Dead & Stuck Pixel Test
Inspect every subpixel on your monitor for dead (black) or stuck (single color) defects across solid color screens, with built-in rapid RGB stuck pixel revival flasher.
1. Select Color to Test
2. Stuck Pixel Revival Flasher
If you discover a stuck colored subpixel (red, green, or blue), click below to launch a rapid 60fps color flickering box. Drag and position the box directly over the stuck pixel for 10-20 minutes to exercise the liquid crystal.
How to Use This Test
- Click "Launch Fullscreen Test" to enter fullscreen mode.
- Click anywhere or press Spacebar to cycle through each solid test color (Black, White, Red, Green, Blue).
- Scan your screen from arm's length for any tiny dots that don't match the background color.
- Press the ESC key or double-click anywhere to exit fullscreen mode.
- If you find a stuck colored pixel, launch the Revival Flasher, drag the flashing box over the pixel, and leave it running for 10–20 minutes.
Dead Pixels vs. Stuck Pixels
Dead Pixels occur when a pixel's transistor fails completely, leaving it permanently unpowered. It appears as a tiny black speck on white and bright backgrounds. Stuck Pixels happen when a subpixel (Red, Green, or Blue) remains frozen in the open state, showing up as a persistent colored dot on black backgrounds.
How the Stuck Pixel Reviver Works
Liquid crystals in LCD displays can occasionally get mechanically or electrostatically "stuck" in one orientation. Rapidly cycling primary colors at 60 FPS exercises the liquid crystals and can stimulate them back into normal responsive operation.
Is It a Dead Pixel or Just Dust?
To tell dust from a dead pixel, gently shift your head from side to side. Surface dust sits on the outer glass layer and creates a slight parallax shift relative to the pixels underneath. A dead pixel is embedded directly in the display panel and will never shift position.