Why Xiaomi’s Headphone Doesn’t Work: Full Diagnostics and Repairs

You pulled Xiaomi AirDots, Redmi Buds or Mi True Wireless out of your case, but the only sound you can hear is a familiar situation? One in five owners of the brand's wireless headphones have this problem, and the causes can be either a simple connection error or a serious hardware malfunction. In this article, we'll look at all the possible scenarios for why one Xiaomi headphone stopped working, from software failures to physical damage, and give step-by-step instructions for fixing each one.

Xiaomi wireless headphones often suffer from “out-of-synchronization” between themselves or with the phone due to the specifics of the Bluetooth Low Energy (BLE) protocol. For example, the AirDots Pro 2 and Buds 3 Pro models can “forget” the paired headphone after updating the firmware or battery discharge below 5%, while both headphones look good on the outside: the indicators are on, the system is determined, but the sound is played in only one. In 70% of cases, the problem is solved by reset, but sometimes a deeper diagnosis is required.

Before you bring your headphones to the service center, go through our checklist. We've compiled current methods for 2020-2026 models, including the rare cases where it's not the earphone itself that's the fault, but the smartphone or even the Bluetooth stacks in MIUI firmware. And if you've tried everything, at the end of the article there's a section on warranty repair and the cost of replacing components.

1. Checking basic settings: what to do first

Start with the obvious: maybe the problem isn't with the headphones, but with the settings of your device. Most often, one Xiaomi earphone doesn't work because of:

• 🔊 Monosound in the settings of the smartphone (for example, the “Monosound” mode for the hearing impaired is enabled).
• 📱 Bluetooth connection errors when the phone only sees one headphone.
• 🔋 A discharged battery in one of the headphones (even if the indicator is on).

The first thing to do is:

1. Open Settings → Special features on your smartphone and make sure that the Mono Audio option is turned off.
2. Go to Bluetooth Settings, find your Xiaomi headphones in the list of connected devices, and click “Forget this device” (Unpair).
3. Check the charge level of each earphone through the Mi Earphones app (for models with support). If one earphone shows 0%, set it to charge separately from the case for 10-15 minutes.

If the sound doesn't appear after this manipulation, move on to the next step. Importantly, some models (e.g. Redmi Buds 4 Active) can "hang" in standby mode if they are not used for more than 3 days, in which case only a complete reset will help.

2. Resetting headphones to factory settings

The most effective way to get back up is hard reset, which cleans the memory of the headphones, resets the connection settings, and often solves the problem of a "single silent earphone."

If the reset didn’t help, try an alternative method:

Put both headphones in the case and close the lid.|

Make sure the case is charged (the indicator is green)|

Turn off headphones from all devices in Bluetooth | settings

Press the reset button (see table above) and wait for the indicators to flash |

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Warning: After reset, the headphones may lose communication with the Mi Earphones app. To restore functionality (such as an equalizer or firmware), you will have to reinstall the application and reconnect the device.

3.Chronicity problems between headphones

Xiaomi's wireless headphones work on the Master-Slave principle: one headphone (usually the right one) is the master and the second is the slave one. If the communication between them is broken, the sound may disappear in one of the headphones.

• 🔄 Firmware failure after update (especially relevant for Buds 3 Pro and AirDots 3 Pro).
• 📶 Bluetooth interference from other devices (e.g., router at 2.4 GHz).
• 🔋 Different charge levels in headphones (if one is discharged more strongly, it can turn off).

How to restore synchronization:

1. Put both headphones in the case and close the lid for 30 seconds.
2. Pull them out and wait until the indicators start flashing in sync (usually white or blue).
3. If the blinking is not synchronous (for example, one burns red, the other is white), reset (see section 2).
4. Connect the headphones to your phone via Bluetooth Settings and check the sound.

For models that support Mi Earphones (such as Mi True Wireless 2):

1. Open the application and go to Settings → Connection reset.
2. Follow the instructions on the screen to re-synchronize.

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If the headphones connect to the phone, but only one sound comes, try turning on Game Sound mode in the Bluetooth settings. Sometimes this force activates the stereo mode.

