When the beloved Xiaomi Mi TV suddenly stops making sounds, it can be taken by surprise while watching a movie or a football game. Users often find that the image on the screen is there, but the audio track is completely missing, or the sound has become quiet and intermittent.This is a common problem that can be caused by software failure, improper settings or physical damage to components.
Before you panic and bring your device to the service center, you need to do your own diagnostics. Most of the time, the malfunction is in software or randomly changed audio output settings. A competent approach to troubleshooting allows you to return the device to work in minutes without unnecessary costs.
In this article, we will discuss in detail all possible causes of sound loss on Xiaomi and Redmi smart TVs. We will look at both software solutions and hardware aspects so that you can consistently eliminate every factor that affects the operation of the audio system.
Primary Diagnostics and Verification of Volume Settings
The first thing you need to do is make sure that the problem isn't caused by a banal blackout or silence. The remote often has a separate Mute button that you accidentally tap blocks the audio output, and check if the icon of the crossed-out speaker is on the screen.
Also worth checking is that the volume is set to a minimum. Sometimes system failures can drop the sound level to zero when switching the signal sources. Make sure the volume slider is raised to a comfortable level, and try changing it in both directions.
⚠️ Warning: If a visual indicator is displayed on the screen when changing the volume settings, but there is no sound, this indicates a problem with signal transmission or internal speakers, not with the remote control.
It is important to check whether Night Mode or Silent View is activated in the sound settings.These features are designed to lower the volume level at a later time of day, but can create the illusion of a breakdown if the user forgets about them. Turn off all additional audio effects such as equalizer or surround sound to check for a clean signal.
Check the source of the signal. If you're watching TV on the air through a built-in tuner, try switching to a YouTube or Netflix app. If there's sound in the apps and there's no TV in the channels, the problem may be on the provider's side or in the settings of a particular channel.
Problems with connecting external devices and HDMI
If you use external devices such as consoles, game consoles or computers connected via HDMI, the problem often lies in the audio protocols. Xiaomi TVs may incorrectly determine the format of the audio stream coming from an external source.
Try physically reconnecting the HDMI cable. Remove the plug from the socket, wait a few seconds and insert it back before the click. Sometimes oxidation of the contacts or poor contact leads to loss of the audio channel, even if the video signal is transmitted normally.
In the TV settings, find the partition that handles the HDMI input. Often there's an option to choose the sound format. Try changing the PCM to Dolby Digital or vice versa. Some older models of receivers or sound systems don't support modern compression formats, which leads to silence.
If you have an optical output or HDMI ARC audio system connected, make sure the right output mode is selected in the TV menu. In the Settings → Sound → Output section, the option should be “External speakers” or “HDMI ARC” rather than “TV Dynamics”.
Software reset and system reboot
One of the most effective ways to eliminate software glitches is to completely reboot the device. Unlike a simple remote shutdown, which often puts the TV in standby mode, a full cycle of on and off clears RAM and restarts system processes.
Do a cold reboot: turn off the TV with the remote control, then pull the power cord out of the socket. Wait at least 2-3 minutes for the capacitors on the board to fully discharge. Then turn on the device again and check for sound.
☑️ Checklist for a quick reboot
If a simple reboot didn’t work, you can try resetting the audio settings to factory values. Go to Settings → General → Reset (or a similar path in your version of Android TV).
⚠️ Note: Full Factory Reset will remove all installed apps, logins and personalized settings. Use this method only if other methods have not helped.
In some cases, cleaning the cache of the system application responsible for processing sound helps. Go to the Applications section, find system processes related to audio (for example, Audio Service), and select Clear cache. This is secure and will not delete your personal data.
Firmware updates and system errors
Xiaomi developers regularly release software updates that fix known bugs, including audio issues. An outdated firmware version may conflict with new versions of apps or codec formats.
Check for updates in Settings → Device → System Update. If the system suggests you install a new version, agree and wait until the process is complete. During the upgrade, the TV may reboot several times.
What to do if the update is not automatically updated?
Sometimes the problem occurs immediately after the update is installed, in which case it may be necessary to roll back to the previous version or wait for a patch from the manufacturer. The critical factor is the stability of the Internet connection at the time of installing the updates, since interrupting the download of files can damage the system audio libraries.
If you have a third-party firmware or a modified version of Android installed, the sound problems may be caused by driver incompatibility, and in such cases, it is recommended to return to the stock version of the software.
Configuring digital output and audio formats
Modern TVs support a variety of audio formats, from simple stereo to multi-channel Dolby Atmos. If your TV is connected to an old receiver or sound panel, they may not “understand” the format being transmitted, which causes the sound to disappear.
Go to the advanced audio settings and find "Digital output" or "HDMI Audio." Try switching from "Auto" to "PCM." The PCM format is versatile and uncompressed, it is supported by almost any audio device.
The table below shows the main formats and possible reasons for their incorrect operation:
| Format | Description | Possible problem |
|---|---|---|
| PCM | Uncompressed stereo or multichannel sound | Rare problems, basic format |
| Dolby Digital | Compressed multi-channel sound | Incompatibility with old receivers |
| Dolby Atmos | Next generation surround sound | Requires HDMI 2.1 and specialty hardware support |
| DTS | Alternative compression format | Lack of a license for decoding in TV |
Experiment with settings by sequentially changing settings, and if you have sound after switching to PCM, your external audio device does not support the previous encoding format.
Hardware malfunctions and repairs
If the software methods fail, there's a high probability of physical failure: Xiaomi TVs have built-in speakers and an audio amplifier on the motherboard for sound, speakers can fail due to power surges or factory defects.
You can check the speakers by connecting the headphones to a 3.5 mm connector (if you have one), or by sending the sound through a Bluetooth speaker, and if there is sound through external devices, but not through the built-in speakers, then it is in them or in the plume that goes to them.
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Use Bluetooth headphones for quick check: if there is sound in the headphones, then the motherboard and software are working, and the problem is in the physical speakers of the TV.
Another common cause is capacitor bloating on a power board or audio module, which can happen over time or because of unstable voltage on the network, and visually this is only noticeable when disassembling the case.
⚠️ Warning: Self-disassembly of the TV and repair of electronic components deprive you of warranty. If the device is warranty, immediately contact an authorized service center.
It's also worth checking the integrity of the plumes. When transporting or scrupulously cleaning the screen, the connectors going to the speakers could move away. Careful reconnecting of the plume sometimes solves the problem instantly.
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If the sound is absent on all sources and after a complete reset, and at the same time the external speakers work normally - it is likely that the built-in speakers or audio codec on the board will fail.
Use of alternative methods of sound output
If repairing the built-in audio system is temporarily impossible or impractical, workarounds can be used. Android-based TVs make it easy to connect external acoustics.
The easiest way is to use Bluetooth. Connect a wireless speaker or headphones to your TV. Go to Settings → Remotes and Accessories → Add an accessory and follow the instructions on the screen.
Better audio can be obtained through optical output (S/PDIF) or through the AUX connector, connecting active computer speakers or home theater, not only solve the problem of silence, but also significantly improve the sound quality compared to the standard speakers.
There are also special HDMI-sound extractors that “pull” the audio stream from HDMI-And they're going to send it to analog speakers, and it's a universal solution for all kinds of TVs, including Xiaomi.