Xiaomi Mi Band repairs with your own hands: from faulty screen to charging problems

Xiaomi Mi Band fitness bracelets are some of the most popular activity tracking gadgets, but even they are not immune to breakdowns. The screen stopped responding to touch, the device does not turn on after a fall, or the battery discharges in a few hours? Don't rush to carry the bracelet to the service center: most malfunctions can be fixed by yourself, with a minimum set of tools and our instructions at hand.

In this article, we will discuss 8 The most common problems with the Mi Band 3/4/5/6/7 And how to fix them, from software failures to hardware failures:

• 🔧 Restore performance after falling or getting moisture
• 🔋 Resuscitate the discharged battery if the bracelet is not charged
• 📱 Fix synchronization errors with Mi Fitness
• 🔄 Reset the settings to factory if the gadget “hangs»

All of these methods are tested on real devices and don't require any special skills, but remember, self-repairing can take away your warranty if it's still valid, and only if you're willing to take responsibility for the outcome.

1. Diagnostics problem: why does Mi Band not work?

Before you take on a soldering iron or disassemble the case, determine the exact cause of the malfunction. Most problems with the Xiaomi Mi Band fall into three categories:

Start with the simplest checks:

• 🔌 Connect the bracelet to charge for 30 minutes, even if it doesn't show signs of life. Sometimes the battery runs out to the point where the device doesn't turn on right away.
• 📲 Restart your smartphone and check if the antivirus is blocking the connection to the Mi Band.
• 🔄 Update the Mi Fitness app to the latest version via Google Play or App Store.

⚠️ Warning: If the bracelet has fallen into water or been subjected to severe vibration (such as in the washing machine), do not turn it on immediately.Let it dry for at least 24 hours - moisture inside the case can cause a short circuit when power is applied.

2. Bracelet does not turn on: what to do?

If the Xiaomi Mi Band doesn’t respond to the press and doesn’t show signs of life, the causes can be different, from a dead battery to damage to the motherboard.

Step 1: Checking the charging

Make sure the problem is not with the cable or power supply:

• 🔌 Connect the bracelet to another USB-port or charger.
• 🔋 Try charging from a computer - sometimes power supplies from smartphones are not suitable for current strength.
• 🧲 Check if the cable is magnetized to the bracelet contacts. If not, maybe the magnet has moved away or the contacts are bent.

Step 2: Forced reset

If the bracelet is not turned on, but there is a reaction to charging (vibration or indication), try to reset it:

1. Connect the Mi Band to the charger.
2. Press the touch button (below the screen) for 10-15 seconds.
3. If the screen blinks or the device vibrates, release the button and wait for the reboot.

Try charging from different sources|Check the cable for damage.|Perform a forced reset|Make sure the warranty expires (if you plan to disassemble)

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Step 3: Disassembly and Checking Contacts

If the previous methods didn't work, you'll have to disassemble the bracelet.

• 🔧 Plastic spatula (mediator) or thin screwdriver
• 🧲 Tweezers
• 🔍 Lupa (optional, to inspect small details)

Disassembly instructions:

1. Remove the strap from the bracelet body.
2. Carefully tuck the latches around the perimeter of the body with a blade. Start on the side opposite the button.
3. Disconnect the battery (if it is connected by a plume) and inspect the board for oxidation, swollen capacitors, or burned tracks.

⚠️ Attention: In Mi Band models 5/6/7 The battery is often soldered to the board. If you can't solder, don't try to disconnect it by force, you risk damaging the board.

3. The screen does not respond to touch: how to recover?

If the Mi Band display glows but doesn’t respond to swipes or taps, the problem may be:

• 📱 Sensory layer (damaged after falling)
• 🔧 Shoe (the contact between the screen and the board has gone away)
• 🦠 Software failure (firmware glitch)

Method 1: Reset and reset

Start with the simplest:

1. Connect the bracelet to the charger.
2. Press the button for 10 seconds until you feel the vibration.
3. If the screen is working, reset through the menu: Settings → Reset.

Method 2: Checking the plume (disassembly required)

If the reboot didn’t help, take apart the bracelet and check:

• 🔌 The density of the screen plume to the circuit board connector. Carefully disconnect and reconnect it.
• 🕵️ Integrity of the plume – if it is torn or bent, a replacement will be required.
• 💧 No moisture under the screen. If there is condensation, dry the bracelet in rice or silica gel for 24 hours.

For Mi Band models 4/5/6 The screen plume is often attached to adhesives, and if it's gone, you can gently glue it back with double-sided tape (don't use superglue!).

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If the screen only responds to a part of the touch (for example, the right side is not working), the touch layer is likely damaged, in which case it is cheaper to buy a new bracelet than to repair the screen, replacing it will cost 70-90% of the cost of the device.

4 Bracelet not charging: causes and solutions

One of the most common problems is that the Xiaomi Mi Band is not charging or charging very slowly, and the reasons can be in the cable or in the device itself.

Checking of the charger

Start by diagnosing the cable:

• 🔌 Try charging the bracelet from another USB-port (for example, from a laptop instead of a socket).
• 🔋 Check the cable for damage: bent contacts, insulation breaks.
• 🧲 Make sure the magnetic connector fits tightly to the bracelet contacts.

