software to the latest version.
How to check and update the firmware:
- Open Settings → About TV → Update system.
- Click Check for updates.
- If a new version is available, click Download and install.
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If the TV does not find updates via the Internet, download the firmware manually from the official Xiaomi website (select your model) and install it through the Internet. USB-accumulator.
If the sound never came back after the update, try rolling back the firmware to the previous version.
- Download the old version of the software (for example, from the 4PDA forum).
- Unpack the archive and copy the update.zip file to the flash drive (FAT32 format).
- Insert the flash drive into the TV, open Settings → About TV → Update via USB.
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Before rolling back the firmware, back up the settings! To do this, go to Settings → On TV. → Backup and save data to USB-accumulator.
5. Hardware malfunctions: when without repairs can not do
If all the software methods have been tried and the sound has not come, the problem may be the hardware.
- 🔊 Damage to speakers – check if they crack when turned on (if wheezing or grinding is heard, the speaker is faulty);
- 🔌 Oxidation of contacts on the sound amplification board (often after wet cleaning or liquid ingestion);
- 🔧 Failure of the audio chip (for example, TAS5707 Mi models TV 4S);
- 🔋 Power supply problems – if the TV does not give enough voltage to the audio track.
How to diagnose a hardware malfunction:
- Connect external speakers or headphones to the TV via a 3.5mm or Bluetooth connector, and if you have sound, the TV speakers are a problem.
- Light a flashlight on the speakers while working - if the membrane is not moving, the speaker is faulty.
- Check if the TV is warming in the audio board area (usually on the right or back), and if it is overheated, it indicates a short circuit.
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On Xiaomi Mi TV Q1/Q2, the speakers are located at the bottom of the body, and if the sound is lost when you press the body in this place, the plume or contact is likely to have left.
⚠️ Warning: If you don't have experience in electronics repair, don't disassemble the TV yourself! High-voltage circuits still have dangerous voltage even after being disconnected.
6. Alternative methods of sound output
If you can't recover the sound from the TV's speakers, you can use external devices.
- 🎵 Bluetooth Column or Headphones: Open Settings → Bluetooth. Enable search mode and connect the device. In the audio menu (Settings) → Sound. → Sound output) select your Bluetooth device.
- 🔊 Sound panel through HDMI ARC: Connect the soundbar to the port HDMI 3 (ARC) Turn on the TV on the menu. HDMI-CEC and ARC. Select in the sound settings HDMI ARC.
- 📶 Wi-Fi speakers (Mi Home, Google Home): Install the Mi Home app on your smartphone. Connect your speaker and TV to the same Wi-Fi network. In the TV audio settings, select Mi Home Speaker.
If you use a console (Tricolor, NTV+) or a game console, the sound can be output directly through them:
→ Sound → Output: HDMI (not SPDIF or RCA)7. Frequent User Errors and How to Avoid Them
Many problems with sound on Xiaomi TV It's caused by the unobvious actions of users.-5 mistake:
| Mistake. | Effects of consequences | How to fix it |
|---|---|---|
| Disable HDMI-CEC in settings | The sound is not transmitted to the soundbar via ARC. | Include HDMI-CEC in Settings → |
| Use of uncertified HDMI-cable | The sound or image disappears at high resolution. | Buy a cable labeled High Speed HDMI or Premium Certified |
| Installation of custom firmware (for example, ATV) | Do not work speakers, errors of the sound driver | Return to the official firmware via Fastboot |
| Resetting settings without disconnecting from the network | The sound disappears after the reboot | Before resetting, turn off the TV from the socket for 1 minute |
| Connecting to TV via DP-to-HDMI adapter | The sound only goes through the PC speakers. | In PC settings, select Transmit sound to HDMI |
⚠️ Note: If you have installed custom firmware (for example, ATV Or LineageOS, the sound may not work due to the lack of drivers for the audio chip, in which case only returning to the official software via Fastboot will help.