Why Xiaomi’s One Headphone Doesn’t Work: A Complete Diagnostic and Repair Guide

Introduction: why stopped working one headphone in wireless Xiaomi

You got Xiaomi Redmi Buds, Mi True Wireless or another model out of the case, but only one of them makes sound? TWS-In 70% of cases, the malfunction is due to software failures or improper synchronization, but sometimes hardware failures are to blame, from oxidized contacts to damaged speaker.

In this article, we’ll look at all the possible reasons why one Xiaomi earphone is silent or out of order, from a simple battery discharge to a factory defect, you’ll get step-by-step diagnostic instructions, checklists to check and tips on how to avoid repeat breakdowns, and if the headphone has already “dead” completely, we’ll tell you whether it’s worth repairing or easier to buy new ones.

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1. Checking for underlying causes: battery, connection, dirt

Before you disassemble your headphones or reset your settings, eliminate obvious problems. In 30% of cases, one Xiaomi earphone does not work because of:

• 🔋 Battery discharge (especially if the headphone was lying outside the case for a long time).
• 🎧 Incorrect position in the case (contacts do not come into contact with charging areas).
• 🧹 Contamination of the speaker or microphone (dust, earwax, moisture).
• 📱 Failure to connect to the phone (earphone is connected, but the sound goes only to one channel).

Start with the simplest diagnosis:

1. Put both earbuds in the case for 10-15 minutes, make sure the indicators on the case flash (meaning charging).
2. Take out your headphones and check if the light is on the silent earphone, and if not, the contact or battery problem.
3. Connect the headphones to the phone and go to Settings → Bluetooth. Make sure both earbuds are connected (e.g. Redmi Buds) 3 Lite_L and Redmi Buds. 3 Lite_R).
4. Try playing the sound on another device (tablet, laptop). If the problem remains, it's the headphones, if it disappears, it's the phone settings.

If after this manipulation, the earphone is still not working, move to the next section.

Call the contacts with a multimeter (if you have skills)

Try to connect the headphone separately (not in pairs)

Clean the speaker with a soft brush or cotton swab

Update the firmware of headphones (if available for the model)-->

2. Software failures: reset, reconnect, firmware

A common reason for the silence of one earpiece is the synchronization failure between the left and right modules.

• 📱 Updates to the phone firmware (especially on the MIUI 13/14).
• 🔄 Disconnect Bluetooth during operation.
• 🔋 Complete discharge of one of the headphones.

So, you can reset your headphones, and the instructions vary depending on the model.

Method 1: Reset via a button on the case (for most models)

1. Put both headphones in the case and close the lid.
2. Press and hold the button on the case for 10-15 seconds until the indicator flashes red and white.
3. Open the lid, take out the headphones and connect them again to the phone.

Method 2: Reset via sensor (for Redmi Buds) 4/5, Mi True Wireless 3)

1. Get the headphones out of the case.
2. Touch and hold the touchpad on both headphones simultaneously for 10 seconds.
3. Wait for a double beep (or flashing lights).

If the reset didn't help, try forced reconnection:

1. Forget the device in your phone's Bluetooth settings (Settings) → Bluetooth → ⚙️ headphone-name → Forget the device).
2. Turn off Bluetooth on your phone, restart it.
3. Turn on Bluetooth, take the headphones out of the case and plug them back in.

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If the headphones are connected, but the sound is only in one, check the audio balance in the phone settings: → Special facilities → Mono-audio balance. Sometimes a failure resets the setting 100% to one channel.

Method 3: Update firmware (for supported models)

Some Xiaomi models (e.g. Mi True Wireless 2, Redmi Buds 3 Pro) support firmware updates via the Mi Home app or Xiaomi Wear.

1. Put the headphones on the phone.
2. Open the Mi Home app (or Xiaomi Wear for new models).
3. Find the headphones in the list of devices and check the section "Firmware Update".

