Display tests
Find dead pixels, uneven backlighting, color issues, banding, ghosting and more.
- Display TestFill the screen with solid colors to spot tint, bleed, and uneven areas.
- Dead Pixel FinderCycle through solid colors to find pixels that are stuck or dead.
- Stuck Pixel FixerFlash rapidly changing noise over the screen to try to free a stuck pixel.
- Refresh Rate TestEstimate your display refresh rate and watch a motion test at that rate.
- Motion & Ghosting TestMove patterns across the screen to look for ghosting, blur, smearing and overdrive halos.
- Screen Uniformity TestFill the screen with uniform white, black, gray, red, green and blue to find uneven areas.
- Backlight Bleeding TestShow black and near-black screens to find backlight bleed, glow and clouding.
- Brightness TestStep through brightness levels and uniform fields to check for dim or uneven areas.
- Contrast TestCheck that nearby shades of gray, near black and near white, stay distinguishable.
- Gamma TestCheck shadow detail, midtones and highlights with grayscale and gamma patterns.
- Gradient TestShow smooth gradients to reveal banding and rough color transitions.
- Screen Color TestShow any color full-screen to check for tint, discoloration, and uneven patches.
- HDR TestSee what HDR and wide-color capabilities your browser reports, with test patterns.
- Burn-In TestSolid colors and gray fields to look for image retention and possible burn-in.
- Screen Flicker TestPatterns at different brightness levels and frame rates to help you spot visible flicker.
- Screen Geometry TestGrids, circles and rulers to check scaling, distortion, aspect ratio and overscan.
Before you start
- Clean the screen with a soft, dry cloth first so dust is not mistaken for a faulty pixel.
- Use the brightness you normally use, and dim the room for the black and dark gray patterns.
- Look at the whole panel for each pattern, including the corners and edges.