Preparation Before the Test (Recommended)
- Gently clean the screen with a microfiber cloth (dust or smudges may cause false positives).
- Dim ambient light; set screen brightness to 80%+.
- Use full screen mode in your browser and disable color adjustments like “true tone” or “auto brightness.”
- Keep your device steady and look closely from a short distance during the test.
How Does the Dead Pixel Test Work?
This tool fills the screen with solid color surfaces (black, white, red, green, blue, gray), gradient, and grid patterns.- Black/White: bright or dark spots are easily visible.
- R/G/B: stuck pixels glowing in a single color appear quickly.
- Gradient/Grid: useful for unevenness, clouding, or line artifacts. Automatic color transition available — you can pause/resume and mark any suspicious point.
How to Interpret the Results?
Bright spot on black screen → likely a stuck pixel.
Spot glowing on R/G/B screen → stuck pixel.
Spot remains black on all screens → likely a dead pixel.
What does a dead pixel look like?
Will enter full-screen mode.
Left: previous • Middle: pause/resume • Right: next
What is a Stuck Pixel?
A stuck pixel occurs when one of the sub-pixels (red/green/blue) remains on, causing the pixel to show a single color. A dead pixel stays dark or black; a stuck pixel usually appears red, green, blue, white, or bright.- Stuck pixels can sometimes recover through rapid “flashing” patterns.
- Dead pixels are hardware defects; software cannot fix them.
Repair Your Screen
Will enter full-screen mode.
Place the RGB box over the stuck pixel and wait for
a while.
Check if the pixel has recovered.
If not, try again.