3. Hardware breakdowns: contacts, speaker, battery

If the software methods didn't work, the problem is probably hardware, so let's look at the typical malfunctions and how to diagnose them.

Problem 1: Oxidized or contaminated contacts

Contacts on the headphones and inside the case eventually become oxidized or contaminated, which leads to poor charging and, as a result, the failure of one of the headphones.

• 🔍 Look at the contacts on the earphone and in the case, and if they're darkened or covered with plaque, they need to be cleaned.
• 📏 Check if your contacts are bent (especially after falls).

Use:

• Cotton swab dipped in isopropyl alcohol (at least 90%).
• Lastic (greatly rub the contacts to remove oxides).
• Tooth cleaning (to clean hard-to-reach places).

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Never use acetone, vodka or wet wipes to clean your contacts! this can damage the coating and aggravate corrosion.

Problem 2: A damaged speaker

If the earphone turns on, plugs in, but there's no sound, maybe the speaker is damaged.

• 💥 Mechanical damage (impact, fall).
• 🌊 Getting moisture (even if the headphones have protection) IPX4/IPX5, prolonged exposure to water is harmful).
• 🔊 Volume overload (for example, if you listen to music at maximum for a long time).

You can check the speaker as follows:

1. Connect the headphone to your phone and call another number. If you hear a bell in the headphone but you don't have music, the problem is the firmware or the uniformity settings.
2. Put a flashlight on the speaker's grille, and if the membrane is torn or deformed, the speaker needs to be replaced.

Problem 3: Bloated or saturated battery

Lithium polymer batteries in TWS-Headphones last 2-3 years, after which they quickly discharge or even fail:

• 🔋 The headphone discharges in 10-20 minutes.
• 🔌 Not charged in the case (indicator not burning).
• 🔥 Case or earphone is heated when charging.

If the battery is swollen (as you can see from the deformation of the case), you can't keep using the headphone - it's dangerous! The bloated battery can only be replaced at the service center.

4. Bluetooth problems: codec, interference, compatibility

Sometimes one Xiaomi headphone doesn't work because of Bluetooth connection issues.

• 📶 Interference from other devices (Wi-Fi routers, microwaves, wireless mice).
• 🔄 Codec incompatibility (e.g., phone supports only codecs) SBC, And the headphones are trying to use. AAC or).
• 📱 Failure in phone's Bluetooth drivers (especially after update) MIUI).

How to diagnose and correct:

Step 1: Checking codecs

On Xiaomi phones, you can forcibly choose a Bluetooth codec:

1. Put the headphones on.
2. Open Settings → Bluetooth.
3. Press on. ⚙️ headphone-name.
4. Select Sound Settings → Bluetooth codec.
5. Try it one by one. SBC, AAC and aptX (if available).

Step 2: Elimination of interference

If the sound is interrupted or one earphone is periodically switched off:

• Disable other Bluetooth devices (fitness bracelets, keyboards).
• Move closer to the phone (maximum distance for stable operation is 10 meters without obstacles).
• Turn off Wi-Fi on your phone (sometimes 2.4GHz channels conflict with Bluetooth).

Step 3: Reset Bluetooth settings on your phone

If the headphones are connected with errors, reset your Bluetooth settings:

1. Go to Settings → System and device → Reset settings.
2. Select Network Settings Reset (this will remove all stored Wi-Fi and Bluetooth devices).
3. Reboot your phone and reconnect your headphones.

1. Open the Phone app and dial ##4636##.

2. Select "Phone Information."

3. Scroll down and turn on the option to Improve Bluetooth Sound Quality (A2DP)».-->

5. Disassembly and repair of Xiaomi headphones with their own hands

If all the previous methods didn't work, there are two options: bring the headphones to the service or try to fix it yourself. TWS-Headphones are jewelry work that requires patience and tools. Without experience, you risk breaking your gadget completely, so weigh the pros and cons.

