Replacement of buttons on Xiaomi: from diagnostics to installation of new elements

The physical buttons on Xiaomi smartphones and smart devices wear out over time: they stop working clearly, they fail or even fail. If your Redmi Note 12 does not respond to the power button press, and the Mi Band 7 ignores touch key touch, do not rush to carry the equipment into the service. In 80% of cases, the problem is solved by replacing the buttons yourself, and this article will help you do this without errors.

We will learn how to diagnose a malfunction (perhaps it’s not the button!), pick up original parts for popular models (POCO X5, Redmi 10C, Mi 11 Lite, etc.), and gradually replace the power, volume or touch buttons on fitness bracelets. Separately, we will focus on typical beginner errors that lead to damage to the plumes or motherboard. For clarity, we provide a table of compatibility of buttons and video instructions.

How to know if the button is broken: 4 tests

Before you disassemble the device, make sure that the problem is in the mechanical part. Often the "default" button is the result of software failures or contamination of contacts.

• 🔍 Visual inspection: illuminate the button with a flashlight - if you see backlash, cracks or corrosion, the detail accurately requires replacement.
• 📱 Testing through the engineering menu: dial ##4636## (for Android) and select Hardware Testing. In the Buttons section, check the system's response to the pressing.
• 🧹 Contact cleaning: moisten the cotton swab in alcohol and gently wipe the area around the button. Sometimes the oxidation of the contacts blocks the signal.
• 🔄 Resetting: If the button works in the engineering menu but does not respond in the interface, reset via Settings → System system → Resetting settings.

If the button is still not working after this manipulation, proceed to replace it, except for touch-sensitive devices (such as Xiaomi Mi Mix 3 or POCO F4), where the problem may lie in damage to the display module, in which case a comprehensive diagnosis is required.

Tools and parts: what to buy to replace

To replace the buttons on Xiaomi, you will need a minimum set of tools, but you should not save on quality - cheap plastic blades can scratch the case, and uncalibrated screwdrivers can tear the screws.

Where to buy spare parts? Official Xiaomi buttons are sold on AliExpress (Xiaomi Official Store or Mi Global Store), as well as on specialized platforms like RepairUniverse or eBay. The cost of the original power button for POCO X3 Pro is about 300-500 rubles, for flagships (Xiaomi 13) - up to 1200 rubles. Be careful with cheap analogues: they often have a different button stroke or incompatible connectors.

⚠️ Note: If you replace the button on a secure device IP68 (for example, Xiaomi 12T Pro, after the repair, the leakage will be broken. To restore it, you will need special glue and gaskets - you can order them with the button.

Step-by-step: how to replace the power button on Xiaomi

Consider the Redmi Note 10 Pro, one of the most popular models with a typical button design. For other smartphones (POCO M4 Pro, Mi 11 Lite), the algorithm is similar, but the screws and button mounting type may differ.

Turn off the phone and remove it. SIM-map

Remove the back cover (use a 60°C hair dryer to soften the glue)

Disconnect the battery (required!)

Take a picture of the location of plumes and screws

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Step 1 - Disassembly of the hull

Heat the back cover with a hair dryer (temperature no higher than 60°C!) for 2-3 minutes to soften the glue. Insert a plastic shoulder blade into the gap between the body and the screen (start at the bottom edge) and gently tuck the cover. Don't put too much effort into it - on the Redmi Note 10 Pro, the fingerprint scanner plume passes just under the power button!

Step 2. Battery disconnection

When you remove the lid, first turn off the battery by putting a plastic blade on the battery connector. If you don't, shorting the screwdriver can knock out the motherboard. On some models (like the POCO F3), the battery is glued to be carefully lifted behind a special loop.

Step 3: Dismantling the old button

The power button on Xiaomi is attached to the motherboard via a flexible plume or directly soldered. In the first case, you just need to disconnect the connector (plug it on the side), in the second case, you need a soldering station. Note the metal frame under the button: it is often fixed on latches or screws.

Step 4: Install a new button

Before installing a new part, clean the contacts on the board with alcohol. If the button is on the plume, just connect it to the connector and lock the frame. Use a low-temperature solder (Sn63Pb37) and a flux RMA-223. After installation, check the movement of the button: it should be pressed with a slight click, without backlash.

