Why Xiaomi’s One Headphone Doesn’t Work: Diagnostics and Solution

The situation when one Xiaomi earphone suddenly stops playing sound, familiar to many owners of wireless acoustics, it can happen at the most inopportune moment: during a run, an important call or watching a movie, often users immediately panic, believing that the device is out of order permanently and requires expensive repairs in the service center.

However, in most cases, the problem lies not in hardware failure, but in a software failure or disruption of synchronization between channels. TWS-Headsets are complex microcomputers that can simply “forget” each other or get the wrong command from a smartphone.

In this article, we’ll look at all the possible reasons why Xiaomi Mi True Wireless Earbuds or newer models may be silent on one hand, and learn how to properly reset, check contacts, and update firmware to bring back full stereo sound.

The main reasons for the lack of sound in one channel

The first thing to understand is that the nature of the malfunction can be both software and physical. If one Xiaomi Redmi Buds headphone does not work, most often it is the result of desynchronization. The left and right channels must work in pairs, transmitting data to each other. If the communication between them is broken, the sound will only go in the master earphone.

The second common cause is contact contamination, where the metal part of the charging case or earbuds itself accumulates dust, skin fat and oxides, which prevents normal charging, causing one module to discharge faster and shut down while the other is still running.

⚠️ Attention: If the headphone fell into the water or was subjected to a strong impact, self-disassembly can finally violate the tightness of the case.

Also, consider the Bluetooth protocol: interference from other devices, congestion of the air or bugs in the operating system of the smartphone can lead to the loss of data packets, which is perceived by the user as loss of sound.

Diagnosis and verification of the charging case

Before you start complex software manipulations, you need to eliminate the banal lack of power. Often, one Xiaomi AirDots simply did not charge due to poor contact. Visually, the indicator on the case may show a full charge, but the module will be empty inside.

Look carefully at the contact areas, which are two little golden dots on the bottom of the earpiece and the corresponding pins inside the case socket. If you see a plaque on them, gently wipe them with a cotton swab slightly soaked in alcohol. Do not use water, because the moisture inside the case will cause a short circuit.

• 🔋 Put the headphones in the case and make sure the magnets are tightly pulling them to the bottom.
• 👀 Check if the charging indicator on each earbud lights up when installed in the case.
• 🧹 Clean the speaker mesh of earwax, which can block the sound, creating the illusion of a breakage.

If one earphone doesn't catch fire after cleaning, try leaving them in a case for 30-40 minutes, even if the indicator doesn't react immediately. Sometimes a deeply discharged lithium polymer battery takes time to "rock" before the indication begins.

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Use a dry toothbrush to clean the speaker mesh. With light circular motions, you can remove the old sulfur that often muffles the sound, making you think the earphone is broken.

Complete resetting and reconnection procedure

The most effective way to solve software glitches is to completely reset, a procedure that forces Xiaomi True Wireless to erase the current pairing settings and create a new pair from scratch, especially if the headphones are out of sync with each other.

To start, remove the device from the Bluetooth list on your smartphone. Click on "Forget the device" or "Disable." Then place both earbuds in the charge case and leave the lid open. Find the function button on the case case case case case (usually hidden or located at the back).

Press the button for 10-15 seconds. The indicator should start flashing white or orange often, which signals the transition to pairing mode. Then find the device again in the phone and connect. It is important to perform this procedure when both headphones are in the case.

⚠️ Warning: Do not remove the headphones from the case during reset, interruption of the process can cause the left and right channels to stop "hearing" each other, and the stereo mode will not turn on.

If your model doesn't have a physical button, reset is often done by long-term touching of the touch zones on both headphones simultaneously while they are in the ears or out of the case.The exact combination for your Xiaomi model is better clarified in the instructions, as it may differ for different series.

Sound balance settings and system parameters

Sometimes hardware is good, but software is only redirected to one channel. Android and iOS have accessibility settings that allow you to adjust the left-right channel balance. If the slider is moved aside, the second earbud will be silent.

You can check this in the settings section of your smartphone. The path may vary depending on the MIUI shell or the Android version, but it is usually in the special features menu. It is also worth checking the settings of the application itself through which the content is played (for example, YouTube or Spotify), as there may be equalizers.

Below is a table with approximate ways to adjust balance for different devices:

Make sure the slider is centered. If it's moved, it should be in all speakers when it's back in center, a common problem after a phone firmware update, when settings are reset to factory settings or changed by third-party optimization apps.

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Displacement of the audio balance is one of the most frequent “pseudo-breaks”, which is easy to fix software without going to the service.

Update the firmware through the Mi Wear app

Manufacturers regularly release updates to fix connectivity bugs and improve connection stability. If one Xiaomi headphone is unstable, there may be a bug in its current version of the software that the company's engineers have already fixed.

To manage the headphones, Xiaomi recommends using the official Mi Wear app (or Xiaomi Earbuds for older models).Plug the headset to your phone, open the app and check for updates. The process takes a few minutes and requires the headphones to be charged at least 20%.

Updating process:


1. Connect the headphones to the smartphone.




2. Open Mi Wear.




3. Press the headphone image.




4. Select "Update Check."




5. wait until the end (earphones can not be removed from the ears or case).

During the update, the indicators may flash in an unusual mode, and the sound may be interrupted. This is normal behavior. Interrupting the process can lead to the "bricking" of the device, so make sure that the phone does not go into sleep mode and does not lose connection to the Internet.

Mechanical damage and factory marriage

If the software methods, cleaning and resetting didn't work, there's a high probability of a physical malfunction. TWS-The headphones are very compact, and even a microscopic separation of the speaker plume from the board can lead to silence, which often happens after the device falls on a hard surface.

The battery life is also worth considering. Over time, the battery capacity decreases, and one of the headphones (usually the one that is a slave or master device) can discharge much faster than the second, in which case it simply turns off after 10-15 minutes of operation while the second one continues to play.

• 💧 The ingestion of moisture inside the body causes corrosion of contacts and short circuit.
• 🔨 Mechanical impact can damage the speaker's membrane, causing wheezing or a complete lack of sound.
• 🔋 Li-Pol battery wear leads to uneven channel discharge.

In the case of factory defects or physical damage, repairs are often not cost-effective due to the high cost of work and the difficulty of finding original components. However, if the device is warranty, you should contact a Xiaomi authorized center for replacement.

⚠️ Attention: Opening the earbud almost always results in a loss of warranty, tool marks remain on the body, and leakage is permanently broken (FAQ) Why is Xiaomi's left earphone quieter than the right? Most often it's due to contamination of the sound mesh with earwax. Also check the balance settings in the phone. If the mesh is clean and the balance is normal, it may have degraded the speaker or there is a software bug that requires resetting. Can you just use one Xiaomi headphone? Yes, most of the current Xiaomi True Wireless models support mono-use. You can only take one headphone out of the case, and it will work. However, switching to this mode may require a separate action in the Bluetooth settings. What to do if the earphone is not charged in the case. If that doesn't work, check if the case itself is working (whether it's charging from the network). Perhaps the problem is in the charging cable or the case connector, not in the headphone itself. How do you know if the battery is sitting in the headphone? The device will stop responding to touch, the indicators will stop burning, and the smartphone will stop seeing the earphone when you open the case. In the Mi Wear application, the charge level will show 0% or the dash. Does the Bluetooth version of the phone affect the work of the headphones? Yes, backward compatibility is, but using very old versions of Bluetooth will stop burning, although the Bluetooth connection quality and the base should be stable.