How to self-check pixels on Xiaomi devices: from smartphones to TVs

The screen is a key element of any Xiaomi device, whether it's a Redmi Note 12 smartphone, a Pad 6 tablet or a Mi TV Q2. Even a single broken pixel can ruin the experience of use, especially if it's located in the center of the display. But how do you tell the real problem from a temporary artifact? And why do some devices "heal" themselves, and on others remain forever?

In this article, we'll look at 5 proven screen diagnostics, from built-in tests to professional apps, how to identify not only dead pixels (which never glow), but also "hangs" (constantly burning in red, green or blue), and when to sound the alarm, and when it's enough to just restart the device, all instructions are adapted for MIUI and HyperOS, taking into account the features of the latest updates in 2026.

1.Integrated display test in Xiaomi: hidden codes and menus

The manufacturer has put hidden screen diagnostic tools in Xiaomi's firmware, which don't require third-party apps to be installed, and they work even without an Internet connection, and the key is to know the right sequence of actions.

For smartphones and tablets:

1. Open the Phone app.
2. Enter the combination ##6484## (for models on MIUI 14+) or #284## (for older versions).
3. Select Display Test or Screen Test.
4. Flick through the color fills (black, red, green, blue, white), carefully examining the screen for anomalies.

For Mi TV and Redmi TV:

• 📺 Press the Menu button on the remote. + Volume Down for 5 seconds.
• 🔍 In the service menu, select Picture Test.
• 🎨 Use volume buttons to switch between color patterns.

⚠️ Note: On some models (e.g, POCO F5 or Mi 11 Ultra, hidden codes may not work due to HyperOS security policy, in which case use alternative methods from the following sections.

2. Applications for checking pixels: top-3 Android utility

If the built-in tests don't give you the full picture, specialized applications come to the rescue, offering advanced diagnostic modes, including subpixel shift checks, gradients, and smooth color transitions, and here are three of the most reliable tools:

How to use:

1. Install one of the applications (we recommend Screen Test for basic verification).
2. Run the test on a black background – this is the easiest way to detect “hot” pixels.
3. Switch to a white screen and view the matrix from different angles (sometimes defects are only visible in side lighting).
4. Use Color Gradient mode to check for smooth transitions – sharp color jumps can indicate problems with subpixels.

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If you check. OLED-screen (for example, on Xiaomi 13 Pro or Mi) TV OLED), And look at areas that have a permanent static image, like navigation bars, and this is where pixel burnout is most common.

3.Pixel check on Xiaomi TVs: nuances and life hacks

Xiaomi TVs require a special approach due to the large diagonals and specificity of the matrix (VA, IPS, OLED). Here conventional smartphone applications will not work – you need either built-in tools or external devices.

Method 1: Through the Service Menu

• 📺 Turn off the TV, then press on the Menu remote control. + Volume Up.
• 🔧 Turn on the TV, holding the buttons until the service menu appears.
• 🎨 Select Panel Test → Color Uniformity.
• 🔍 Look at the screen for uneven spots or points.

Method 2: With the help of USB-flash-drive

Download the Mi TV test patterns on your computer (.jpg image archive) unpack the files on a flash drive, paste it into the TV and open it through the File Manager. Flick through the images with the same colors.

⚠️ Attention: OLED-Xiaomi TVs (e.g. Mi TVs) TV Master OLED) Avoid long-term display of static test images, which can accelerate the burnout of pixels.

Make sure the TV is warm (working ≥30 minutes)| Turn off image enhancement modes (HDR, Dynamic Contrast)| Use a full battery remote | Check in a dark room for better defect visibility-->

4.How to distinguish a broken pixel from software artifacts

Not every defect on the screen is a physical breakdown of the matrix, and users often confuse broken pixels with:

• 🖥️ Artifacts of the driver - appear after the update MIUI/HyperOS and disappear after rebooting.
• 📱 App crashes – for example, “strips” in games or video players.
• 🔋 Overheating of the processor - on Snapdragon 8 Gen 2 (in Xiaomi) 13T Pro) may cause screen flickering.
• 🔌 Cable problems (relevant to Mi) TV video-module).

How to perform differential diagnosis:

1. Restart the device in Safe Mode (for smartphones: hold the power button → Safe Mode). If the defect is gone, the software is a problem.
2. Check it in another app, for example, if the pixel is only visible on YouTube, but not in the gallery, it's a bug.
3. Connect to another signal source (for TV). If the artifacts are left when connected via HDMI, USB-C and Wi-Fi Direct, the matrix is to blame.

A critical sign of a physical defect: The pixel is visible in all colors (including the black background) and does not disappear after resetting.

5 What to do if you found a broken pixel: warranty and repair

Do not panic, not all pixels are repairable under warranty.

Step 1: Check the terms of the guarantee

• 📄 Xiaomi has a rule of “3-5 bit pixels” – if there are fewer, it is not considered a marriage.
• 🔍 For OLED-Normally, even 1 constant pixel can be the basis for replacing the screens.
• ⏳ On TVs, the warranty for the matrix is often 1 year, on smartphones - 12-24 months (depending on the region).

Step 2: Try to unlock the pixel

Sometimes, the pixels that are stuck can be reanimated software.

1. Install the JScreenFix app (available on the official website).
2. Run the test for 10–30 minutes – the program blinks quickly with colors, trying to “wake up” the pixel.
3. Repeat the procedure 2-3 times with breaks.

Step 3: Contact the service

If the pixel is left, contact the authorized service center Xiaomi.

• 📄 Check or guarantee card.
• 📱 Charging device ≥50%.
• 📸 Photo of the defect (take a picture on another phone to confirm the problem).

⚠️ Warning: Don't try to disassemble the device yourself, it voids the warranty, even to replace the screen plume with a new one. POCO X5 Pro requires special equipment for calibration of the matrix.

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Nana OLED-screens (for example, in Xiaomi) 12S Ultra) Broken pixels often appear due to static interface elements (such as notification panels). To reduce the risk, enable the option “Switch pixels” in the screen settings (Settings) → Display. → Additionally. → Pixel shift OLED).

6.Prevention: How to avoid broken pixels

It's impossible to completely prevent matrix defects, but you can significantly reduce the risks. OLED-screens that are subject to burnout.

For smartphones and tablets:

• 🔄 Turn off Always-On Display overnight (even on Xiaomi 14 with improved displays) OLED-panel).
• 🌡️ Avoid overheating – do not leave your phone in direct sunlight or on a charge in a case.
• 🔋 Do not discharge the battery "to zero" - this can cause voltage surges that are harmful to the matrix.
• 🎮 Use dark themes in games and apps (e.g., in games and apps) MIUI Launcher or Google Chrome).

For TVs:

• 📺 Set your sleep timer – don’t leave your TV on all night with a static channel logo.
• 🎨 Turn off the “Dynamic Contrast” modes – they increase the load on the backlight.
• 🔌 Use network filters – voltage surges most often disable the Mi matrix TV.

On HyperOS devices (such as the Xiaomi SU7 or Mi Pad Pro), turn on the Adaptive Brightness option, which automatically adjusts the backlight, reducing the risk of burnout.

FAQ: Frequent questions about pixel checks on Xiaomi