Dead Pixel Test
Professional dead and stuck pixel detector. Cycles through colors to find defective pixels on your screen. Works on all devices with instant fullscreen mode.
How to Use
- 1.Click the color display above or press 'F' to enter fullscreen mode
- 2.Press 'A' to auto-cycle through colors, or SPACE to manually advance
- 3.Look for pixels that don't change color or stay the wrong color
- 4.Press 'Escape' to exit fullscreen when finished
Understanding Dead vs Stuck Pixels
❌ Dead Pixel
Always black/dark on all colors. The pixel is completely non-functional and typically cannot be fixed. Usually covered by warranty if there are multiple dead pixels.
⚠️ Stuck Pixel
Stays one color (often red, green, or blue) regardless of screen content. May be fixable using the Pixel Fixer tool.
✅ Hot Pixel
Always bright/white. Less common than dead or stuck pixels. May be covered by warranty.
Frequently Asked Questions
How many dead pixels are acceptable?
Most manufacturers allow 3-5 dead pixels before warranty replacement. Premium displays often have stricter policies. Check your specific warranty terms.
Can stuck pixels be fixed?
Stuck pixels can sometimes be fixed using rapid color cycling. Try our Pixel Fixer tool for 10-30 minutes. Success rate is around 50-60%.
Is one dead pixel noticeable?
Depends on location and usage. Dead pixels in the center are more noticeable than edges. On high-resolution displays (4K+), single pixels are barely visible during normal use.