You listen to music, watch videos, or talk on the phone, and suddenly, the sound in Xiaomi disappears for no apparent reason, POCO Or Mi: today, the sound is fine, and tomorrow it's not in the speakers or the headphones, and whether it's the firmware, the hardware or your settings?
We analyzed more than 500 user complaints on forums. 4PDA, Mi Community and Reddit, they looked at Xiaomi's technical documentation and they interviewed service engineers, and they found that there were at least 12 reasons for the sudden blackout, from the banal to the critical. In this article, we'll take each one apart, learn how to diagnose the problem and recover the sound without going to the service.
Spoiler: 70 percent of the time, it's software, not hardware, but there are exceptions, like oxidation of the speaker's contacts after moisture is injected, which can't be fixed by rebooting. To avoid wasting time, start with simple checks and gradually move on to complex solutions.
1. Software failures: when the sound is turned off due to MIUI
Operating system MIUI It's known for its abundance of functions, but sometimes they conflict:
- 🔄 Mediaserver: occurs after prolonged use or when the processor is overloaded.
- 📱 Application conflict: Some programs (especially those with superadministrator rights) can block sound.
- 🔊 Failure in volume settings: the system “forgets” the current parameters and resets them to zero.
- 📲 Error after update: new versions MIUI Sometimes they contain bugs affecting audio tracks.
How do you check? First, try rebooting your phone, which kills the hanging process. If the sound came back, the problem was temporary. If it wasn't, go to the diagnostics.
Pay special attention to applications with access to microphones and speakers, for example, messengers like Telegram or WhatsApp sometimes “clog” the audio channel after a call, to exclude their influence:
- Close all background applications through Recent → Close everything.
- Check the sound in safe mode (press the power button). → Safe regime).
- If there is sound in safe mode, it is the fault of third-party software.
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V MIUI 14+ There's a hidden audio reset function. To activate it, type in the Phone app code ##36446337## and select Audio Test. → Reset Settings.
2. Sound settings: what you might have missed
Often users will change the settings of the sound without noticing it, and then wonder why it disappeared.
| Setting up | Wherever | How does sound affect you? |
|---|---|---|
| Do Not Disturb mode | Settings → Sound → Do not disturb | Disables all notifications and media sounds, but may work incorrectly. |
| Adaptive sound | Settings → Special opportunities → Adaptive sound | Automatically adjusts the volume, sometimes resetting it to a minimum. |
| Separation of sound streams | Settings → Sound → Additional | Can redirect sound to a non-existent device (e.g., a Bluetooth headset). |
| Energy conservation | Settings → Battery → Energy saving mode | In aggressive modes, it turns off background playback. |
You can check the current settings in 2 minutes:
Turn off the "Do Not Disturb" mode"|Check the volume slider in the notification panel|Turn off Adaptive Sound in special features|Make sure that no non-existent device is connected in Bluetooth settings-->
Notice the bell icon in the status bar, and if it's crossed out, it's silent mode activated. On some models, like the Redmi Note 11 Pro.+) this mode is activated accidentally when you press the volume reduction button to the end.
⚠️ Attention: B MIUI 13 and later, there is a bug in which, after connecting a Bluetooth headset, the sound does not return to the speakers even after the device is turned off. Solution: restart the phone or manually select the output of sound on the speakers in the notification panel.
Problems with speakers: hardware malfunctions
If the software methods did not help, it is time to check the hardware.
- 🔊 Lower speaker (most often fails due to dust and moisture).
- 🎧 3.5 mm connector (if any) – oxidized or contaminated.
- 📶 Antenna switch (affects sound when talking).
- 🔋 Contacts on the motherboard (withdraw from falls).
How to diagnose:
- Call the speakers: call the phone from another device. If the person you're talking to hear is a problem with the top speaker, or if no one's listening, the microphone or audio codec is faulty.
- Check the media: turn on the music. If the sound is only in the headphones, the bottom speaker is not working.
- Inspect the connectors: illuminate the flashlight in the connector 3.5 mm (if any) - there should be no foreign objects or oxidation.
Typical "iron" symptoms:
- 🔇 The sound disappears only at maximum volume - a sign of damage to the speaker.
- 🔊 There is a sound, but with wheezing or distortion - a problem with the membrane of the speaker.
- 📵 The sound disappears after a fall or impact – the plume or contact has left.
How to check the speaker without special tools?
⚠️ Warning: If the phone falls into water (even if it has been months), do not try to disassemble it yourself. oxidation of the contacts can lead to short circuits when trying to repair.
4.Conflicts with Bluetooth and other wireless devices
One of the most common causes of loss of sound is a Bluetooth error, and the system may forget to switch back to the speakers after the headset or speaker is turned off.
- 🎧 The sound is only in the headphones, although they are turned off.
- 🔊 Bluetooth icon in notification panel is on fire, but devices are not in the list of connected devices.
- 📱 The phone thinks it’s connected to the car system (for example, after using Android Auto).
How to fix it:
- Open the Settings. → Connected devices → Bluetooth and remove all stored devices.
- Turn off Bluetooth, restart the phone and turn it on again.
- If the problem persists, reset your network settings: Settings → System system → Resetting settings → Reset Wi-Fi, mobile network and Bluetooth.
