16kpixel

What is a Dead Pixel?

A simple guide to identifying and testing for screen defects.

A dead pixel is a hardware defect on a display where a single pixel fails to receive power, resulting in a permanent black dot. Unlike the rest of your screen, this pixel cannot change color or brightness.

Types of Pixel Defects

Not every "bad" pixel is actually dead. There are three primary categories:

  • Dead Pixel: Permanently off. It appears as a black speck regardless of what is on the screen.
  • Stuck Pixel: Frozen on a specific color (Red, Green, or Blue). These can sometimes be fixed with software.
  • Hot Pixel: Permanently white. This usually indicates a transistor that is always "on."

Interactive Dead Pixel Checker

Use the tool below to cycle through solid colors. Look closely for any dots that don't match the background.

Dead Pixel Test
Identify stuck or dead pixels by cycling through solid primary colors.
Current: White

Pro Tip: Use the arrow keys to cycle colors in fullscreen mode. Look closely for any dots that don't match the background color.

Can you fix a dead pixel?

True dead pixels are physical hardware failures and usually cannot be fixed by software. However, stuck pixels can often be "massaged" back to life by rapidly cycling colors, which can unstick the liquid crystal.

Pro Tip: If you find a dead pixel on a new monitor, check your manufacturer's "Pixel Policy." Most brands require 3-5 dead pixels before they will authorize a warranty replacement.