In the Mi Band models 3/4 The spring contacts in the charging connector often break down, and you can bend them neatly with a needle, but you can be careful, because if you overdo it, the contact will disappear completely.

Cleaning the bracelet contacts

If the cable is working, but charging is not going, the problem may be in the oxidized contacts on the bracelet:

1. Wet the cotton swab in alcohol or liquid to clean the contacts.
2. Gently wipe the gold contacts on the back of the bracelet.
3. Let it dry for 10-15 minutes and try charging again.

Battery replacement

If the bracelet is turned on only on charging and immediately turns off, most likely, the battery has exhausted its life. The Mi Band uses lithium-polymer batteries with a capacity of 100-150 mAh, which degrade after 2-3 years.

How to replace the battery:

1. Disassemble the bracelet (see section 2).
2. Unplug the old battery or disconnect the plume (depending on the model).
3. Install a new battery (you can order from AliExpress for “battery for Mi Band [model]”).
4. Seal contacts or connect a plume, assemble the body.

⚠️ Warning: When soldering the battery, don't overheat it - lithium polymer batteries can swell or ignite. Use a soldering iron with a power of no more than 30 watts and work quickly.

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If the bracelet doesn't turn on after the battery is replaced, check the polarity of the connection «+» and «−» may cause the charge to fail.

5. Resetting settings to factory

If the Mi Band is buggy, doesn't sync with the phone, or shows incorrect data, resetting to factory settings will help, which will delete all data from the bracelet, but return it to working condition.

Method 1: Through the menu of the bracelet

If the screen is running:

1. Scroll through the menu to the Settings (cog icon).
2. Select Reset (usually the last item).
3. Confirm the action - the bracelet will reset.

Method 2: Through the Mi Fitness app

If the bracelet is connected to the phone:

1. Open the Mi Fitness app.
2. Go to Profile. → Mi Smart Band.
3. Choose Untie the device - this will lead to a reset.

Method 3: Forced reset (if the bracelet does not respond)

If the screen is not working, but the bracelet vibrates when connected to the charger:

1. Connect the Mi Band to the charger.
2. Press the button for 20-30 seconds until you feel a triple vibration.
3. Release the button and the bracelet will reset and reset.

Once reset, re-attach the bracelet via Mi Fitness, and if the problem was a software failure, the device will work normally.

6.Sync problems: bracelet not connected to phone

If the Xiaomi Mi Band doesn’t sync with the app, check out the following points:

Bluetooth Verification and Permits

• 📱 Make sure your phone is Bluetooth enabled and Mi Fitness has access to geodata (on Android 10)+ It's a must!).
• 🔄 Reboot your smartphone – sometimes a simple reboot helps.
• 📋 Check if the antivirus or power saving mode blocks the application.

Reconnect the bracelet

If the connection is permanently broken:

1. In Mi Fitness, remove the bracelet from the list of devices.
2. On your phone, forget the device in Bluetooth settings.
3. Reset the bracelet (press the button for 10 seconds).
4. Start Mi Fitness and reconnect the bracelet.

Changing the region to Mi Fitness

Sometimes sync problems arise from the wrong region in the application.

1. Open Mi Fitness and go to Profile → Settings → Region.
2. Choose China (yes, it’s not a typo – it often helps!).
3. Restart the application and try to sync the data again.

⚠️ Note: If some features (e.g. Mi Pay) are lost after the region change in Mi Fitness, return the previous settings. This method is only needed to diagnose connection problems.

7. Recovery after moisture is injected

Xiaomi Mi Band is protected by the IP68, It doesn't mean it can withstand swimming in the sea or washing in a car:

Emergency measures

• ⏱️ Do not turn on the bracelet and do not connect to charging for at least 24 hours.
• 🧂 Place it in a silica gel bag (eat in shoe boxes) or unpeeled rice.
• 🌬️ Do not use a hair dryer or battery – hot air can warp the board.

Disassembly and drying

If the bracelet is not turned on after drying:

1. Disassemble the body (see section 2).
2. Wipe the board and battery with an alcohol tampon.
3. Check if there's any corrosion on the contacts. If there's any, clean it with a blower.
4. Leave the fee to dry in the air for another 12-24 hours.

If after drying the bracelet does not work, most likely, the fee is damaged - in this case, repair will cost more than buying a new device.

Replacement of the strap and body

The Mi Band is a consumable that wears out in 6-12 months, and if it breaks or loses its appearance, it is easy to replace:

How to remove the strap

Depending on the model:

• 🔗 Mi Band 3/4: press the latch on the back side and pull the strap up.
• 🔗 Mi Band 5/6/7: Move the locker to the side (located on the inside of the strap) and remove it.

Choosing a new strap

When buying, pay attention to:

For sports, it is better to choose a silicone strap - it does not absorb sweat and is easy to wash, for the office, a leather or fabric version will suit.

Replacement of the hull

If the bracelet case cracks or scratches, it can also be replaced.Buy the original module (for example, on AliExpress for the request "Mi Band [model] module") and transfer the fee to it from the old bracelet:

1. Disassemble both hulls.
2. Carefully transfer the board, screen and battery to the new case.
3. Make sure all the plumes are tightly connected.

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When replacing the body, check compatibility! For example, the Mi Band 5 and Mi Band 6 modules look similar, but are not interchangeable due to different screen connectors.

FAQ: Frequent questions about repairing Xiaomi Mi Band