Why One Xiaomi Headphone Works and Another Doesn't: A Complete Diagnostic and Repair Guide

Introduction: why one headphone fails in wireless Xiaomi

Xiaomi wireless headphones are a popular solution for music lovers and active users, but even they are not immune to typical problems. The situation when one headphone works and the other does not, is most common. The causes can be either software failures (incorrect synchronization, firmware errors) or hardware malfunctions (battery discharge, damage to the speaker or contacts).

In this article, we will look at all possible causes, from the banal discharge of the battery to factory defects, and give step-by-step instructions for diagnosis and troubleshooting. Particular attention will be paid to the models of Xiaomi AirDots, Redmi Buds and Xiaomi FlipBuds, because their design has specific features. If you encounter a problem for the first time, do not rush to carry headphones into service: in 80% of cases, you can solve the problem yourself in 10-15 minutes.

Before you start repairing, answer the key question: how exactly does the malfunction manifest? The earphone can be completely silent, wheezing, disconnecting after a few seconds or not connecting to the phone. This depends on the algorithm of actions. For example, if the earphone turns on but does not play sound — a problem in the dynamics or audio track, and if it does not respond to buttons at all — the control board or the battery is to blame.

1. Checking the underlying causes: battery discharge and mechanical damage

Start with the obvious, the charge level. Xiaomi wireless headphones often discharge unevenly, especially if one has been used for longer (like calling).

• 🔋 Place both earbuds in a case for 10 to 15 minutes, then pull out and check the indication. If one doesn't catch fire, the problem is charging contacts or battery.
• 📱 Connect your headphones to your phone and check the charge level in Bluetooth settings (on Android: Settings) → Bluetooth → The gear badge next to the headphones).
• 🔌 Try charging the case from another cable or power supply – sometimes the problem lies in a faulty adapter.

If the headphone is not charged, examine it for mechanical damage:

• 🔍 Check the contacts on the headphone and in the case - they should be clean, without oxidation or contamination (wipe with an alcohol napkin).
• 💧 Avoid moisture: even if the headphones have protection IPX4, Prolonged exposure to sweat or rain can cause corrosion.
• 🚫 Make sure there are no cracks or dents on the earphone – this may indicate damage to internal components.

⚠️ Warning: If the earphone fell from a height or was subjected to severe blows, do not try to disassemble it yourself. In such cases, the flexible plume connecting the speaker to the board is often damaged - its repair requires soldering work.

2. Resetting and reconnecting headphones

If the problem is not the charge, the next step is to reset, which helps in cases where the headphones "forgot" each other or the phone, the instructions are universal for most Xiaomi models:

1. Place both headphones in the case and close the lid for 10 seconds.
2. Pull them out and hold the touchpad (or mechanical button) on the idle earphone for 15-20 seconds until the indicator flashes red and white.
3. Repeat the action for the second headphone (if required).
4. Connect the headphones to the phone again via Bluetooth.

If the reset didn’t help, try forced synchronization:

• 🔄 Turn off Bluetooth on your phone.
• 📱 Remove the headphones from the list of associated devices (Settings) → Bluetooth → Press the "i" next to the headphones. → Delete).
• 🔋 Place the headphones in the case, then pull out and hold the button on the case (if any) for 5 seconds - this will reset the connection between them.
• 🔗 Turn on Bluetooth on your phone and wait until the headphones appear in the list of available devices.

⚠️ Note: On models Xiaomi AirDots Pro 2 and newer reset is performed differently - you need to quickly press the touch panel of the headphone three times, rather than holding it.

Make sure your headphones are over 30%|

Turn off Bluetooth on all devices within a 10 meter radius|

Check that the headphones are not connected to another device (laptop, tablet)|

Use the original charging cable and power supply-->

3. Diagnostics of software failures and firmware updates

Xiaomi’s wireless headphones run on its own firmware, which sometimes fails. If one headphone connects but doesn’t play sound or is unstable, the problem may lie in:

• 🐞 Errors of synchronization between headphones (one is “lagging behind” the other).
• 🔄 Outdated firmware (relevant for models with support) OTA-update).
• 📵 Bluetooth Protocol conflict on your phone (especially on Android 12)+ or iOS 15+).

To check and update the firmware:

1. Install the official Mi Home or Xiaomi Wear app (depending on the headphone model).
2. Connect the headphones to the phone and open the application.
3. Go to the device section and look for firmware update or Check for updates.
4. If an update is available, install it by following the instructions on the screen.

If the app doesn’t see the headphones or the update doesn’t help, try an alternative method:

• 🔌 Connect your headphones to Windows PC via Bluetooth.
• 🖥️ Download the Xiaomi Bluetooth Firmware Updater (available on the forums) 4PDA or XDA-Developers).
• 🔄 Follow the manual firmware instructions (requires experience with such tools!).

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If the headphones stopped working after updating the firmware, perform a full reset (see section 2) and repeat the procedure. Sometimes it helps to roll back to the previous version of the firmware through PC utilities.

4.Discussions with the speaker: how to check and fix

If the earphone is plugged in but it doesn't make a sound (or the sound is distorted), the speaker or audio track is to blame.

