When a favorite TV series or movie is turned on, the screen appears on the screen but no audio accompaniment can spoil the mood of any user. Owner of Xiaomi equipment often faces the fact that the Android TV system installed on the TV can give software failures that block the output of audio. Sometimes the problem lies in the banal switching of the speaker mode, and in other cases requires a deep diagnosis of settings or even flashing the device.
Before calling the wizard or bringing the TV to the service center, you should conduct a number of diagnostic measures yourself. In most cases, the lack of sound on the Mi TV P1, A2, 4S or older versions is due to a software conflict of applications or an incorrectly selected signal source. Below we will discuss in detail the algorithms of actions that will help restore the audio system to work without unnecessary costs.
Don't panic if the sound is lost immediately after upgrading the system or connecting a new console. Modern Xiaomi TVs have a complex logic of processing digital streams, and sometimes a codec failure or changing the parameters of HDMI-CEC can temporarily disrupt data transmission.
Primary Diagnostics and Verification of Physical Connections
The first step should always be to check the basics that are often overlooked in a hurry. Make sure the TV is not in "Mute" mode, as randomly pressing a button on the remote easily passes by attention. Also check the volume level, as some applications may have their own independent volume settings, different from the system.
If you use external signal sources, such as game consoles, satellite receivers or laptops, the problem may lie in the HDMI cable. Bad contact or damage to the wire often leads to the loss of the sound channel, while the video signal continues to be transmitted. Try to reconnect the cable to another HDMI port or replace it with a knownly serviceable one.
⚠️ Note: When using adapters or adapters HDMI-DVI or HDMI-VGA Remember that some of them don't transmit audio, and in such cases, the sound will be completely lost, and you will need a separate connection of the audio cable.
It's important to check if the signal source is correctly selected in the TV menu. If you switched to HDMI 1 input and the cable is connected to the second port, the TV can show a black screen or broadcast an image from another device where the sound is turned off.
Customization of sound parameters in the Android TV menu
The Android TV operating system that powers modern Xiaomi TVs provides advanced audio management capabilities, but also creates a breeding ground for setting conflicts. Go to the main menu and select Settings, then go to the Sound section. Here you need to pay attention to the Digital Output or S/PDIF option.
A common problem is the incorrect output format. If you don't have an external audio system connected, the mode should be in the PCM position. If you choose the Dolby Digital or Auto format, and the embedded speakers can't decode this format (or it is blocked by the licensing restrictions of the region), the sound will disappear completely.
☑️ Checking the sound settings
It's also worth checking the equalizer and the various sound profiles. Sometimes the user accidentally activates the "Night" or "Silent Voice" mode, which greatly lowers the frequency levels, making the sound almost inaudible. Resetting the audio settings to factory values often solves the problem of software glitches.
Some versions of MIUI for TV firmware have a bug where the sound is not activated after you leave standby mode, in which case it helps to simply switch the input source and go back. If this does not help, try changing the region in your TV settings (for example, from India to Russia or Global), as different regions apply different audio codecs and broadcast standards.
Problems with external devices and HDMI-ARC
Connecting soundbars, home cinemas or AV-port-port receivers HDMI ARC (Audio Return Channel is a popular way to improve sound quality, but it is the one that causes failures most often. HDMI-CEC, allowing you to control the volume of an external device from the TV remote, sometimes works incorrectly, "taking" the sound on a non-existent or turned off device.
If the sound is gone after you have connected the soundbar, try turning off the CEC control function in the TV settings. On Xiaomi TVs, it can be called Mi Link, CEC or Device Management. Once you turn off this feature, the TV will stop trying to transmit the sound over ARC and output it through the built-in speakers.
Why does HDMI-ARC not work on older receivers?
Check the audio output settings in the app itself you're using. For example, YouTube or Netflix have separate audio settings that can override system settings. If the app has 5.1 playback and you have a stereo TV, the sound may disappear or be distorted beyond recognition.
Failures in the application and operating system
Apps installed on Xiaomi TVs can accumulate cache that eventually leads to media content playback errors. If the audio is only lost in one particular application (for example, only in ivi or Okko), the problem is localized in it. Go to Settings → Applications, find the problem software and select Clear Cache and Clear Data.
Overflowing RAM is another common reason why Android TV stops processing audio streams correctly. If the TV hasn’t rebooted for a long time, background processes can block the sound driver. Full reboot of the device through the off menu (namely, “Reboot”, not just turn off the button) helps to reset temporary errors.
| Symptoms. | Possible cause | Method of decision |
|---|---|---|
| It's sounding, but it's very quiet. | Night mode or low level in the app | Check the equalizer and application settings |
| The sound comes and goes. | Poor HDMI contact or Wi-Fi interference | Replace the cable, check the router |
| There's no sound on YouTube. | App cache or version bug | Clear cache, update app |
| Total lack of sound everywhere | Driver failure or hardware breakdown | Reset to factory settings |
And remember the date and the time. Surprisingly, a downed date in your system settings can cause DRM certificate errors, causing protected content (high quality movies) to play without sound or not at all. Set up automatic time synchronization over the network.
Update firmware and reset settings
Xiaomi regularly releases updates for its TVs to fix bugs, including those related to sound. → On TV. → System update and check for new versions of the software. If the automatic update does not work, you can download the firmware from the official website to the official website USB-drive-in.
💡
Before updating the firmware, be sure to remove everything USB-devices (drives, hard drives) to avoid file system conflict during installation.
If no methods work, the radical but effective way is Factory Reset, which will delete all your accounts, installed apps, and personalized settings, bringing the TV back out of the box, often eliminating deep system bugs.
To perform the reset, go to Settings → About TV → Reset. The process will take a few minutes, after which the TV will turn on as new. You will need to reconnect your Wi-Fi and log in to your Google account, but this will ensure that software conflicts are resolved.
⚠️ Warning: Resetting to factory settings will delete all data.Make sure you remember passwords from your Google and Netflix accounts, as recovering them without accessing your phone can be difficult.
Hardware malfunctions and payment diagnostics
If the software methods failed, there is a high probability of hardware failure. In Xiaomi TVs, the output of sound is responsible for a specialized chip or module on the main board. When voltage surges or overheating, this component can fail, which is a complete lack of sound when the image is working.
Another possible cause is a malfunction of the plume connecting the main board to the module. Wi-Fi/Bluetooth, In some models, the antenna unit is integrated with the audio track, visual examination of the insides of the TV can reveal swollen capacitors or traces of burns, but only if you have experience, you should open the device.
💡
If after resetting to factory settings, the sound did not appear in any menu (even in the system sounds of the interface), the problem with a probability of 90% is hardware in nature.
It's also worth checking if the TV is overheating. If the case is very hot, the protection system could automatically turn off the sound amplifier to prevent fire. Let the device cool off in an hour and try turning it on again.