Touchscreen on Xiaomi phone: device, principles of operation and problem solving

Touchscreen is a key element of any modern smartphone, and Xiaomi devices are no exception, but not all users understand what a touchscreen is and how it differs from a display. POCO stopped responding to touch, there were “dead zones” or the screen spontaneously presses buttons – the problem most likely lies in the touch layer.

In this article, we will discuss how the touchscreen works in Xiaomi smartphones, what technologies the manufacturer uses (from the budget Redmi Note to the flagship Xiaomi 14), and what to do if it fails, you will also learn how to diagnose a malfunction yourself and when to contact the service center.

What is a touchscreen and how it works in Xiaomi smartphones

Touchscreen is a transparent touchscreen layer that is overlaid on top of the display and responsible for recording touches. In Xiaomi smartphones, it is a thin film or glass panel with a microscopic grid of conductors that respond to touching a finger or stylus.

Structurally, the touchscreen and display are two separate modules, although in modern devices they are often glued together (technology). OGS — One Glass Solution? For example, the Xiaomi 13 Pro uses an embedded touch layer (In-Cell), where the touch panel is integrated directly into the display matrix, making the screen thinner and more sensitive.

When you touch your finger, you change the electric field at the point of contact, and the touchscreen controller calculates the coordinates of the click, and this data is transmitted to the processor, which converts them into commands, such as opening an application or scrolling through a page. In budget models (for example, Redmi). A2) Resistive technology can be used, and in flagships (Xiaomi Mix Fold 3) - capacitive with multi-touch support).

• 📱 Capacitive touchscreen – Responsive to skin conduction (used in 99% of Xiaomi smartphones) – Does not work with gloves without special coating.
• ⚡ Resistive touchscreen – responds to pressure (an outdated technology found in some Xiaomi push-button phones or cheap tablets).
• ✍️ In-Cell/On-Cell — modern technologies, where the touch layer is built into the display (used in Xiaomi) 12T Pro, POCO F5 Pro).

Differences between touchscreen and display: why it is important for repairs

Many users confuse touchscreen with display, but these are fundamentally different components:

In 80% of cases, when a Xiaomi smartphone falls, it is the touchscreen that breaks, not the matrix – this is due to the fact that the touch layer is thinner and fragile. However, in flagships with Gorilla Glass Victus (for example, Xiaomi 13 Ultra), the probability of damage is lower due to reinforced glass.

If the screen stopped responding to touch after the impact, but the image remained clear, the problem is precisely the touchscreen. If colored stripes appear or the backlight flashes, the matrix is to blame. Xiaomi service centers often offer to replace the entire display module, even if only the sensor is broken, which makes it easier to repair, but increases the cost.

⚠️ Attention: In models with technology OGS (For example, the Redmi Note 12 Pro+) The touchscreen and the display are glued together in the factory, and you can't separate them without damage, you'll need to replace the entire module.

Causes of failure of touchscreen on Xiaomi: from mechanical damage to software failures

Touchscreen can fail for a number of reasons, and let's look at the most common ones.

• 💥 Mechanical damage - falling to a hard surface, impact, severe compression (for example, in the pocket of jeans), even microcracks on the glass can disrupt the sensor.
• 💧 Moisture ingestion – water or condensate oxidize touchscreen contacts, leading to “glitches” (spontaneous pressing, non-functioning zones).
• ⚡ Temperature changes – if you leave your smartphone in the cold, and then bring it into a warm room, condensation can form inside.
• 🔧 Poor-quality repairs – when replacing the display in unofficial services, the touchscreen plume is often damaged or it is incorrectly connected.
• 🤖 Software failures are rare, but it happens that the touchscreen “gluts” due to firmware errors (for example, after updating). MIUI).

In the Xiaomi models with AMOLED-screens (e.g., screens, POCO X5 Pro or Xiaomi 12 Lite) touchscreen is more vulnerable to static electricity. If you often carry your phone in your pocket with keys or coins, the risk of damage increases.

It is also worth noting that in budget smartphones (for example, Redmi). 10A) It uses a cheaper glue to attach the touchscreen, and over time it can detach, leading to bubbles and broken zones.

How to check the touchscreen on Xiaomi: step-by-step diagnostics

Before you can carry your phone for repair, you can check the health of the touch screen yourself. Here's a simple algorithm:

1. Visual inspection: Turn on the screen and light up the flashlight at an angle, and if you see cracks or swelling under the glass, the touchscreen is damaged.
2. Sensor Test – Open the Phone app and type ##6484## (some models run ##4636## → «Equipment test. From the menu, select Touch Test and check your response to touch.
3. Check the tiles — touch the screen at 5-10 points at the same time, and if some areas do not respond, the sensor is defective.
4. Diagnostics via PC – connect your phone to your computer and use programs like Touch Screen Test (available on Google Play).

