What is a Dead Pixel?
Definition
A dead pixel is a non-responsive sub-pixel that remains permanently black, failing to emit light across all RGB channels due to hardware failure. Unlike stuck pixels, dead pixels cannot be repaired and typically indicate physical damage to the LCD or OLED display panel.
Types of Pixel Defects
Dead Pixel
Permanently black, unresponsive to any color input. Cannot be fixed.
Stuck Pixel
Displays incorrect color (red, green, or blue). May be fixable with color cycling.
Hot Pixel
Always bright white or colored, visible on dark backgrounds.
Backlight Bleed
Light leaking from edges of the screen, visible on dark scenes.
Causes
- • Manufacturing defects in the display panel
- • Physical impact or pressure on the screen
- • Age-related deterioration of pixel transistors
- • Electrical damage from power surges
- • Extreme temperature exposure
How to Test
Use our dead pixel test toolto cycle through solid color backgrounds. Dead pixels will appear as tiny black dots that do not change regardless of the background color.