Dead Pixel Test

Cycle solid colors to find stuck or dead pixels.

How to use

1. Go fullscreen with F.
2. Cycle through solid colors with the arrow keys or controls.
3. Look closely for dots that stay a different color or stay black.

Good for

• Inspecting a new monitor, phone or laptop
• Checking a used screen before buying
• Gathering evidence for a warranty claim

Questions

Can this fix dead pixels?

It only finds them. A stuck pixel may recover; a dead pixel usually does not.

What is the difference between a dead and a stuck pixel?

A dead pixel stays black on every color. A stuck pixel stays on one color, such as red, while the rest change.

How do I test properly?

Go fullscreen, step through all colors, and look closely at the whole screen in a dim room. Clean the screen first so dust is not mistaken for a pixel.

Can I fix a stuck pixel?

Sometimes gentle pressure or time fixes a stuck pixel. Dead pixels usually need a repair or replacement. Check your warranty.

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