One Xiaomi headphone doesn’t work: a complete repair guide

The situation when suddenly stops working one headphone Xiaomi, familiar to many owners TWS-Whether it’s the popular AirDots, the more modern Redmi Buds, or the flagship Mi True Wireless Earphones, the problem is often software failure or contamination of contacts. Users are faced with the left or right channel simply silent, emits silent clicks or does not light up at all when extracted from the case.

Restoration often doesn't require complex hardware. In most cases, it's enough to reset the settings correctly or clean the charging contacts thoroughly with alcohol. However, if one of the headphones discharged faster than the other and "sleeped off," the standard connection procedure may not work. It's important to understand that wireless headphones are two independent devices that synchronize with each other, and desynchronization is one of the main reasons for the silence of one channel.

In this article, we will take a look at all possible causes of malfunction, from trivial discharge to hardware problems. You will learn how to properly reset for different models, how to check the status of the battery and when to think about replacing the device. Follow the instructions consistently to return quality sound to your favorite headset.

Primary diagnostics and charge check

The first step is always visual inspection and charge check. Often, one earbud doesn't work just because its battery is completely depleted while the other one is still holding a charge. This may be because the device didn't fit tightly into the case when it was last charged and contact was not made. The indicator on the troubled earbud may not catch fire even when it's retrieved, which confuses the user.

You need to put both earbuds in the charge case and connect it to the network for 30-60 minutes. Pay attention to the indicators: if one of them does not light up red or white, then the current does not come. In this case, you should try to move the earbud in the socket to find the position at which the charging light will light up. Contact oxidation is another common reason for the lack of reaction.

For a good diagnosis, use the following approach:

• 🔍 Carefully inspect the metal contacts on the headphones themselves and inside the case for dirt or oxides.
• 🔌 Use a different cable. USB and power supply to eliminate the problem with the power source.
• ⏱ Leave the devices to charge for a long time (up to 2 hours), even if the indicators do not show signs of life immediately.

If you have a long charge, one earphone still doesn't show signs of life, move on to the next step, cleaning. Sometimes a layer of earwax or dust blocks the sensors or the charging port, creating the illusion of a breakdown.

Mechanical cleaning and pollution elimination

Contamination of the speaker grid and charging contacts is the most prosaic but often overlooked cause of sound problems. Earwax, dust and pile from pockets can tightly clog the speaker's small mesh, making the sound very quiet or disappearing completely. In addition, fatty plaque on the contacts prevents normal charging, which causes the earphone to be constantly discharged.

To clean, you'll need a cotton swab, some isopropyl alcohol (or special electronics fluid) and a toothpick. Carefully, without pressing hard, wipe the outside of the speaker and metal contacts. Isopropyl alcohol evaporates quickly and leaves no conductive traces, making it the perfect tool for maintenance.

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Never use water or household cleaning products to clean electronics, as they can cause internal components to corrosion and permanently disable the device.

The cleaning process requires accuracy:

• 🧹 Slightly moisten the cotton swab in alcohol and carefully wipe the charging contacts on the end of the headphone.
• 🌬 Carefully remove visible dirt from the speaker's protective grid, trying not to push the trash deeper.
• 🧐 Use a toothpick to remove hardened sulfur particles from hard-to-reach areas, but act extremely carefully.

After cleaning, be sure to let the devices dry completely for 5-10 minutes before placing them in the case.Wet alcohol should not get inside the case. If after this procedure the sound appeared or the charging indicator caught fire, the problem was solved.

Complete Reset (Hard Reset)

If the physical cleaning didn't work, it was likely that the headphones were out of sync or that the software was out of sync, and you'd have to reset the headphones completely, and that's a procedure that causes the headphones to forget the previous connections and rediscover each other, putting the left and right channels in the right order.

The method of discharge may vary depending on the model. TWS-Xiaomi and Redmi headphones without touch buttons on the case (for example, AirDots) 1/2, Redmi Buds 3 Lite is performed through the touch zones on the headphones themselves. For models with a button on the case (for example, Mi True Wireless Earphones). 2) physical button.

