A dead pixel occurs when all three sub-pixels are not functioning, resulting in a black dot on the screen. It is important to note that a pixel is composed of three sub-pixels - red, green, and blue - that light up to create different colors. Carefully inspect each color displayed on your screen, keeping in mind that a dead pixel will appear black and a stuck pixel will appear as a specific color. Next, set your screen to display a single color, either by using a dead pixel testing app or video. You can do this by gently wiping the screen with a soft cloth. Start by making sure your screen is clean, as dust or dirt can be mistaken for dead pixels. To test your screen for dead pixels, you will need to inspect it carefully using a solid color screen. You may find more information on the topic on our What is a dead pixel page. For instance, if both the blue and the green one are stuck, your pixel will be stuck on light blue. One, two, or all three sub pixels might be stuck and can’t turn off anymore.
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