Screen Test Tool
Detect dead pixels, bright spots, and test color display quality
Test Modes
Preview
What is Screen Test?
Screen test tool helps you detect dead pixels, bright spots, and dark spots on your display. By showing solid colors, gradients, and grid patterns, you can easily identify abnormal pixels on your screen.
How to Use
- Select a test mode or click 'Enter Fullscreen Test' button
- In fullscreen mode, carefully observe all areas of the screen for abnormal bright or dark spots
- Use arrow keys or click buttons to switch between different test colors
- Press Esc to exit fullscreen mode
Keyboard Shortcuts
EscExit fullscreen
SpaceShow/hide controls
←→Switch test mode
0-9Quick color selection
Detection Tips
It's recommended to test in a dimly lit environment to better detect screen anomalies. White background can detect dead pixels (always-on black dots), black background can detect bright spots, and solid colors can detect color abnormalities.