Why the sound on the Xiaomi phone disappeared: full diagnostics and repair

Did you play your favorite track, but the Xiaomi speakers are silent? Or can the person in the phone not hear your voice, even though the microphone is working, POCO Mis or Mis are common, but 80 percent of them can be fixed by themselves without a service center. In this article, we'll look at all the possible causes of the lack of sound, from trivial settings to hidden hardware malfunctions, and we'll give checklists for diagnostics and step-by-step instructions.

It is important to understand: the sound system of a smartphone consists of several components – speakers (bottom, conversational, stereo), microphones, audio chip, 3.5 mm connector (if any), Bluetooth module and software drivers. For example, on Xiaomi models 12T Redmi Note 11 often fails contact group speaker after falling, and POCO F4 — tuning MIUI post-refresh.

Before carrying your phone for repair, walk through our guide: we have collected solutions for all versions. MIUI (including MIUI 14 and HyperOS), and also took into account the features of popular models - from the budget Redmi A2 to the flagships Xiaomi 14 Ultra.

1. Software failures: when there is sound but it is not heard

In 60 percent of cases, the problem is not hardware, but misaligned settings or software conflicts, and let's start with the simplest one: checking the basic parameters.

The first thing you need to do is make sure that the sound is not turned off at the system level. MIUI There are two volume adjustments: Multimedia Volume (for music, video) and Call Volume. Sometimes users accidentally lower one of the sliders to zero, causing the sound to disappear in specific applications.

• 🔊 Check the physical buttons: press the volume button, and you're going to see a scale with an active speaker on the screen. If the scale is gray, the sound is off.
• 📱 Do Not Disturb Mode: Swipe down from the top of the screen and make sure the bell icon is not crossed out. POCO X5 Redmi can block all notifications, including sounds.
• 🎵 App audio settings: Open YouTube or Spotify – it’s possible that the sound is turned off inside the app itself (for example, after connecting headphones).
• 🔄 Reboot: Press the power button and select Reboot.This will reset the temporary error of the audio drivers (relevant to Xiaomi 13 Lite after the updates).

If you don't get the sound after this manipulation, you can go to a deeper diagnostics, and on HyperOS models (like Xiaomi 14), it sometimes helps to reset the sound settings to factory ones.

1. Open the Settings. → Sound and vibration.
2. Slip on the three dots in the upper right corner and select Reset Settings.
3. Confirm the action and restart the phone.

⚠️ Attention: On some firmware (MIUI 12.5 and below) resetting the audio settings can bring back the factory melody of the call and notifications. Save your ringtones in advance if they're custom-made.

2. Conflicts after the update: why the sound disappears MIUI

Updates MIUI And HyperOS often brings not only new features, but also bugs. MIUI 14.0.4 Many Redmi Note 11 Pro users complained about missing audio in speakers. WCD9385, which is used in most Xiaomi smartphones on Snapdragon processors.

How to fix it:

• 🔙 Update rollback: If the sound is gone immediately after the update, try returning to the previous firmware version via Fastboot (instruction below).
• 🛠️ Cache Cleanup: Go to Settings → Annexes → Application management → Three points. → Show them system. Find Media and Audio, clear the cache and the data.
• 📦 Removing Google Play Updates: Sometimes it's Google Play Services' fault. → Annexes → Google Play Services → Three points. → Remove updates.

For advanced users: if you are confident in your actions, you can manually flash the audio mod through TWRP. For example, for POCO F3 There is a patch Audio Mod by Ivan_Meler, It fixes the sound problems after the updates, and you can download it on the XDA-Developers forum.

3. Hardware malfunctions: when the "iron" is to blame

If the software methods didn't work, the problem is probably the hardware, and let's look at the typical hardware breakdowns and their signs.

Symptoms of hardware malfunctions:

• 🔇 Complete lack of sound in all modes (dynamics, headphones, Bluetooth).
• 🎧 The sound is only in headphones, not in speakers (or vice versa).
• 🔊 Crackling, wheezing or distortions during reproduction.
• 📱 The phone does not detect the connected headphones (even if they are running on another device).

What could have broken:

1. Speakers: the most vulnerable part. On Redmi Note models 8/9 The bottom speaker's contact often leaves after a fall. 11 — burnout.
2. Audio chip: It's responsible for processing sound, and when it fails, the sound disappears completely, even in the headphones. POCO F1 posthumidity.
3. Connector. 3.5 mm/Type-C: oxidation of contacts or mechanical damage. 9C The connector often breaks after careless removal of headphones.
4. Microphone: If the person you're talking to can't hear you, but you can hear them, it's the microphone that's to blame. On the Xiaomi 12 Lite, the bottom microphone is often clogged with dust.

For diagnosis, use the test of hardware components:

1. Type on the keyboard ##4636##.
2. Select "Equipment Testing» → «Audio».
3. Check all speakers and microphones in turn.

⚠️ Warning: If the test shows that the speaker or microphone is not responding and software methods are not helping, do not try to disassemble the phone yourself. IP-certification (for example, Xiaomi 13 Pro) disassembly without special tools can damage waterproof gaskets.

Try connecting a Bluetooth column

Start the test equipment code ##4636##

Light the flashlight in the connector 3.5 mm/Type-C — Are there any foreign objects?

Check if there have been any falls or moisture infestations.-->

4. 3.5mm and Type-C connector problems: why the phone doesn't "see" headphones

Many Xiaomi users are faced with a situation where the phone no longer recognizes the connected headphones, the reasons can be different, from banal pollution to the failure of the audio port controller.

