One headphone Xiaomi does not work: the reasons and repairs with their own hands

The problem when one headphone Xiaomi stopped working, familiar to many owners of both wired and wireless models – from budget Mi Basic to flagship Xiaomi Buds 4 Pro. The reasons can lie in anything from banal clogging of the speaker to damage to the control board. But before you carry the headset to the service center or buy a new one, it is worth trying to diagnose and fix the malfunction yourself.

In this article, we’ll look at all the possible causes of a broken Xiaomi headphone — from software failures to hardware breakdowns — and give you step-by-step repair instructions. You’ll learn how to check headphones on another device, clean contacts, reset settings. TWS-We will focus on wireless headphones, where the problem is often associated with synchronization or battery discharge of one of the modules.

Important: if your headphones are still warranty, do not disassemble them yourself - this will void warranty obligations, in which case it is better to contact an authorized Xiaomi service center.

Basic diagnostics: check the headphones and the device

Before you take apart a headset or look for a workshop, do a primary check. Often the problem lies not in the headphones themselves, but in the settings of your smartphone, tablet or PC.

• 📱 Connect the headphones to another device. If the second gadget has both headphones working, the problem is the settings of the first one.
• 🔊 Check the sound balance. On Android: go to Settings. → Sound. → Left/right speaker balance. On iOS: Settings → Universal access → Audiovisual content → Stereo balance.
• 🔌 Clean the connector (for wired models) Garbage or oxidation of contacts in the socket 3.5 mm or USB-C may cause a signal to break.
• 🔋 Charging (for) TWS). Put your headphones in your case for 10-15 minutes – perhaps one of them just died.

If you still have a problem after these manipulations, move on to the next step. For wireless headphones Xiaomi also relevant firmware — this will be discussed in a separate section.

2. Problems with wired headphones Xiaomi: cliff, contacts, speaker

Xiaomi wired headphones (such as Mi In-Ear Headphones Pro or Mi Hybrid) are most likely to fail due to:

• 🔗 Wire break (especially at plug or speaker).
• 🎧 Clogging speaker (dust, earwax).
• 🔌 Oxidation of contacts in the connector or on the headphone board.

How to fix:

🔧 Wire break repair

If the wire is worn or broken, it can be soldered or replaced.

1. Determine the place of the cliff by bent the wire in different places (when the cliff is interrupted, the sound will be interrupted).
2. Carefully cut the insulation and find the ragged veins (usually 3-4: left channel, right channel, ground, sometimes microphone).
3. Clean and weld the veins, insulating them with a shrink tube or tape.

Stolen iron (power 25-40 W)|Solder and flux|shrink-tube or seal|Tweezers and a clean-up knife|Multimeter (to check the circuit)-->

⚠️ Warning: If you've never soldered, you should go to a master. Bad soldering can short circuits or make the sound worse.

🧹 Cleaning dynamics and contacts

A clogged speaker or oxidized contacts is a common cause of quiet or no sound in one earpiece.

1. Remove the speaker mesh (neatly tuck it in with a needle or knife).
2. Remove the garbage with a cotton swab dipped in alcohol (do not overdo it - do not press the membrane!).
3. For contacts in a 3.5 mm connector, use an eraser or alcohol.

💡

If you cleaned it up and you had a better sound, but you had a wheezing or a crackling, maybe the speaker membrane is damaged, and then you had to replace it.

3. Xiaomi's wireless headphones (TWS): synchronization, firmware, battery

With Xiaomi wireless headphones (e.g. Redmi AirDots 3 Pro, Xiaomi Buds 4), the situation is more complicated. If one headphone does not work, the reasons may be:

• 🔋 The battery was discharged in one of the headphones.
• 🔄 Synchronization failure between left and right module.
• 📱 Outdated firmware (relevant for models with support for updates).
• 🛠️ Damage to the antenna or board (for example, after falling).

How to restore work:

🔄 Reset and re-synchronization

If the headphones are connected, but the sound is only in one, perform a hard reset:

1. Put both headphones in the case and close the lid.
2. Press and hold the button on the case (usually 10-15 seconds) until the indicator flashes red/white.
3. Take out the headphones and reconnect them via Bluetooth.

For models without a reset button (e.g. Xiaomi Buds) 3T Pro) use a combination of touchpad touches – usually hold both headphones for 10 seconds.

📲 Firmware update

Some Xiaomi models (such as Buds 4 Pro or AirDots 3 Pro) support firmware updates via the Mi Home or Xiaomi Wear app.