Replacement of volume buttons: features and pitfalls

Xiaomi’s volume buttons break less frequently than the power button, but they have their own nuances. The main difficulty is the compact location: on most models (such as the POCO X4 Pro), both buttons (+ and -) are combined into one module that is attached to the board through a single loop, which means that if one button breaks, you will have to change both.

Another feature is the mechanical connection to the vibrator, and on some devices (like the Redmi 9A), the volume buttons physically touch the vibrator, and if you change it in a careless way, you can damage the vibrator membrane, which will cause no vibration. To avoid this, follow the algorithm:

1. Remove the back cover and disconnect the battery (as in the instructions above).
2. Unscrew the screws that fix the metal plate above the buttons (usually 2-3 pieces).
3. Carefully slap the button module with a spatula. Don't pull it up, first unplug the plume!
4. When installing a new part, make sure that the plastic guides on the module match the slots in the case.

If you change the volume button and you reverse it (pressing + reduces sound), the problem is that you don't connect the plume correctly. Turn it 180 degrees -- there's usually a triangle or dot tag on the connector that indicates the correct position.

Replacement of touch buttons on Xiaomi fitness bracelets

Xiaomi Mi Band fitness bracelets (especially 5-8 generation models) often suffer from broken touch buttons. Unlike smartphones, the button here is a tactile sensor integrated into the display module, which complicates repair, but makes it possible even without soldering.

To replace the button with Mi Band 7 or Mi Band 8, you will need:

• 🔧 Set T3/T4 screw-driver.
• 🧲 Screen suction cup (you can use the suction cup from the iPhone).
• 📦 New sensor module (see code for example, XMSH17HM For the Mi Band 7).

Step-by-step process:

1. Heat the bracelet screen with a hair dryer (50°C) and suction cup carefully separate it from the body. Be careful - the display plume is very fragile!
2. Disconnect the touch button plume (marked red on the board). Use a plastic shoulder blade to avoid damaging the contacts.
3. Install a new module and fix it with heat glue. Importantly, don't put glue on the sensor area!
4. Collect the bracelet in reverse order. Once activated, calibrate the sensor through the Mi Fitness app.

⚠️ Note: On the Mi Band 6 and older, the touch button is combined with the display. If the screen does not respond to touch after replacing, check the integrity FPC-The plume (thin flexible cable between the display and the board) is the most common cause of failure to repair it.

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Before assembling the bracelet, apply a thin layer of silicone lubricant to the rubber seals – this will restore water resistance (but not the original IP68 protection!).

Typical errors when replacing buttons and how to avoid them

Even experienced craftsmen sometimes make mistakes that lead to additional breakdowns, and we've compiled the TOP-5 mistakes and ways to prevent them:

Especially careful should be with models where the buttons are integrated into a single module with a fingerprint sensor (for example, Xiaomi 11T Pro or POCO F5). Here, an error when replacing can disable the scanner, and its repair will cost 3-4 times more than replacing the button itself.

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If you are not sure about your soldering skills, entrust the replacement of buttons with soldered contacts (for example, on Xiaomi Black Shark) to professionals. The cost of repairs in the service rarely exceeds 1500 rubles, while fixing the consequences of unsuccessful soldering can cost 5-10 thousand.

Where to buy spare parts and how much it costs

Prices for Xiaomi buttons vary depending on the model and type of part, and here is the current cost table for popular devices (data for 2026):

Where to look for parts:

• 🛒 Official stores: AliExpress (sellers Xiaomi Official Store, Mi Global Store), Mi.com (section "Accessories").
• 🔧 Service centers: many SCs sell original parts with a warranty (for example, Xiaomi Service Russia).
• 🌍 Overseas sites: eBay, RepairUniverse, iFixit (delivery longer, but wider range).

When buying, pay attention to:

• 📋 Part code (must match the original, for example, MB-045-123 For the Redmi Note 11).
• 📦 Complete: the set must have fasteners and frame (if applicable).
• ⭐ Reviews: Check if there are any complaints of incompatibility or quick failure.

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If you buy a button on AliExpress, choose options marked "100% Original" or "Genuine Xiaomi Part." Cheap counterparts often have a different tapping stroke or incompatible connectors.

Frequent questions about replacing buttons on Xiaomi