Dead Pixel Test
Inspect your display for dead or stuck pixels using solid colors.
Before you start
Use your normal display brightness. Inspect each color at a comfortable distance, then look more closely at any dot that stays in the same place. Cycle through all five colors.
Next / Previous or arrow keys change color. Tap or click the plain surface for the next color. Hide controls for a clear view; tap to recover them, or press H or Tab. Exit with the Exit button or Escape.
How to use this test
- Use normal brightness, choose Start test, and compare all five solid colors.
- Look for a dot that stays at the same screen location. Compare light, dark, and primary-color backgrounds so it does not blend into one color.
- Hide controls for inspection, recover them with Tab or H, and Exit or Escape when finished. Keep the check brief.
Want to compare this with timing, colors, and motion in one session? Run the Complete Monitor Test.
What to look for
A dead pixel stays dark because it does not produce the expected light. A stuck pixel or subpixel stays bright or fixed in a color. White can reveal dark dots; black can reveal bright dots; red, green, and blue can reveal individual color-channel problems. Compare a suspicious spot across the sequence and check that it is not dirt on the screen.
Know the limitations
Inspection is manual. This page cannot read individual physical pixels, confirm a hardware fault, or repair one. Browser scaling, panel layout, display processing, and dirt can affect what you see. For a persistent concern, consult your display manufacturer’s pixel policy.
Before calling a dot a pixel defect
Check for dirt or reflections and compare a different image. Clean only as the display manual permits; do not press the panel. Record the dot's position and which backgrounds reveal it. A persistent observation should be checked against the manufacturer's policy for that model and region.
Common questions
Can this automatically find or fix a dead pixel?
No. The colors help you inspect the panel by eye. There is no automatic detection or repair, and flashing repair patterns are not part of this test.
Why should I check all five colors?
A dot may blend into one background. Comparing white, black, and the three primary colors makes dark, bright, and fixed-color dots easier to notice.