Let’s look at two main options for resetting:

1. Touch reset: Remove the headphones from the case. Simultaneously press the touch zones on both headphones and hold for about 20 seconds until the indicators flash red and white (or red several times).
2. Case button reset: Put the headphones in the case, leaving the lid open. Press and hold the function button on the case for 10-15 seconds until the indicator flashes white.

Once you reset, remove the headphone profile from the Bluetooth list on your phone (“Forget the device”) and pair it again. It is important to connect not one earphone, but to let the system see both devices at once. Often after reset, one earphone can connect to the phone and the second to the first earphone, restoring stereo mode.

Features of connecting different models

Xiaomi's ecosystem includes many wireless headphone models, and each has its own nuances. Understanding the specifics of your model will help you find a solution to the problem faster. For example, older AirDots models tend to be out-synchronized more often than the new Redmi Buds 4 Pro with active noise cancellation.

The table below shows the main differences in indication and control for popular series:

For some advanced models, such as the Xiaomi Buds 3 Pro or 4 Pro, it is critical to use the Xiaomi Earbuds or Mi Home app. You can check the firmware version of each headphone through the app. If the firmware on the left and right channel is different, one of them may not work correctly. Software updates often solve hidden software bugs.

If you have an app-enabled model, be sure to check the About section, which will show the percentage of charge for each headphone separately, which will help you determine whether the problem is software or whether one of the batteries has actually degraded.

Problems with Bluetooth and pairing

Sometimes the reason is not the headphones themselves, but the Bluetooth module of a smartphone or tablet. The accumulation of errors in the cache of Bluetooth connections can lead to the fact that the phone “sees” only one of the pair, and there may be conflicts with other connected gadgets that intercept the audio stream.

Try to do the following on the side of the smartphone:

• 📱 Go to Bluetooth settings, find your headphones and select “Forget this device” or “Cancel pairing».
• 🔄 Reboot your smartphone to clear temporary files and reset the communication module.
• 🔌 Turn off Bluetooth on all other devices in range to prevent automatic connection to your tablet or laptop.

After that, repeat the pairing procedure. If Xiaomi headphones don't work with one particular phone but work well with another, the problem is exactly the settings of the first smartphone. In this case, resetting the network settings on the phone can help, but remember that this will delete the saved Wi-Fi passwords.

⚠️ Note: If you are using Android 12 and above, make sure the app you are listening to music through has permission to access Bluetooth devices.

It's also worth checking if the Mono-audio feature is activated in the phone's special features, sometimes it turns on randomly and directs all the sound to only one channel, creating the illusion of a second headphone breakdown. Check the settings in the Special Features section → Rumor → Mono-audio.

Hardware malfunctions and battery degradation

If neither cleaning nor resetting nor reconnecting has helped, there's a hardware malfunction, the most common reason is a battery failure in one of the headphones, lithium polymer batteries have a limited lifetime of charge-discharge cycles, if the headphones are more than the average headphone. 2-3 In the past, one of the batteries could simply “die” and stop holding the charge.

Signs of hardware breakdown:

• 🔋 The headphone is charged in the case (light indicator), but switches off through 5-10 minute.
• 💥 The headphone warms strongly during charging or use.
• 🔇 Complete lack of response to any action, even after 3-4 charge-hour.

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If the headphone does not respond to charging and reset after all the checks, the battery or power controller is likely to have failed, requiring the replacement of the element or the entire device.

The second option is to damage the speaker or plume due to falling or getting moisture, and even if the earphone is protected from moisture (IPX4), sweat or rain can eventually oxidize the internal contacts, in which case recovery at home is almost impossible.

If the device is new, don’t try to open it yourself, as this will result in a loss of warranty service. Xiaomi usually changes faulty ones. TWS-headphones under warranty, if there are no traces of mechanical impact.

Frequently Asked Questions (FAQ)