If you have Xiaomi on the base MIUI 14 and older, you can use the built-in tool:

1. Go to Settings. → The phone.
2. Tap 5 times on the item Version MIUI (The developer menu will open).
3. Back to Settings → Additionally. → For developers.
4. Activate the Show Touch option – touch points will now be displayed on the screen.

If the test revealed non-functioning areas, but the screen is intact, the problem may be in the plume or touchscreen controller, in which case you will need to disassemble the device.

⚠️ Note: On Xiaomi models with curved screens (e.g. Xiaomi) 11T Pro) the touch test may show false positives at the edges.

What to do if the touchscreen on Xiaomi does not work: ways to repair

If the diagnosis confirmed a faulty touch screen, you have several options:

• 🔧 Self-replacement is suitable for experienced users, you will need to buy the original touchscreen (for example, for the Redmi Note 11 it costs). ~2 500 ₽) and instruments: mediator, sucker, hair dryer.
• 🏢 The official service Xiaomi – guarantees quality, but the price can be overstated (for example, replacing the display module on Xiaomi 13 will cost 15 000-20 000). ₽).
• 🛠️ Unofficial service is cheaper, but the risk of running into poor-quality spare parts or incompetent craftsmen.
• 📱 Temporary solution – if the sensor is partially working, connect OTG-Use the mouse or Google Assistant.

To replace the touchscreen on Xiaomi, you will need:

1. New touchscreen (preferably the original or high-quality analogue from Tianma, BOE).
2. Set of screwdrivers (Torx) T3–T5, Phillips 00).
3. Plastic blades for disassembly.
4. A dryer or thermoplatform for softening the glue.
5. Double-sided tape or glue B-7000 fixative.

Step-by-step instruction (for models with removable touchscreen, for example, Redmi) 9A):

1. Turn off the phone and remove it. SIM-map.
2. Heat the screen edge with a hair dryer (~60°C) for 2-3 minutes.
3. Carefully tuck the screen with a plastic spatula, starting at the corner.
4. Disconnect the touchscreen plume from the motherboard.
5. Install a new touchscreen, connect the plume and check the performance.
6. Apply glue around the perimeter and press the screen (use strubcines or heavy books).

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Before disassembling, take a picture of the location of all the plumes and screws - this will help to properly assemble the phone back. Xiaomi models often use screws of different lengths!

If you are not sure of your abilities, it is better to contact the service. For example, at Xiaomi Authorized Service Center, replacing the touchscreen with a touch screen. POCO X3 Pro will be completed in 1-2 days with a guarantee of 6 months.

How much does it cost to replace the touchscreen on Xiaomi: a comparison of prices

The cost of repair depends on the model of the smartphone, the type of touchscreen and the place of circulation. Below is an indicative price for popular devices (for 2026):

Prices in official Xiaomi services are usually 20-30% higher, but they use original spare parts and give a guarantee. In informal workshops you can save, but the risk of running into a fake (for example, instead of Gorilla Glass put ordinary glass).

For models older than 3 years (like the Redmi Note 8 Pro), it is sometimes cheaper to buy a new phone than to repair the touchscreen. Compare the cost of repairs to the price of a used model on an Avito or Yule.

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In Xiaomi flagships (such as the Xiaomi 14), the touchscreen and display are often sold only as a collection. Replacing a single sensor may not be possible without buying the entire module.

How to extend the life of a touchscreen on Xiaomi: tips for care

To avoid breakdowns, follow simple recommendations:

• 🛡️ Use a protective glass - even a budget glass 0.3mm thick will reduce the risk of cracking when falling. - For Xiaomi with curved screens (e.g. Xiaomi) 11T) choose 3D-glass.
• 🧴 Apply an oleophobic coating that reduces finger marks and protects against microscraps, and Xiaomi offers this service for 300-500. ₽.
• 🚫 Avoid extreme temperatures - do not leave your phone in the sun or near the battery. -10°C +40°C.
• 💼 Carry your phone in your own pocket – keys, coins, and other hard objects can scratch the screen.
• 🔋 Do not use your phone while charging – overheating can damage the glue that fixes the touchscreen.

If you drop your smartphone frequently, consider models with protection. MIL-STD-810G (for example, POCO M5s Or the Redmi Note 12 Pro.+). They can withstand falls from a height of up to 1.5 meters.

It is also necessary to regularly update the firmware MIUI — In newer versions, touch processing algorithms are often improved. MIUI 14 added support for more accurate gesture recognition.

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If the touchscreen starts to "glutch" after getting moisture, immediately turn off the phone and put it in a bag of silica gel (from a shoe box) for 24 hours.

Frequent questions about Xiaomi touchscreens (FAQ)