About Dead Pixel Test
A dead pixel test fills the whole screen with one solid color so that faulty pixels stand out. This page goes full screen and cycles through red, green, blue, white, black, yellow, magenta, and cyan each time you click, and Esc exits. Look for dots that stay dark or keep one color on every background. The test only displays colors: it cannot detect or repair pixels, and it needs a browser with full screen support.
Questions about Dead Pixel Test
What is the difference between a dead pixel and a stuck pixel?
A dead pixel stays black on every color because it no longer lights up. A stuck pixel stays lit in one color, such as red or green, because one of its subpixels is permanently on. Stuck pixels sometimes recover, dead ones rarely do.
How should I prepare the screen for the test?
Wipe the screen first so that dust is not mistaken for a pixel fault, and set the display to its native resolution. Check each color slowly from edge to edge, since a single pixel is very small on a high resolution panel.
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