A simple fullscreen display test tool that cycles through colors and checkerboard patterns to detect monitor imperfections and pixel issues. A must-use tool to check for dead pixels, backlight bleed, and screen uniformity problems.
- Launch the program → it starts fullscreen
- Press any key to switch to the next test pattern
- Press ESC to exit
- Black
- White
- Red
- Blue
- Green
- Gray (RGB 128,128,128) - best for detecting panel imperfections
- Lime
- 10 × 5 checkerboard
- 10 × 5 checkerboard (inverted)
- 20 × 10 checkerboard
- 20 × 10 checkerboard (inverted)
- Dead or stuck pixels
- Backlight bleed
- Brightness uniformity issues
- Dirty screen effect
- Scaling or sharpness problems