Frequent scenarios:

• 🎧 The headphones are connected, but the sound is going through the speakers, and it's the fault of a broken plug or oxidized contacts in the connector.
• 🔌 The phone says, "Hearphones connected," but there's no sound. Maybe the cable is damaged or the audio chip is defective.
• 🔄 Sound comes and goes, typical of the Redmi Note 10 with a worn Type-C connector.

How to fix:

1. Clean connector: use wood toothpicks (not metal!) and alcohol to remove dust. POCO M3 often accumulates dirt at the bottom of the connector.
2. Check the headphones: plug them into another device, and if there's no sound, the problem is the headphones.
3. Resetting connector settings: some firmware helps reset through the engineering menu.
4. Replacement of adapter (for Type-C): If you use a 3.5mm headphone adapter, try another one. 11T Cheap Chinese adapters are often broken.

On models without a 3.5 mm connector (for example, Xiaomi) 12S Ultra) Sound problems through Type-C may be related to damage USB-C In this case, only the replacement of the connector in the service center will help.

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If the headphones are defined, but the sound is distorted, try to turn on the option “Disable absolute volume” in the developer settings (Settings) → The phone. → Version. MIUI — Tap 7 times, then return to the additional → For developers).

5 Bluetooth problems: There is sound, but not through wireless devices

If the sound is only lost when connected via Bluetooth (columns, headphones, car radio), the problem lies in the wireless module or its settings.

• 🔄 Profile conflict: The phone may “forget” that the connected device supports sound transmission (e.g., after an update) MIUI).
• 📡 Bluetooth module failure: especially relevant for Redmi Note 9 Pro with Broadcom chip BCM4359.
• 🔋 Saving energy: MIUI Sometimes switches off Bluetooth to save power.

Decisions:

1. Reconnect the device: Forget the device in the Bluetooth settings. Turn off Bluetooth for 30 seconds. Turn it back on and reconnect the device.
2. Reset Bluetooth Settings: Go to Settings → Connections → Bluetooth → Settings (cogs) → Reset the settings.
3. Turn off battery optimization: for this, go to Settings → Annexes → Application management → Three points. → Special access → Battery optimization. Find Bluetooth and turn off optimization.
4. Update your Bluetooth firmware: Some models (e.g. Xiaomi 13) can update drivers via Settings → The phone. → Updating the system → Three points. → Package updates.

If nothing works, try connecting another Bluetooth device. If there's no sound, it's the phone's Bluetooth module. POCO X3 NFC Its replacement costs 1,500-2,500 rubles.

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On HyperOS models (such as Xiaomi 14) before resetting Bluetooth, try turning on developer mode and disable the option"AVRCP 1.6" - This often solves problems with connecting to car systems.

Moisture and mechanical damage: what to do after a fall or flood

Moisture or impact are two of the most common causes of hardware failures, and even if the phone hasn’t sunk, high humidity (such as in the bathroom) can cause contacts to corrosion.

Signs of moisture intrusion:

• 💧 Moisture indicator (red mark) inside the slot for SIM-Type-C cards or connectors.
• 🔊 The sound only appears after heating the phone (for example, a hairdryer).
• 📉 The phone spontaneously reboots when playing sound.

What to do:

1. Turn off the phone immediately and remove it. SIM-map + Do not turn it on for at least 24 hours!
2. Please dry: Put your phone in a silica gel bag (in shoe boxes). Use a fan at minimum speed (not a hair dryer!). Don't put it in rice -- it's a myth, rice particles can get in.

Check after drying:

Xiaomi

Redmi Note 11S

After the fall, check:

• 📱 Integrity of the body – cracks near speakers or microphones.
• 🔊 Sound when pressing the case - if at pressure on the lower part of the phone sound appears, the contact speaker leaves.
• 🛠️ Vibrator performance – if it also does not work, damage to the motherboard is possible.

⚠️ Note: On models with a glass back panel (for example, Xiaomi 12) after a fall, not only the case, but also the board under the speaker can crack. Self-repair in this case is impossible - you need to replace the entire module.

7.Castom firmware and root: why sound goes missing after system hack

If you installed custom firmware (LineageOS, Pixel Experience), obtained root rights or modified system files, the sound problem may arise from:

• 📁 Removal of system audio libraries (e.g. libaudiohal.so).
• 🔧 Incompatibility of firmware with iron (for example, firmware for POCO X3 on the Redmi Note 9S).
• 🛠️ Incorrect access rights to files /system/etc/audio_*.

How to recover the sound:

1. Check the error log: connect the phone to the PC and enter into ADB: adb logcat | grep audio Look for lines from E/AudioFlinger or E/AudioPolicyManager — They will point to the problem component.
2. Re-flash the original MIUI: Download the official firmware for your model from en.miui.com and run through Fastboot.
3. Restoring Access Rights: If you have root, execute in Terminal: su chmod 644 /system/etc/audio_* chown root:root /system/etc/audio_*
4. Install audio mode: some models have patches that correct the sound on custom firmware. POCO F2 Pro is a good fit for Audio Mod by wzsx150.

If you are not sure about your actions, it is better to return the phone to factory state through the Mi Flash Tool. on models with a locked bootloader (for example, Xiaomi). 13T) This will require you to unlock Bootloader through the official Xiaomi website.

FAQ: Frequent questions about Xiaomi sound