4. Hardware malfunctions: when parts need to be replaced

If the software methods didn't help, the problem could be a physical breakdown.Typical hardware malfunctions of Xiaomi headphones:

• 🔊 Damage to the speaker (for example, after falling or getting moisture).
• 🔋 Bloating or battery failure (earphone does not charge or shuts down after 5 minutes).
• 📡 Bluetooth antenna break (earphone not determined by case or phone).
• 💧 Oxidation of contacts due to sweat or rain (a common problem with Redmi Buds 3 Lite).

Critical sign of hardware failure: the headphone is not detected by the case when charging (the indicator does not burn), but it can flash when trying to connect to the phone, in which case an autopsy and diagnosis are required.

Self-repair is possible if you are confident in your skills, for example, replacing the speaker in AirDots 2 will cost 300-500 rubles, and the battery will cost 200-400 rubles. However, for models with waterproofing (for example, Buds 4 Pro), it is better to contact the service: after opening, leakage is lost.

Note: if headphones are warranty, do not open them yourself! Xiaomi will refuse free repairs if there is a trace of interference. The warranty period for headphones is usually 12 months (for models with waterproof – 6 months for moisture protection).

5. Problems with the smartphone or software

Sometimes it's not the earbud itself that's to blame, but the device it's connected to.

• 📱 Bluetooth stack failure in firmware MIUI (especially after updating).
• 🔄 Conflict with other Bluetooth devices (e.g., smartwatches or speakers).
• 🛠️ Mi Earphones errors (for example, after resetting your settings).

How to check:

1. Connect your headphones to another device (like a tablet or PC), and if both headphones work, your smartphone is a problem.

For owners of smartphones Xiaomi/Redmi/Poco:

• 🔧 Turn off the dual Bluetooth connection function in Settings → Bluetooth → Additionally.
• 🔄 Enable Developer Mode and activate Bluetooth Debugging option (Settings) → The phone. → Version. MIUI — Press 7 times, then return to the Additional Settings → For developers).

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If the headphones work with other devices but not with a smartphone, the problem is with the firmware or settings of the phone. Try rolling back the MIUI update or resetting the network settings.

6. Effect of moisture and mechanical damage

Even if your headphones are IPX4 or IP54 certified (like the Redmi Buds 4 Pro), it doesn't guarantee 100% moisture protection.

• 💧 Short circuit on the headphone board.
• 🔋 Oxidation of charging contacts or dynamics.
• 🔊 Distortion of sound or complete disconnection of one headphone.

Signs of moisture intrusion:

• The headphone stops charging or quickly discharges.
• The sound becomes quieter or wheezing appears.
• The indicator flashes unstablely (for example, red instead of white).

What to do:

1. Turn off the earphone immediately and put it in a dry place (such as rice or silica gel for 24-48 hours).
2. Do not try to charge the earphone until it is dry!
3. If after drying the problem remains, disassemble the headphone and clean the board with an alcohol solution (90%+).

Note: if Xiaomi headphones have waterproofing, disassembly will invalidate it. For models with IPX4/IP54 after repair, you will need sealing (for example, silicone sealant).

7. Warranty repair and contacting the service center

If you’ve exhausted all the options, but one Xiaomi headphone still doesn’t work, it’s time to contact the service.

• 📄 The warranty card must be kept (electronic or paper).
• 🔧 Xiaomi service centers are available in most major cities (list on the website) mi.com/ru/service/center).
• ⏳ Repair period – from 5 to 14 days (depending on the malfunction).

What the warranty covers:

• 🔋 Battery defects (if the headphone does not hold the charge).
• 🔊 Failure of the speaker or microphone.
• 📡 Problems with Bluetooth module (if the headphone is not connected).

What the warranty does not cover:

• 💧 Damage from moisture (even if the model is waterproof).
• 🔨 Traces of autopsy or self-repair.
• 🚀 Mechanical damage (cracks, dents).

Cost of repair without warranty:

• Diagnosis - 300-500 ₽.
• Replacement of the speaker - 800-1500 ₽.
• Replacement of fees - 1500-2500 ₽ (Sometimes it’s cheaper to buy new headphones).

Before going to the service:

1. Reset your headphones (Section 2).
2. Prepare a check or confirmation of purchase (even electronic).
3. Make sure that the headphones do not have traces of moisture or mechanical damage.

FAQ: Frequent questions about Xiaomi's broken headphone