What is a dead pixel?

A dead pixel remains black; a stuck pixel displays a single color. Solid-color fullscreen tests help reveal them.

How do I run the test?

Open the Dead Pixel Test and start the color cycle. Inspect the screen at each color, especially corners and edges.

Cycle solid colors in fullscreen to reveal dead or stuck pixels. Use manual color buttons or automatic cycle with adjustable interval.

Interval (ms):

Manual color buttons are available in the overlay once you open fullscreen.

Click Start Color Cycle to open fullscreen and begin cycling white, black, red, green, and blue.
Inspect the screen at each color; use a magnifier for small defects.
If you find a pixel, note its location and contact your device manufacturer for warranty options.

Target keywords: dead pixel test, stuck pixel test online, pixel checker.

Short answer: Use the color cycle to reveal pixels; stop the cycle to inspect a single color.