Bad Pixel Test

Bad or defective pixels are dots of digital panel (screen, sensor, matrix) that are not performing as expected. Dead pixel never shows light, it is usually black. Stuck pixel always shows some light (red, blue or green), when the device is active.

At first, switch your browser into full-screen mode (Press F11 key, ^⌘F combination or use the menu) to verify every pixel of your display.

Wipe dust and dirt off the screen using a serviette or a piece of cloth. Use different color modes (tap, click or press a space bar) to find defective pixels.

Black
White
Red
Green
Blue

Note: F11 or ^⌘F toggles Full-Screen mode On and Off. Spacebar or Enter key switches the color mode.