Hardware Test

Updated

Dead Pixel Test

Cycle through black, white, red, green, blue, yellow, cyan, magenta, and gray full screen, and look for any dot that doesn't match.

Opens full screen. Click, tap, Space, or Right Arrow for the next pattern, Left Arrow to go back, Esc to close. Patterns change only when you ask, with no flashing.

Jump to a Pattern

Screen Resolution
--
Pixel Ratio
--
Color Gamut
--
HDR
--
Refresh Rate
Measuring…

As reported by your browser. Browser zoom and scaled display modes change the resolution shown, so it can differ from your screen's native resolution. The refresh rate is an estimate from frame timing; power saving can lower it.

How to Use It

What the Results Mean

What You SeeFault
Black dot on every colorDead pixel
Colored dot on blackStuck subpixel
White dot on blackHot pixel
Off-color dot on a mixDead subpixel: the missing color (yellow is red plus green, cyan is green plus blue, magenta is red plus blue)
Dot that moves when you wipeDust, not a pixel fault

If You Find One

Guides

More Tools

Questions

How do I check for dead pixels?

Press Start Dead Pixel Test and step through the solid colors. On each one, look across the whole screen for a dot that doesn't match: black on white is a dead pixel, a bright dot on black is a stuck or hot pixel.

What is the difference between a dead and a stuck pixel?

A dead pixel stays black because it gets no power. A stuck pixel stays one color, often red, green, or blue, because one or more of its subpixels stays on. A hot pixel stays white.

Can a stuck pixel be fixed?

Not safely at home. Dell advises against pressing on the screen or using pixel-fixing software: pressure can crack the display, and home fixes may void the warranty. Pixel-fixing tools also flash colors rapidly, which can trigger seizures in people with photosensitive epilepsy, so we don't offer one. The real fix is a warranty claim, a repair, or a return.

How many dead pixels are acceptable?

It depends on the maker's pixel policy. Many allow a few dead pixels before a replacement, while some promise zero. Check the policy and the seller's return window as soon as you find one.

Does it work on phones and laptops?

Yes. On iPhone the colors cover the screen instead of using true full screen, so turn the phone sideways and scroll the browser bars away.