DISPLAY
Dead Pixel Test
Select a color. Press ESC to exit.
Display / BROWSER TEST
Dead pixel and stuck pixel test
Inspect your screen using solid colors. Look for pixels that stay dark, stay bright or show the wrong color as you change the test color.
How to use this testYOUR RESULT → YOUR NEXT STEP
What does my result mean?
Choose what you observed. These explanations help you narrow down a problem; they are not an automatic hardware diagnosis.
QUICK START
How to use the dead pixel test
- Clean obvious marks from the screen so they are not mistaken for pixel defects.
- Choose a color to open the fullscreen test and inspect the display carefully.
- Press Escape or Exit, then repeat with the remaining colors. Check each monitor separately.
READ YOUR RESULTS
Understanding your results
White makes dark pixels easier to notice, black helps reveal bright pixels, and red, green and blue can expose subpixel differences. Inspection is visual: the webpage cannot automatically detect defects in the physical panel.
Dust, reflections and viewing angle can resemble defects. Check the same location across colors and viewing conditions. This test does not repair pixels or determine whether a display qualifies for a warranty claim.
Troubleshooting your dead pixel test
A dot looks like a dead or stuck pixel
Check the same location on white, black, red, green and blue. Change your viewing angle and rule out dust or reflections. This is visual inspection, not an automated defect count.
Fullscreen does not cover the whole monitor
Maximize the browser or use its fullscreen control if page fullscreen is unavailable. The fallback covers the webpage only. Inspect each display separately and avoid pressing on the panel.
Still stuck? Report a test problem. Do not include recordings or private device information.
Frequently asked questions
Can the test automatically count dead pixels?
No. A webpage can display colors but cannot observe physical defects in your panel. You need to inspect the screen yourself.
What if fullscreen is unavailable?
The color overlay still fills the webpage. Maximize the browser window, or use a browser that supports fullscreen to inspect more of the panel.