How to check the touchscreen on Xiaomi smartphone: a complete guide with tests and tips

Touchscreen is one of the most vulnerable elements of Xiaomi’s smartphone, especially if the device often falls or comes into contact with moisture. Touchscreen malfunctions vary from random “ghost” touches to complete lack of response to touch. In this article, we will examine all the available ways to check the health of the sensor, from hidden service menus to professional diagnostic applications.

It's important to understand that touchscreen problems aren't always about physical damage, sometimes software failures, application conflicts, or even system incorrect settings, and we'll show you how to distinguish hardware from software failures so you don't waste time on unnecessary manipulation, and if you're planning to buy used Xiaomi, these methods will help you avoid cheating when checking the device.

1. Quick touchscreen check without apps

Before you delve into complex tests, perform basic manipulations that will help identify obvious problems:

• 📱 Swipe your finger across the screen to see if there are any dead zones (the areas where no touch is recorded.
• ✏️ Use a stylus or plastic shoulder blade — some touchscreens respond better to thin objects than to the fingers.
• 🔄 Try to reboot your smartphone - sometimes temporary sensor failures disappear after the reboot.Push and hold the power button, then select Reboot.
• 👆 Multi-touch test: touch the screen simultaneously with two or three fingers in different places, and if the sensor does not recognize multiple touches, this may indicate damage to the controller.

If you find problems at this point (e.g., the screen only reacts to a portion of the touches or clicks on its own), move on to a deeper diagnosis. If everything works well, it is not a guarantee that there are no hidden defects. For example, some Xiaomi models (e.g., Redmi Note 10 Pro or POCO X3 Pro) have problems with “drift” of touches when the screen is heated, which can only be detected during prolonged use.

2. Built-in service tests on Xiaomi (without root)

The manufacturer has provided hidden tools for diagnosing hardware components, including touchscreen, which don't require superuser rights or special knowledge to run, just know the right combination.

The method works on most Xiaomi, Redmi and POCO models (except for the newest HyperOS devices, where menus may differ).

1. Open the phone (calling) application.
2. Enter the combination: ##4636### or ##6484## (on some firmware).
3. In the menu that appears, select Testing → Touch Screen Test (or a similar item, such as the Single Touch Test).
4. Follow the instructions on the screen – usually draw a line on the display or click on the points that appear.

If the service menu does not open, try an alternative method:

Settings → About Phone → MIUI Version (click 5-7 times in a row until the message “You became a developer” appears) → Return to “Settings” → Additional → For developers → Diagnostics → Equipment Test

Make sure that the battery is > 20%

Close all background applications

Remove the protective film/glass (if any)

Use the original cable (if the test requires a PC connection)-->

In the test results, pay attention to:

• 📊 Response delay – if more than 100ms passes between touch and reaction, it is a sign of malfunction.
• ❌ Missed touches – if the test shows you missed more than 5% of points, the sensor needs repair.
• 🔥 "Hot areas – areas where false touches are recorded (often occurring after moisture is ingested).

⚠️ Note: On HyperOS devices (e.g. Xiaomi 14 or Redmi) K70) Standard service codes may not work, in which case use third-party apps or connect your smartphone to a PC with Mi installed. PC Suite to run diagnostics.

3. Applications for deep diagnostics of touch screen

If the built-in tests don't give a complete picture or are not on your model, install specialized utilities that allow you to check not only the basic functionality, but also parameters such as:

• Sensitivity to weak / strong presses;
• Recognition of gestures (swipes, multi-touch);
• Stability of operation when changing the temperature of the screen.

The best free apps for Xiaomi:

Examples of Touch Screen Test:

1. Start the application and select Multi-Touch Test.
2. Touch the screen with all your fingers at the same time – the app will show how many touches are recognized.
3. Go to Touch Visualizer, where all recorded touches will be displayed in real time (useful for identifying "ghost" taps).
4. In the Pressure Test section, check how the sensor responds to different pressures.

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If the app shows false touches in the same place, the touchscreen plume or controller is probably damaged. AMOLED-screens (e.g. Xiaomi) 13T) This problem often occurs after the display is replaced.

4. Checking the touchscreen through the PC (for advanced users)

If your smartphone doesn’t respond to touch at all or you suspect a controller problem, connect it to your computer for diagnostics, a method that requires an ADB (Android Debug Bridge) and basic command-line skills.

Instructions:

1. Download and install Platform Tools (includes adb).
2. Turn on your smartphone Debugging over USB (Settings → About Phone → MIUI Version (click 7 times) → For developers → Debugging over USB).
3. Connect your device to your PC via USB and enter: Adb devices Make sure your Xiaomi appears in the list.
4. Run the sensor test with the command: adb shell getevent -l Touch screen will be displayed as coordinates and event codes. If nothing appears when touching, the sensor is faulty.

For a more detailed analysis, use the command:

adb shell dumpsys input

It will display all the input devices connected, including the touchscreen. touch_dev — If there are errors (such as status)=3), This indicates a hardware problem.

⚠️ Note: On devices with a blocked bootloader (bootloader) some ADB-If you see a no permissions message, try unlocking the bootloader through the official Xiaomi tool.

5. How to Identify Hidden Touch Screen Defects

Some malfunctions only occur in specific conditions, and to detect them, do stress tests:

• 🌡️ Overheating Test: Run a resource-intensive application (e.g. Genshin Impact or benchmark) 3DMark). Through 10-15 Check the sensor response for a minute – if false touches or sticks appear, the controller is having a problem.
• ❄️ Cold test: Place your smartphone in the refrigerator (not freezer!) for 5 minutes. After extraction, immediately test the touchscreen - if it temporarily stops working, the fault is a plume defect.

Moisture sensitivity test

1. Bring your smartphone to the source of steam (for example, over a cup of hot water).
2. If the screen starts to “click” on its own, then condensation has accumulated under the sensor.

The cost of repairing the touchscreen on Xiaomi depends on the model:

Before you bring your smartphone to the service, try resetting to factory settings (Settings → About Phone → Settings Reset). This will help to eliminate software failures. If the problem remains, contact the authorized Xiaomi service center (the list can be found on the official website).

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Don’t try to disassemble your smartphone for touchscreen repair! On most Xiaomi models, the screen is glued to the body, and with unprofessional intervention, you can damage the plumes or battery.

7. Prevention of Touch Screen Failures

To extend the life of the touch screen, follow simple rules:

• 🛡️ Use a protective glass – it not only prevents scratches, but also reduces the load on the sensor when falling.
• 🚿 Avoid getting moisture – even if your Xiaomi has protection IP53, Condensate can penetrate the screen and cause corrosion of contacts.
• 🔋 Do not use your smartphone while charging – overheating of the battery negatively affects the operation of the touch screen controller.
• 🧴 Clean the screen correctly – use a microfiber wipe and special liquids (without alcohol!).
• 📦 Keep the device in a case – even a thin bumper will reduce the risk of damage when falling.

Try lowering the graphical settings in the game or setting an FPS limit through Game Turbo.