What you need to do to disassemble:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat-footed 1.5 mm).
• 🧲 Tweezers and suckers (for gently lifting the cover).
• 🔥 Dryer or soldering iron (if you need to replace the plume / contacts).
• 📸 Loop or magnifying glass (contacts and details are very small).

Step-by-step disassembly instructions (on the example of Redmi AirDots)

1. Removal of the back cover: Carefully tuck the cover with a flat screwdriver or mediator. Start at the junction of the plastic (usually there is a small gap).
2. Battery plume disconnect: Under the lid, you will see the battery soldered to the board. Unplug the plume (don't pull the wires!).
3. Diagnostics of the board: Check for oxidation, breakage or burnt elements. Pay attention to the charging contacts and Bluetooth antenna.
4. Speaker check: Gently disconnect the speaker and check the membrane integrity. If it's torn, you need a replacement.

Typical breakdowns during dismantling and how to avoid them

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Independent repair of headphones Xiaomi is justified only if their cost exceeds 3-4 thousand rubles For budget models (for example, Redmi Buds 2 for 1.5 thousand rubles) cheaper to buy new than spend on spare parts and tools.

6. When to contact the service: warranty, repair cost, alternatives

If you're not ready to take your headphones apart on your own, or if your diagnosis shows a serious breakdown (like a burnt-out board), you should think about a service center.

Verification of the guarantee

Xiaomi gives a guarantee on the TWS-Headphones from 6 to 12 months (depending on model and region:

• 📄 Headphones should not have traces of autopsy or mechanical damage.
• 💧 The failure must not be caused by moisture (unless the model has no protection). IPX4+).
• 📦 The package must include a check, a warranty card and original packaging.

How to check the guarantee:

1. Find the serial number on the case or in the documents.
2. Check it out on Xiaomi’s official website in the “Guaranty Check” section.
3. If the headphones are purchased in Russia, contact authorized service centers (the list is available on the website). mi.com/ru).

Cost of repairs in the service

Prices for repair of headphones Xiaomi in 2026:

Note that if the headphones are older than 2 years, the repair can cost 70-80% of the cost of new ones, in which case it is more appropriate to consider buying a replacement.

Alternatives to repair: what to buy instead of broken headphones

If the repair is not feasible, here are some good budget alternatives:

• 💰 Budget up to 2,000 ₽: Redmi Buds 4 Lite (good sound, 20 hours of battery life).
• 💵 Budget 2,000-4,000 ₽: Xiaomi Buds 4 Pro (ANC, LDAC, defence IP54).
• 💎 Premium: Xiaomi FlipBuds Pro (hybrid) ANC, 28 hours of work).

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Before buying new headphones, check them for compatibility with your phone.For example, Mi True Wireless 3 may not work properly with older smartphones on Android 9 and below due to lack of codec support. LC3.

7. Prevention: how to extend the life of wireless headphones Xiaomi

To avoid repeated breakdowns, follow these rules:

• 🔋 Charging: Do not keep your headphones on charge for more than 2 hours. Avoid full discharge (charge when the battery is at 20–30 levels%).
• 🧼 Clean: Once a month, clean speakers and contacts with a cotton swab. For the case, use dry soft cloth.
• 🌡️ Temperature: Do not leave headphones in direct sunlight or near heat sources (e.g. on a car torpedo in summer).
• 💧 Moisture: Even if the model has protection IPX4, Don't use headphones in the rain or in the shower. After sweating, wipe them with a dry napkin.
• 🎵 Volume: Do not listen to music at maximum for more than 30 minutes - this reduces the life of the speakers.

Also, look at firmware updates. Xiaomi regularly releases patches that fix plug-in and sound bugs.

1. Install the Xiaomi Wear app (for new models) or Mi Home (for older models).
2. Enable notifications about updates in the application settings.
3. Periodically check the "Firmware Update" section manually.

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The most common reason Xiaomi headphones break is sweat and moisture getting into the speaker. If you're actively involved in sports, choose models with protection. IPX5 and above (e.g. Redmi Buds 4 Active).

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