In some models (for example, POCO F4 GT Or Xiaomi 12 Pro, there's a bug that duplicates audio streams, and it's going to both the speakers and the Bluetooth device at the same time, which makes it seem like it's not there:
adb shell settings put global bluetooth_a2dp_offload_disabled 1This command needs to be entered through ADB (setup ADB It disables the Bluetooth audio hardware acceleration, which solves the duplication problem.
5. Updates and firmware: when MIUI breaks
After updating MIUI the sound may disappear because of:
- 📦 Incomplete firmware installation (audio drivers files are not copied).
- 🔧 Kernel conflict (new software is not compatible with old audio codec).
- 📝 Resetting sound settings to default values.
How to recover sound after updating:
- Reset the sound settings: Settings → System system → Resetting settings → Resetting the sound settings.
- Clear the cache: Settings → Warehouse → Clear the cache (select System Applications»).
- Reinstall the firmware: download the full firmware package for your model from the Mi Community site and install through Settings → The phone. → Update MIUI → Three points. → Select a firmware file.
If the sound is lost after the downgrade (rollback to an older version) MIUI), The problem may be incompatibility of audio drivers, in which case only a complete flashing through Fastboot with data cleaning will help.
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After updating to MIUI 14 Many Redmi Note users 10 Pros have suffered a loss of sound in their headphones, and it's a driver bug. qti_audio_hal. Solution: back on MIUI 13.0.9 or wait for the patch.
6. The Impact of Root Rights and Custom Firmware
If you have established root rights, custom recavery (for example, TWRP) or alternative firmware (like LineageOS), the sound problem is almost guaranteed to be associated with:
- 🔧 Wrongly patched boot.img (There are no audio drivers).
- 📦 Remote system files (for example, /system/vendor/lib/hw/audio*).
- 🔊 Magisk module conflict (e.g, ViPER4Android or Dolby Atmos).
How to diagnose:
- Load into the recap and check the logs: Advanced → View Log (Look for lines with audio or tinyhal).
- Remove all Magisk modules through Magisk Manager → Modules and reboot.
- Try to temporarily remove root: Magisk Manager → Uninstall → Complete Uninstall.
If the sound is gone after installing Xiaomi.EU or other custom firmware, it most likely does not have a proprietary audio driver for your model.
- Download the vendor image for your model from the official website.
- Fastboot: Fastboot Flash vendor vendor.img
⚠️ Note: On some models (e.g. Xiaomi) 11T Pro, after installing custom recavator, sound is lost in SafeNet applications (banks, payments), due to a violation of the integrity of the keymaster.
External factors: moisture, dust, mechanical damage
Even if your Xiaomi hasn't drowned in the water, moisture and dust can cause the sound to go missing.
| Factor. | Symptoms | Decision |
|---|---|---|
| Moisture intrusion | The sound disappears after rain or high humidity, and you can hear wheezing in the dynamics. | Dry your phone in rice (24)+ You can use silica gel for one hour, and you can use ultrasonic cleaning. |
| Clogging up the dynamics | The sound is quiet, distorted, and you can see the dust in the speaker's lattice. | Clean with a soft brush or compressed air. Do not use sharp objects! |
| Fall or impact | The sound disappeared immediately after the mechanical impact. | Check the plumes and contacts in the service, and the speaker may be replaced. |
| Overheating | The sound is lost when high load (games, charging). | Clean from dust, replace the thermopaste (in the service). |
How to check if the moisture has fallen:
- 🔍 Check the moisture indicator (usually a white or red sticker under the lid) SIM-If it turned red, it was moisture.
- 💧 Light a flashlight into the connectors - there should be no drops or corrosion inside.
If the phone overheats when playing the sound, the problem may be:
- 🔋 Exhausted battery (loads the processor).
- 🔊 Clogged dynamics (amplifier overheats).
- 📱 Background processes (check in Settings) → Battery. → Use of the).
8.When to contact the service: signs of serious breakdowns
If you've tried all the methods, but the sound never came, you may need professional intervention.
- 🔧 The sound disappeared after falling into the water (even if the phone turns on).
- 🔊 The speaker does not make any sounds (even when tested through the engineering menu).
- 📱 The phone does not detect headphones in a 3.5mm connector (if any).
- 🔋 After repairs (such as changing the screen) the sound disappeared or became quieter.
- 🔄 The problem appears periodically for no apparent reason (may be a malfunction of the motherboard).
What to do before visiting the service:
- Make a backup copy of the data (in case of a reset or replacement fee).
- Write down the phone model and version MIUI (is in the settings → The phone).
- If the sound is only lost in certain applications (for example, on YouTube), tell the wizard.
The cost of repair depends on the problem:
- 🔊 Dynamic replacement: 1,500–3,000 ₽ (model-wise).
- 🔧 Oxidation cleansing: 2,000–4,000 ₽.
- 📱 Replacement of audio codec (chip on the board): 5,000–10,000 ₽.
⚠️ Attention: If you are offered to replace the entire motherboard due to a missing sound, this is a reason to doubt the qualifications of the master. 90% of the time the problem is solved by replacing individual components (dynamics, audio codec or plume).