Question 1

What is a dead pixel?

Accepted Answer

A dead pixel is a pixel on your display that is permanently off (black) and no longer receives power. Dead pixels appear as small black dots on light-colored backgrounds and cannot be fixed through software methods.

Question 2

What is a stuck pixel?

Accepted Answer

A stuck pixel is a pixel that is permanently lit in one color (often red, green, or blue). Unlike dead pixels, stuck pixels may sometimes be fixed by running pixel-exercising patterns or gentle pressure. Stuck pixels appear as bright dots on dark backgrounds.

Question 3

How do I use this tool?

Accepted Answer

Click "Start Test" to enter fullscreen mode. The screen will display solid colors and patterns. Use arrow keys, spacebar, or tap the screen to cycle through each test. Look closely for any pixels that don't match the displayed color.

Question 4

Can this tool fix dead or stuck pixels?

Accepted Answer

This tool is designed for detection only, not repair. While some stuck pixels may respond to rapid color cycling, dead pixels are a hardware defect and cannot be fixed through software. If you find defective pixels on a new display, contact the manufacturer about warranty replacement.

Question 5

How do I tell the difference between a dead pixel and dust?

Accepted Answer

Dead or stuck pixels remain in the same screen position regardless of what's displayed. Dust particles on the screen surface will appear differently at various angles and can be wiped away. Try cleaning your screen first.

Question 6

Is one dead pixel a defect?

Accepted Answer

Most manufacturers consider a small number of dead pixels (typically 3-5+) to be within acceptable limits, especially on high-resolution displays. Check your manufacturer's dead pixel policy to understand their warranty terms.

Question 7

Does this work on phones and tablets?

Accepted Answer

Yes. The tool works on any device with a web browser. On mobile, tap the left or right side of the screen to navigate. For best results, maximize screen brightness.

Question 8

What are the patterns for?

Accepted Answer

Patterns like checkerboards and lines help identify stuck pixels that might be harder to see on solid colors. They can also reveal issues with specific rows or columns of pixels.

FAQ