1. Connect the headphones to your smartphone.
2. Open the app and go to the headphones section.
3. If an update is available, follow the instructions on the screen.

🔋 Battery problems

If one headphone is quickly discharged or not charged at all:

• Check the contacts in the case - they may have oxidized or contaminated.
• Try charging the case with another cable/charger.
• If the headphone does not turn on even after charging, the battery may have failed (replacement is required).

⚠️ Attention: Batteries in TWS-headphones are not replaceable at home, they are soldered to the board. If the battery is a problem, contact the service.

4. Software glitches: Bluetooth settings, codecs, conflicts

Sometimes the problem isn't with the headphones, but with the device you're connected to.

📱 Resetting Bluetooth settings on your smartphone

If the headphones are connected, but the sound is only in one channel:

1. On Android: Go to Settings → Connected devices → Bluetooth → ⚙️ (setting) → Forget the device.
2. On iOS: Settings → Bluetooth → press the "i" next to the headphones. → Forget this device.
3. Reboot your smartphone and reconnect the headphones.

🎵 Problems with audio codecs

Some Xiaomi smartphones (such as the Redmi Note 12 or the Redmi Note) POCO X5) They use codecs by default. AAC or aptX, which can conflict with headphones, to change codecs:

1. Install the Developer Options app (or activate Developer Mode in the settings).
2. Go to Settings. → System system → Developer mode → Bluetooth settings.
3. Choose. SBC (The most compatible codecs) and reconnect the headphones.

🤖 Conflicts with other devices

If the headphones have previously been connected to another gadget (such as a laptop or tablet), they can automatically switch to it.

• Turn off Bluetooth on all devices except the current one.
• In the headphone settings (if there is an application), turn off Autoconnection.

5. Mechanical damage: falls, moisture, wear and tear

If the headphones fell, got wet, or were in long-term use, the problem could be hardware.

💧 Wetness is coming in.

Even if the model is protected IPX4 (Xiaomi Buds 3 Pro, prolonged exposure to moisture can damage the internal components:

1. Turn off the headphones immediately and take them out of the case.
2. Wet with a napkin the visible moisture.
3. Put in a dry place (such as rice or silica gel) for 24-48 hours.
4. Do not turn it on until it is completely dry!

⚠️ If after drying, the headphones do not work, do not try to disassemble them - the contacts could oxidize inside, and professional cleaning will be required.

🚀 Fall or impact

After mechanical action, check:

• 🔊 Speaker: If the sound became quiet or hoarse, the membrane could be damaged.
• 📡 Bluetooth antenna: if the headphone is not connected or permanently disconnected, the antenna wire may have come off.
• 🔋 Battery: If the headphone is not charging, check the integrity of the battery.

💡

If the headphone doesn't turn on after the fall, but the indicator is on, the problem is most likely the control board. Self-repair is not recommended in this case.

⏳ Natural wear and tear

The life of Xiaomi headphones is about 2-3 years with active use.

• 🔋 The battery loses capacity (earphone quickly discharges).
• 🎧 The speaker wears out (wheezing, distortions appear).
• 🔗 Wires are rubbed (for wired models).

If the headphones have served theirs, it may be cheaper to buy new ones than to repair the old ones.

6. When to contact the service center

Not all breakdowns can be repaired by yourself.

• 🛠️ Headphones for warranties (disassembly cancels it).
• 🔧 Requires chip soldering or battery replacement.
• 📡 Bluetooth antenna or control board damaged.
• 🔊 The speaker emits extraneous noise (squeaking, crackling), which indicates mechanical damage.

Cost of repairs in informal workshops:

⚠️ Note: In official Xiaomi service centers, repairs may cost more, but you will get a warranty for work.Before visiting, check if your model is supported (some budget headphones are considered "unrepairable").

7. Prevention: how to prolong the life of headphones Xiaomi

To avoid problems in the future, follow these tips:

• 🧼 Regularly clean the headphones from earwax and dust (with a cotton swab dipped in alcohol).
• 🔌 Avoid wire bending (for wired models) - store them neatly by twisting them into wide loops.
• 🔋 Do not discharge the headphones "to zero" - charge when the charge drops below 20%.
• 💦 Do not use in wet conditions (even if there is protection). IPX4).
• 📦 Keep it in the case (for the TWS) — This protects against dust and mechanical damage.

Also avoid extreme temperatures – don’t leave your headphones in the sun or in the cold (like in a car in winter) – this shortens battery life and plastic parts.

💡

If you use wireless headphones, wipe the contacts in the case with an alcohol napkin once a month - this will improve charging and prevent oxidation.

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