One Xiaomi headphone does not work: full instructions for diagnosis and repair

You pulled out your favorite Xiaomi headphones to enjoy music, but you found one that didn't turn on or make a sound? This problem is familiar to many owners of both wireless models (AirDots, Redmi Buds, FlipBuds) and wired ones (Mi Basic, Hybrid). Causes can range from simple battery discharge to serious hardware malfunctions. In this article, we'll look at all possible scenarios why one earbud is silent, and give step-by-step troubleshooting instructions, from simple actions to deep diagnostics.

It’s important to understand that if the headphone doesn’t respond fully to charging, buttons, or touches, the repair algorithm will be different from when it turns on but doesn’t play sound. We’ll look at both options, and we’ll also look at the typical user errors that lead to breakdowns. For convenience, the FAQ answers to frequent questions and a table of repair methods compatibility with popular Xiaomi models are provided at the end of the article.

1. Diagnostics of the problem: why does not work one earphone

Before you start repairing, you need to determine exactly what is wrong with the earpiece, and here are the key symptoms and their possible causes:

• 🔋 The headphone does not turn on at all (no indication, does not respond to buttons) → battery discharged, cable damaged (for wired), charging case contacts oxidized.
• 🔊 The earphone is on, but there's no sound. → synchronization failure (for TWS), Pollution dynamics, software failure.
• 🔄 The earphone is working and it's shutting down. → unstable Bluetooth connection, damaged plume (for wired), battery wear.
• 🚨 The earpiece makes wheezing or distorted sound → Membrane damage speaker, moisture ingress, Equalizer failure.

For wireless models (AirDots, Buds), check the charging case first: often the problem lies in poor contact between the headphone and the charging nests. On wired headphones (Mi Basic, Piston) check the 3.5 mm connector for contamination or wire breaks at the base.

Basic checks: what to do first

In 60 percent of cases, the problem is solved without the earbuds being disassembled.

1. Reset the headphones: For wireless models, put both earphones in a case, close the lid for 10 seconds, then pull out and try to reconnect. For wired ones, disconnect from the device and plug in again.
2. Check the sound balance: On Android: Settings → Sound → Sound Balance (L/R). On iPhone: Settings → Universal Access → Audiovisual → Stereo Balance. It's possible that the sound has been accidentally shifted to one channel.
3. Clear the contacts: For TWS-Wipe the metal contacts in the case and on the headphones with a cotton swab dipped in alcohol. For wired ones, check the 3.5 mm oxidation connector (clean with a lastic).
4. Reset Bluetooth settings: On the phone: Settings → Bluetooth → ⚙️ headphone-on → Remove the device. Then re-pair.

If you've done this, the earphone has been running, it's a software problem, and if you haven't, move on to the next section.

3. Charging problems: The earphone is not turned on because of the battery

One of the most common scenarios is battery failure or charging failure, especially in Xiaomi’s wireless models, where one earbud can run out faster than another.

• 🔋 Check the charging indication: put the headphone in the case and see if it lights up red/orange LED. If not, the problem is in the contacts or battery.
• ⚡ Use another cable/power supply: sometimes the case does not charge due to weak current (need an adapter) ≥1A).
• 🔄 Try "forced" charging: keep the headphone in the case for 1-2 hours, even if the indication does not burn".

Critical point: if the headphone Xiaomi AirDots Pro 2 or Redmi Buds 3 is not charged for more than a day, most likely, the battery or power controller has failed, you will need a replacement.

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If the Xiaomi case does not charge headphones, try connecting it to the PC through USB-cable and check if it is defined as a storage device (sometimes a sign of a controller malfunction).

Resetting and flashing: software repair methods

If the headphone is on but not connecting to the phone or playing sound, the problem may be in the firmware. For models with Mi Home support (AirDots Pro, Buds 3 Pro), follow the following steps:

1. Reset to factory settings: For most TWS-Xiaomi headphone reset is performed as follows: Hold both touch panels for 15 seconds (until the flashing of red and white colors).
2. Firmware Update: Install the Mi Home app, connect your headphones and check for updates in the Device Profile → Firmware Update section.
3. Manual flashing (for advanced): For models on a Qualcomm QCC3020 chip (like Redmi Buds 3), you can flash custom firmware through the QFlash Tool, but it’s risky!

Attention! The continuous blinking of the white LED after reset indicates a hardware failure (a Bluetooth module or memory is damaged), in which case software methods will not help.

5. Repair of wired headphones: soldering and replacement of the connector

For wired models (Xiaomi Mi Basic, Hybrid, Piston), 90% of the problems are related to a wire break or a 3.5 mm connector malfunction.

• 🔍 Break diagnosing: connect your headphones to your phone and bend the wire at the base of the connector/speakers. If the sound appears/disappears, there's a break.
• 🛠️ Connector repair: Cut the connector 1-2 cm above the cliff. Clean the wires (usually 3-4 veins: left channel, right channel, earth, sometimes microphone.
• 🧲 Speaker replacement: If the sound is wheezing or missing from one earbud, the membrane may have been damaged.Speakers for Xiaomi can be found on AliExpress (search by model).