Dead Pixel Finder
Identify screen defects by cycling through high-contrast solid colors.
Instructions:
- Press Space to cycle colors.
- Use ← / → arrow keys to navigate.
- Press F or use the fullscreen icon to enter Fullscreen Mode.
- Look for pixels that don't match the background color (Black, Bright, or wrong color).
- Clean your screen first to avoid mistaking dust for dead pixels.
- Tap the preview to cycle colors.
- Tap a color swatch to inspect that color.
- Use the fullscreen icon to enter Fullscreen Mode for better inspection.
- Look for pixels that don't match the background color (Black, Bright, or wrong color).
- Clean your screen first to avoid mistaking dust for dead pixels.
What is a Dead Pixel?
A dead pixel is a tiny dot on your screen that stays permanently black. This happens when a pixel in an LCD or OLED panel fails to receive power or signals correctly.
Unlike stuck pixels, which show a solid color (Red, Green, or Blue), dead pixels are usually a sign of a hardware defect that software cannot repair.
Who Should Use This Tool?
This tool is essential for gamers, designers, and professional editors who require perfect color accuracy and display integrity.
It is also highly recommended to run this test immediately after purchasing a new monitor, laptop, or smartphone to ensure you can return it within the warranty period if defects are found.
Common Mistakes When Testing
Testing with Dust
Many people mistake a tiny speck of dust for a dead pixel. Always clean your screen with a microfiber cloth before starting the test.
Ignoring Fullscreen
UI elements like browser bars can hide pixels at the edges. Always use Fullscreen mode (F key) for a comprehensive check.
One-Color Only
A pixel might look fine on black but fail on red. Cycle through all primary colors (R, G, B) and neutrals (W, B) to be certain.
Practical Examples
Example 1: Buying a New Monitor
You just bought a 4K gaming monitor. You run this test and find a black dot in the center while on the 'White' background. This is a dead pixel, and most manufacturers will replace the unit if it's within their 'dead pixel policy' limit.
Example 2: Second-hand Gear
Before buying a used laptop, open this page. If you see a bright red dot on the 'Black' background, that's a stuck pixel. You might be able to fix it using our Stuck Pixel Fixer.
Frequently Asked Questions
What is a dead pixel?
A dead pixel is a defective pixel that remains permanently black because it is no longer receiving power or signals.
Can a dead pixel be fixed?
True dead pixels (permanently black) are usually hardware failures and cannot be fixed with software. Stuck pixels (showing a solid color) can sometimes be revived.
How do I use this tool?
Enter fullscreen mode and cycle through solid colors (Red, Green, Blue, White, Black). Look closely for any dots that don't match the background color.
What is the difference between a dead pixel and dust?
Dust is usually on the surface and can be wiped away with a microfiber cloth. A dead pixel is inside the panel and will remain in the same spot regardless of cleaning.
Does one dead pixel justify a warranty claim?
Most manufacturers have a 'Dead Pixel Policy' that requires a minimum number of defects (usually 3 to 5) before they will replace the screen under warranty. Check your brand's specific policy.