Broken pixels on a Xiaomi TV screen are a problem that is hard to spot when you first turn on, but can ruin the experience of watching movies or games over time. Even one dead pixel (permanently black) or got stuck (colored, non-changing shade) can be annoying, especially if it is in the center of the screen. In this article, we will discuss how to check the matrix of the Xiaomi TV for pixel defects using built-in tools, online services and third-party applications - without disassembling the device and special equipment.
The manufacturer does not always specify the permissible number of broken pixels in the specifications, but by unspoken standards. ISO 13406-2 class-screen II (Most TV stations are allowed before 2 bright 2 If there are more defects, it is a reason to return under warranty. TV 4S/5/5X/Q1/Q2 or another model immediately after purchase, as some pixels may only appear in certain colors.
Why Broken Pixels Are Coming In and How to Recognize Them
A pixel is the minimum point of a screen consisting of three subpixels (red, green and blue) and if one of them fails, the dot stops displaying colors correctly.
- 🔌 Production marriage is the most common reason for new TVs, and matrix defects can be invisible on a standard test image in a store.
- ⚡ Voltage swings – Power surges sometimes damage pixel controllers, especially if the TV is not connected through a network filter.
- 🕹️ Long-term static load – for example, if the channel logo hangs on the screen for years, the pixels “burn out” (relevant to the screen). OLED-matrix).
- 🚀 Mechanical damage – impacts or pressure on the screen can disrupt the structure of liquid crystals (in the case of a slug). LCD-matrix).
Recognising broken pixels is simple:
- 🖤 A dead pixel is always black, doesn’t glow against any background.
- 🟥🟩🟦 Hanging pixel – burns in red, green, blue or a combination of them (for example, yellow), without changing color when changing the picture.
You can see bright pixels on a dark background, you can see dark pixels on a light background, so you need to use test patterns with uniform colors to fully verify them.
Method 1: Built-in self-testing menu (for Android TV models)
Many Xiaomi Android TVs (such as the Mi TV 4A/4S/5 series) have a hidden screen screen diagnosing menu to open:
- Turn on the TV and wait for the main screen to load.
- On the remote, press sequentially: Settings → Device → About TV → Click 5 times on the item "Model" After that, the Service Menu menu will open.
- Go to Panel Test or Screen Test (the name may vary depending on the firmware version).
- Select the Color Test option - the screen will alternately be filled with red, green, blue, white and black colors.
Look carefully at the screen at each stage. If you notice points that are different in color from the background, these are broken pixels. To exit the test mode, press Back or Home on the remote.
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If Service Menu doesn’t have a Panel Test item, try upgrading your TV firmware to the latest version — sometimes the manufacturer adds diagnostic tools to new builds.
⚠️ Warning: Do not change other settings in Service Menu unless you are sure of their purpose. Incorrect settings can cause the TV to crash.
Method 2: Online services for checking pixels
If there is no built-in test or it is not informative enough, use online tools that work through the TV browser (for example, Google Chrome or the built-in Mi Browser).
- 🌐 JScreenFix – allows you not only to test pixels, but also to try to “wake up” the hung with the help of flickering colors.
- 🎨 Lagom LCD Test – a set of tests to check contrast, gradients and broken pixels.
- 🔍 Background color What pixels are visible Note Black Bright (red, green, blue) Best visible in a dark room White Dark (black or gray) You can use a flashlight to illuminate at an angle Red Green and blue subpixels Defects will look like black or dark purple dots Green Red and Blue Subpixels Black dots on green background - sign of dead pixels Blue Red and green subpixels Most noticeable yellow and purple lights