• 🔊 Damage to the speaker membrane (wheezing, distortion at high frequencies).
• 🎛️ Breaking wires connecting the speaker to the board.
• 💧 Corrosion of contacts after moisture.
• 🔇 Clogging of the sound channel (dust, earwax).

For diagnosis:

1. Light a flashlight into the sound channel – if dust or foreign particles are visible, gently clean them with a soft brush or compressed air.
2. Connect the headphone to another device (tablet, PC) – if the problem persists, the headphone itself is to blame.
3. Try playing the test sound at different frequencies (e.g., through the Sound Test app on Android), if the wheezing only occurs on bass or high frequencies, the speaker is damaged.

If the speaker is faulty, you have two options:

• 🔧 Self-repair: Replacement of the speaker is possible, but requires care. AliExpress sells repair kits for popular models (for example, speakers for Redmi Buds 3 are priced in the same way). ~300-500 rubles).
• 🏥 Contact the service: if the headphones are guaranteed, repair will cost free. Outside of the guarantee, the cost of replacing the speaker is from 800 to 1500 rubles.

⚠️ Warning: When disassembling Xiaomi headphones, be careful with flexible plumes - they are often attached to glue and easily torn. Use a plastic mediator to carefully separate parts of the case.

5. Bluetooth communication problems: codec, interference, incompatibility

Sometimes the problem isn't with the headphones, but with Bluetooth protocol or phone settings.

• 📶 The earphone is connected, but the sound is interrupted or disappears after a few seconds.
• 🔗 One earphone is turned off when playing music or during a call.
• 🎵 The sound is only in mono mode (e.g., in Zoom or Discord).

Decisions:

1. Change Bluetooth Codec: On Android: Go to Settings → Bluetooth → Settings gear next to the headphones → Audio codec. AAC or SBC instead of aptX (the latter may cause problems on some devices).
2. Turn off power saving functions: On Android: Settings → Battery → Optimizing the battery → Find the Bluetooth app and turn off optimization. On iPhone: Settings → Bluetooth → Information (i) → Turn off "Low power consumption".
3. Check for interference: Turn off other Bluetooth devices within 5 meters (fitness bracelets, smart watches, speakers) and make sure there are no interference sources: microwave ovens, 2.4 GHz Wi-Fi routers, wireless mice.

If the problem only manifests itself in certain apps (like YouTube or Spotify), try:

• 🔄 Reinstall the application.
• 📱 Clear its cache (Settings) → Annexes → Select an application → Warehouse → Clear the cache).
• 🎧 In the application settings, disable functions like “High Quality Audio” or “Sound Normalization".

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Xiaomi headphones often conflict with Bluetooth 5.2 protocol on Samsung and OnePlus phones. If you have one, try rolling back to Bluetooth 5.0 in the developer settings (Settings) → The phone. → Assembly number (7 times) → Developer settings → Bluetooth version).

Hardware malfunctions: board, battery, contacts

If all the software methods have been tried and the earphone still doesn't work, the problem is almost certainly hardware.

To diagnose hardware problems, you will need:

• 🔧 Multimeter (to check battery voltage and contacts).
• 🔍 Loop or microscope (to inspect the board for microcracks).
• 🔥 Soldering station (for repair of breaks or replacement of components).

If you don't have experience in soldering microelectronics, you should contact the service.

• 💰 Replacement of the battery: 500-1000 rubles.
• 💰 Repair of the board (replacement of components): 1000-2500 rubles.
• 💰 Full replacement of the fee: 1500-3000 rubles (depending on the model).

⚠️ Attention: Xiaomi headphones are often assembled on glue, not screws.When disassembling, use plastic tools and a hair dryer (to soften the glue) so as not to damage the body.

7. Warranty case or marriage: what to do

If the headphones are warranty (usually 12 months from the date of purchase), do not try to repair them yourself - this will void the warranty.

1. Find a check or confirmation of purchase (e-check, screenshot from the online store).
2. Contact the official Xiaomi service center or the seller (if you bought in the brand store).
3. Describe the problem in as much detail as possible: when it appeared, under what circumstances, what actions you have already taken.

Signs of factory marriage, which are subject to the guarantee:

• 🔋 The headphone did not hold a charge from the first day (discharged in 1-2 hours).
• 🔊 The speaker emitted wheezing or distortions "out of the box".
• 📵 The headphone has not connected to the phone since purchase.
• 💧 The body got moisture during the warranty period (if the model has protection). IPX4+).

If the warranty has ended, but the headphones broke due to the manufacturer’s fault (for example, the button fell off or the case cracked without external influence), you can try:

• 📧 Write in support of Xiaomi through the official website or the Mi Community app.
• 🗣️ Leave a complaint on the site where the goods were purchased (for example, on Wildberries or Ozon - sometimes sellers go to meet the requirements of the buyer).
• 🔄 Learn about the possibility of exchange under the loyalty program (for example, Xiaomi stores sometimes offer a discount on a new model when passing the old one).

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In Russia, the official warranty on Xiaomi headphones is valid only when buying in authorized stores (the list is available on the website). mi.com/ru). If you bought on AliExpress or from unofficial sellers, warranty repairs are not provided.

FAQ: Frequent questions about Xiaomi headphones that don't work