One Xiaomi headphone stopped working: what to do

The situation when a pair of wireless headphones suddenly stops one of them, familiar to many owners of Xiaomi equipment. This can happen at the most inopportune moment: during training, a trip to the subway or an important phone conversation. The user immediately begins to panic, believing that the device has failed irrevocably, but in most cases the problem lies in a software failure or banal contamination, not in a break in the speaker.

Before you carry a gadget to a service center or write a return statement, you need to conduct a number of diagnostic procedures. Often, desynchronization of the left and right channels is solved by simply rebooting or cleaning the charging contacts. In this article, we will discuss in detail all possible reasons for the silence of one of the speakers and offer step-by-step instructions for restoring their performance.

It is important to understand that the algorithms of work TWS-The True Wireless Stereo is built so that devices can behave independently of each other, so if one earphone dies faster or loses connection, the other one will continue to work, creating the illusion of failure.

Diagnostics and initial connection check

The first step is always to check the battery charge. Often one of the headphones, like the right one, acts as a master and discharges faster, or the contacts on it have become oxidized, which causes it to not charge in the case. Put both earphones in the charging case and make sure that the indicators are on. If the silent headphone indicator does not light up, try to wipe the contacts with an alcohol napkin.

Then you have to eliminate the problems on the part of your smartphone. Try connecting to another device: a tablet, a laptop or a friend's phone. If the other gadget has sound in both channels, then the problem is the Bluetooth settings of your main phone, maybe the system has lost the balance settings or activated the mono-sound mode, which redirects all the stream to one channel.

Notice the indication of the headphones themselves. When removed from the case, they should flash, signaling readiness to pair, If one of them is silent and does not show signs of life even after a long charge, this may indicate a deep discharge of the battery or the "hang" of the power controller, in which case a forced reset procedure will be required.

⚠️ Warning: If the headphone doesn't respond to charging connections for more than 30 minutes, don't try to disassemble the case right away.Give the lithium-ion battery time to "wake up" from the weak current.

Also check if the phone has Mono-audio activated in its settings. In Android, you can find this in the Special Options → Rumor section. If this switch is on, the stereo signal is added and fed to only one channel, which is often perceived by users as a breakdown of the second headphone.

The procedure for complete reset (Hard Reset) headphones

The most effective way to solve software errors, including channel desynchronization, is to completely reset the settings to factory ones. This process causes the headphones to forget previous connections and re-identify each other as a pair. For Xiaomi models such as Mi True Wireless Earbuds Basic or Redmi AirDots, the procedure may be slightly different, but the general principle is the same.

First, remove the device from the list of paired devices in the phone. Find the name of your headphones in the Bluetooth menu, click on the gear or the "i" icon and select "Forget the device" or "Unpair the pairing." Then turn off Bluetooth on the smartphone so that it does not try to automatically connect during the reset process.

Now, to the reset mechanics, put both earphones in the charge case, and if there's a button on the case, press it on the charge case. 10-15 If the button is not present, you must simultaneously touch the touch zones (or buttons) on both earphones while they are in the case and hold around the headphone. 20 Indicators should often blink red or white, which signals a successful reset.

After a successful reset, turn on Bluetooth on your phone and search for new devices. The headphones should be defined as a new, previously unknown device. It is important to do the pairing correctly: often you first need to connect one earphone, wait for the connection, and then remove the second one so that they synchronize with each other.

Problems with charging and contact

One of the most common reasons why one Xiaomi earphone stopped working is the banal lack of charge in its battery, which is due to contamination of charging contacts, and during operation, earwax, dust and skin fat enter the case, creating an insulating film.

To clean, you'll need a cotton swab and some isopropyl alcohol or a special contact cleaner. Carefully wipe the contacts on the earpiece itself and inside the recess of the case. Do not use water, as it can cause corrosion or short circuit. After cleaning, let the alcohol completely evaporate before inserting the headphones again.

Also check if the headphones fit tightly in the case. Sometimes, because of a manufacturing defect or a piece of garbage, one of the headphones doesn't fully fit into the socket, and the magnetic connector doesn't close. Try pressing the headphone in the case slightly or moving it to make sure there's contact. The charge indicator should catch fire.

⚠️ Warning: Do not use sharp metal objects (needles, pins) to clean the contacts inside the case.You may damage the spring mechanism or close contacts, which will cause the charger to break down.

Contamination of speakers and nets

If one earphone is working, but the sound is much quieter or distorted, the problem is probably the physical contamination of the sound grid. Earwax is the main enemy of intrachannel-type acoustic systems, and it penetrates deep into the pores of the grid and blocks the output of the sound wave.

You can use a soft toothbrush or a special brush to clean electronics, carefully, without pressing hard, brush the speaker grid, and the movements should be sweeping, from center to edge, and you can pre-drop a drop of alcohol on the brush to soften the contamination, but make sure that the liquid does not get inside the case.

There's also a scotch method, which is to stick a small piece of sticky tape onto the speaker grid, press it tightly and pull it hard, and it's a good way to pull out surface contaminants that are stuck in the grid cells, and repeat the procedure several times until the grid is visually clean.

After cleaning, check the sound. If things get better but they're not perfect, maybe the sulfur has penetrated deeper, and you'll need professional ultrasonic cleaning in the service, but 90 percent of the time, mechanical cleaning is back to the volume.

Balance settings and special Android features

Sometimes the user accidentally changes the audio balance settings in his smartphone, shifting the sound completely into one channel, often when carrying the phone in his pocket or using cases with protruding edges that can press on the screen. Balance check is a mandatory stage of diagnosis.

Go to your phone's settings, select "Sound and Vibration" or "Special Features." Find "L/R Balance." Make sure the slider is in the center, and if it's moved left or right, the sound will only play back in the appropriate headphone.

It's also worth checking for updates for the headphones themselves through the Mi Wear app or Xiaomi Earbuds. Manufacturers often release patches that fix bugs with desynchronization. The firmware update can take a few minutes, so make sure the case is at least 50% charged.

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Use the Mi Wear app to calibrate the touch control. Sometimes the "dead" earphone is simply locked or tuned to a feature that does not reproduce sound (for example, activating noise cancellation without music).

Hardware malfunctions and battery wear

If all the software methods, cleaning and resetting didn't work, there's probably a hardware breakdown. The most common reason is battery failure. Lithium batteries lose capacity over time and may stop holding charge at all. If the earbud is over 2-3 years old, it's a natural process.

Another possible reason is that the speaker plume has been peeled off inside the body due to moisture or impact. In Xiaomi Mi True Wireless models, the speakers are connected with thin plumes that can oxidize, which requires disassembling the body (which is difficult due to the adhesive connection) and soldering or cleaning the contacts.

It's also possible that the Bluetooth module itself or the charge controller will fail, and if the headphone doesn't turn on, charge, or react to the reset, it's likely that the chip has burned, and it's not cost effective to repair those components, because the cost of the work will exceed the cost of the new device.

⚠️ Attention: Self-disassembly of Xiaomi headphones almost always leads to damage to the plastic case, as they are assembled on latches and glue. If the device is warranted, any attempts to open it will invalidate it.

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If the headphone is not charged after cleaning the contacts and reset, the battery or power controller is likely to have failed, requiring a replacement of the element or device.

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