DeadPixelTest.org is the simplest way to check if you have any dead pixel on your screen. Our website offers an easy and convenient way for you to test your screen for dead pixels. Our test will display various colors and patterns on your screen, allowing you to identify any dead pixels that may be present. Pick a color to go full screen and follow the instructions. If you're browsing from a smartphone or a tablet, please run one of our dead pixel test videos instead.
Run a dead pixel test on DeadPixelTest.org, the simplest way to check your screen for dead pixels.
Test your screenVideo test for Smartphones
To run a dead pixel test on DeadPixelTest.org, simply follow these steps:
Simply put, a pixel is a dot on your screen that turns on or off and changes color according to the image that your device wants to display. In reality, a pixel is made of three sub pixels - one red, one green and one blue. Each of them can light up to a certain percentage to allow your pixel to display every color it needs. For instance, if all three sub pixels are lit to full power, your pixel will show white. If all are turned off, it will display black. If only the red sub pixel and the blue one are lit to full power, your pixel will show pink…
Sometimes, it will occurs that pixels can malfunction. Once again, in reality, pixel malfunctions are caused by sub pixels defects. One, two and even all three of them can be damaged. Sub pixels can either be completely broken so that they don't light up anymore, or they can be stuck and permanently lit. Is thus necessary to distinguish several cases:
You may find more information on the topic on our What is a dead pixel page.
To test your screen for dead pixels, you will need to inspect it carefully using a solid color screen. Start by making sure your screen is clean, as dust or dirt can be mistaken for dead pixels. You can do this by gently wiping the screen with a soft cloth.
Next, set your screen to display a single color, either by using a dead pixel testing app or video. 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.
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. A dead pixel occurs when all three sub-pixels are not functioning, resulting in a black dot on the screen. A stuck pixel occurs when one or more sub-pixels are not functioning properly, resulting in a dot stuck on a specific color.
Once you have completed the test, you can compare your results to others to determine if you have a high number of dead pixels or if your screen is functioning properly.
First, it is necessary to say that you have way more chances to fix stuck pixels than dead pixels. Stuck pixels can technically still light up, while dead pixels seemingly cannot. In both cases, there are a few things worth trying.