One Xiaomi headphone has gone off: how to turn on and return the sound

The situation when one of the modules of a wireless headset fails is familiar to many owners of budget and premium electronics. Often users are faced with the fact that one earphone has turned off, and the device stops playing audio in one channel, this can happen suddenly, after being removed from the case or during active use of the gadget.

Xiaomi’s reason for this behavior often lies in the desynchronization between the left and right modules. Unlike wired models, each channel is an independent device that requires constant communication, and if the Bluetooth connection is broken, the sound disappears, creating the illusion of a breakdown.

But it's too early to panic. Most of the time, it's software-based, without going to the service center, you have to do a sequence of reconnect and reset, and we'll go through the restoring algorithms of your headset in detail below.

Diagnostics: Why the sound was lost in one channel

Before you start to act, it is important to understand the nature of the malfunction, because if one earphone goes off, it does not always mean that the speaker or the battery is physically broken, often it is a software failure that prevents the modules from "seeing" each other.

One of the common causes is the discharge of the batteries at different speeds. Even if you were charging the case, the contacts could oxidize, and one of the modules did not receive power. As a result, the Xiaomi TWS headset is one-way.

⚠️ Warning: If one channel is silent after fully charging and restarting, check the protective film on the charging contacts.

Also, you should rule out mechanical damage, and falling or getting moisture can disrupt the Bluetooth antenna inside the enclosure, which is visually imperceptible, but the signal stops transmitting steadily.

• 🔋 Different charge levels in modules due to poor case contact.
• 📶 Stereocouple out of sync (left and right are not “friends»).
• 📱 Bluetooth profile conflict in smartphone memory.
• 🔊 Mesh contamination speaker earwax or dust.

Understanding the root of the problem allows you to choose the right repair strategy, if it's contacts, cleaning will help, if it's in software, you'll need Hard Reset.

Basic methods of reconnection

The easiest way to switch off one earphone is to try reconnecting them manually. Often, Android or iOS systems forget the second channel and continue to broadcast the sound to only one.

Put both modules back in the charging case. Make sure the lights light up to signal the start of charging. Close the lid and wait 10-15 seconds, then open again. This action initiates re-pairing.

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Always put your headphones in the case at the same time so they are charged and synced with a pair, not separately.

If that doesn't work, try the following algorithm: Remove the Bluetooth device on your phone. Then, without closing the case, press and hold the touch zones on both modules (or the button on the case, if there is one) for 5-10 seconds, which will put them in search mode.

Then, search the devices on your smartphone again, and if you have one device with the model name on the list, instead of two identical devices, then the synchronization has been successful.

• 🔄 Remove the device from the list of conjugated in the phone settings.
• 📦 Place both modules in the case and close the lid.
• ⏳ Wait 10 seconds for a complete power outage.
• 📲 Start searching for new Bluetooth devices again.

Often, this simple restart allows the stereo to be restored to normal, and if the sound is in both channels, the problem is solved.

Complete reset (Hard Reset) of the headset

When simple methods don't work, you have to reset completely, and this action clears the internal memory of the modules of old profiles and errors, and if one earphone is disabled because of a software glitch, this method will help in 90% of cases.

First, place both modules in the charging case. Leave the lid open. Find the function button on the case case case (usually one). If there is no button, use the touch control of the ears themselves.

⚠️ Warning: During reset, the indicators may flash red and white. Do not remove the devices from the case before the procedure is completed.

Press the button on the case (or touch zones on both modules simultaneously) and hold for about 15-20 seconds. The indicators should blink several times, then go out or light up flat, this is a signal that Hard Reset is complete.

After the reset, you'll have to re-steal the gadget with the phone, as if you just bought it from a store. The old settings will be completely removed.

In some models, such as Xiaomi Redmi Buds 3 Pro or Mi True Wireless Earbuds Basic 2, the procedure may be different.

Features of the Mi Wear application and settings

For advanced diagnostics, use the official Mi Wear app (formerly Mi True Wireless) to see the real charge of each module separately and check the firmware version.

It often happens that one headphone is disabled due to the fact that it has an old version of the firmware that conflicts with the new version on the smartphone.

The app can also calibrate touch controls, sometimes by accidentally disabling one channel through the audio balance or mono settings on Android.

Check the sound balance. Some MIUI or HyperOS shells have equalizer settings where you can accidentally move the slider left or right, creating the illusion of a breakdown.

Cleaning contacts and eliminating physical defects

If the software methods didn't work, the problem could be physical. The oxidation of the charging contacts is a common reason why one earphone went off. It just doesn't charge in the case and it goes to zero.

Carefully examine the metal contacts on the modules themselves and inside the recess of the case. If you see a plaque, gently wipe them with a cotton swab soaked in alcohol. Let them dry before installation.

⚠️ Note: Do not use metal objects (needles, paper clips) to clean contacts, so as not to close the chain or damage the coating.

Also check if the buttons or sensors are stuck. Sticky sweat or dirt can block the on signal. Wipe the body with a soft dry cloth.

• 🧹 Wipe your contacts with an alcohol napkin.
• 🔍 Check if the spring pins in the case are drowned.
• 💧 Make sure there is no moisture inside the speaker grid.
• 🔌 Try charging the case from another cable or block.

Sometimes it helps to sway the module lightly in the case socket to find the position at which the charging indicator will light up, and if the indicator does not burn at all, there is no contact.

What to do if nothing helps

In the rare cases where one earphone is turned off and neither resetting nor cleaning helps, you can talk about a battery failure or Bluetooth module. Lithium polymer batteries degrade over time.

If the device is warranty, do not attempt to open the case yourself. This will result in a loss of warranty obligations.

For models without warranty, repairs are often not cost-effective; it is easier to buy a new kit than to look for rare components to replace.

However, if you have experience in soldering and access to donor parts, you can try replacing the battery, but it requires high skill and special equipment.

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If after all the manipulations one channel is silent, most likely the problem is the physical wear of the battery or a break in the plume inside the case.

Frequently Asked Questions (FAQ)