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Panel & Backlight

Dead Pixel Test

Full-screen solid colors to find dead, stuck, and bright pixels.

How to use

  1. 1Set your display brightness to maximum and clean the screen.
  2. 2Click Start to enter full-screen, then use ← / → or tap to change colors.
  3. 3Scan each solid color slowly across the whole panel.
  4. 4A dot that stays black on every color is a dead pixel; a dot stuck on one color is a stuck pixel.
  5. 5Press Esc to exit. Found one? Try the stuck-pixel flash mode to revive it.

FAQ

What's the difference between a dead and a stuck pixel?

A dead pixel stays black on every color because it receives no power. A stuck pixel is permanently lit in one color (red, green, or blue) and can sometimes be revived by rapidly flashing colors.

Can I fix a stuck pixel?

Sometimes. Rapidly cycling colors over the stuck area, or gently massaging it, can unstick it. Dead pixels usually cannot be fixed in software.

Does this work on phones and TVs?

Yes. It works in any modern browser on phones, tablets, laptops, monitors, and smart TVs.

Tips

  • Clean the screen first — a speck of dust looks exactly like a dead pixel.
  • View each color from ~30cm away so a single off pixel actually stands out.
  • Found a stuck (not dead) pixel? Leave a fast color flash running over it for 10–20 minutes to try to revive it.

Related tests

Backlight BleedReveal LCD backlight leakage and IPS glow in a dark room.Brightness Uniformity50% gray field and a 9-zone grid to spot uneven backlighting.Blooming TestA bright object on black to judge local-dimming halos.Burn-in TestFull-screen fields and a checkerboard to reveal OLED burn-in.

Related guides

Learn more about what this test reveals and how to act on the results.

The Complete New-Device Screen Test ChecklistA 10-minute routine to inspect any new laptop, monitor, phone, or TV before the return window closes.How to Test a Monitor Before (and Right After) BuyingWhat to check in the store and at home so you don't keep a monitor with dead pixels, bleed, or the wrong refresh rate.How to Test a Laptop Screen for Dead PixelsA step-by-step guide to checking a new or used laptop display for dead and stuck pixels before it's too late to return it.How to Fix a Stuck Pixel (4 Methods That Actually Work)Flashing, the pressure method, and tapping — practical ways to revive a stuck pixel, plus when to stop trying.