Stuck Pixel Test
Detect subpixels permanently stuck in an active state against pure black, dark gray, and complementary color backdrops.
Diagnostic Sequence Preview
This test automatically cycles through calibrated solid color surfaces.
What to Look For
Unlike dead pixels which stay black, stuck pixels remain energized and glow continuously in a single color channel (red, green, blue, cyan, magenta, or white). They are most visible on dark screens in a dim room.
- Glowing red, green, or blue specks on pure black and dark gray screens.
- Bright dots that stand out when watching dark video scenes or using dark mode.
- Frozen subpixels that fail to switch off when complementary colors are displayed.
- Clusters of bright subpixels in gaming monitors or OLED panels.
Display Preparation Tips
- 1Turn off the lights in your room to create a dark environment for high contrast.
- 2Set display brightness to 80-100%.
- 3Inspect each corner and center quadrant of the pure black canvas.
- 4Use the built-in Magnifier tool (press 'M') to examine subpixel arrangement.
Frequently Asked Questions
How can I fix a stuck pixel?
Stuck pixels can sometimes be unstuck by rapidly cycling contrasting color sequences (which stimulates the liquid crystal orientation) or gentle pressure with a microfiber cloth on LCD screens.
Why do stuck pixels glow in different colors?
Every display pixel consists of Red, Green, and Blue subpixels. If only the green transistor is stuck on, you will see a green dot; if Red and Blue are stuck, you will see magenta.
What is a Zero Bright Dot warranty?
Many monitor manufacturers offer Zero Bright Dot (ZBD) guarantees, replacing panels that have even a single stuck bright pixel within the initial return window.
Ready to Check Your Screen?
Launch full-screen diagnostics right now to verify pixel health, backlight uniformity, and color fidelity across your entire display.
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