Dead Pixel Test

Inspect solid colors and save a self-reported suspect-pixel count, location, and pattern notes without a severity grade.

Go to test controls

This check opens a focused test surface. You can return with Escape. Review what this browser test can and cannot measure.

Before you start

  • Clean the screen so dust is not mistaken for a pixel issue.
  • Use your normal viewing distance and dim distracting room reflections.
Step-by-step instructions

How to run this check

  1. Open the Dead Pixel Test
  2. Click "Start Test" to enter fullscreen mode
  3. Press Space or click to cycle through 8 solid colors (White, Black, Red, Green, Blue, Yellow, Magenta, Cyan)
  4. Look carefully at each color and note any pixel that does not match its surroundings
  5. Press ESC to exit, then enter your suspect-pixel count or not assessed and record the location and colors; the count is not a severity or warranty grade

Click to start the test in fullscreen. Use color buttons or arrow keys to cycle through colors. Press ESC to exit.

👁️ What You're Looking For

No Obvious Issue Noted

Solid Red Reference

No mismatch is visible in this illustrated sample

❌ Dead Pixel Example

Red Background

Black spots that stay black on colored backgrounds

⚠️ Stuck Pixel Example

Blue Background

Colored spots that don't change with background

Classify only what you can see

Observation Controlled recheck Record
Dark Confirm the same point stays dark across several backgrounds. Physical location and every color checked
Fixed color Confirm the point keeps the same color while the background changes. Observed color and contrasting backgrounds
Unusually bright Recheck on dark and colored backgrounds at the same brightness. Location, brightness setting, and patterns

Do not press, rub, or heat the panel. If the point is repeatable, compare your notes with the pixel-policy evidence guide for the exact product and region.

What this browser test can tell you

Can help you check

  • Visual inspection with a self-reported count and location notes for suspect pixels.

Cannot measure

  • This test cannot automatically classify pixels or determine warranty eligibility.

Interpret this observation

  • Record the location and colors on which each suspect pixel stays dark, bright, or fixed. A raw self-reported count is not a severity grade or warranty threshold; not assessed is not zero.
  • Exact pixel classification requires magnification and calibrated camera or microscope inspection.
Setup and sources

Recommended setup

  1. Clean the screen, use its native resolution, and inspect from a comfortable distance.
  2. Check every solid-color pattern and note each suspect location for the result form.

Sources

Methodology reviewed: