How to inspect a small pixel defect on a laptop

A tiny dot on a high-DPI laptop screen can be hard to identify. It may be a stuck or dead pixel, a speck on the screen surface, or an artifact in the picture. High pixel density makes individual pixels small, so a mark can look different when you change the viewing distance or magnification.

Check the mark against several solid colors before deciding what it is. The Display Test provides color patterns for inspection. If the mark appears to be a stuck pixel, the Stuck Pixel Fixer can try a short flashing cycle, but it cannot repair every defect.

Inspect the pixel defect

1. Open the Display Test on the laptop screen you want to check. If you have more than one display connected, make sure you are looking at the laptop's panel.
2. Set the screen to its native resolution, usually the option marked Recommended in display settings. Keep the operating system's scaling at a comfortable setting. Scaling changes the size of text and controls, not the physical pixels in the panel.
3. Look at the suspected spot on the color patterns. Check it against white, black, red, green and blue if those patterns are available. A pixel problem may stand out on one color and blend into another.
4. Use a magnifier or a phone camera with close focus to see whether the mark is one tiny point, several neighboring points, or a smudge on the surface. Do not press the screen while checking.
5. Move your head slightly and change the viewing angle. Then compare the mark with another page or application. Note whether it stays at exactly the same physical screen location.
6. If the mark looks like a colored pixel that stays lit, you can try the Stuck Pixel Fixer. Keep the affected spot within its flashing area and use the timer for a brief attempt, then repeat the color check.

Flashing patterns can bother people with photosensitivity or a history of seizures. Do not run the fixer if flashing light is unsafe for you, and stop immediately if you feel discomfort.

What the result means

A bright or colored point stays in the same place

A pixel or one of its subpixels may be stuck on. A subpixel is one of the red, green or blue parts that combine to make a pixel's color. If the spot changes color between patterns but does not disappear, one subpixel may be responding differently from its neighbors. A brief flashing attempt may help a stuck pixel, but success is not guaranteed.

A black point remains visible on every pattern

This may be a dead pixel, where the pixel no longer lights, or another panel defect. A dead pixel usually remains dark against white and colored patterns. A browser test can show what the screen displays, but it cannot confirm the internal cause. Compare the spot with the signs in stuck pixel vs. dead pixel.

The mark changes or disappears when the image changes

If it appears only in one application, one image, or one browser page, the cause may be in that content or software rather than the panel. If it stays at the same physical spot over different patterns, suspect the display instead. A screenshot viewed on another screen can help: a mark visible in that screenshot is part of the image, while a physical panel defect is not captured in the screenshot.

The mark looks like a fleck or smear

A mark with an irregular edge, or one that shifts when you change your viewing angle, may be dust or residue on the surface. Turn the display off and inspect it under room light. Do not push on the panel to see whether the mark moves.

How to check common causes

1. Clean the surface gently. Turn off the laptop and use a clean, dry microfiber cloth. Do not press hard or spray liquid directly onto the screen. If the mark remains at the same point on every pattern, it is less likely to be surface dirt.
2. Confirm the native resolution. In Windows 11, open Settings › System › Display and check Display resolution for the option marked Recommended. On macOS, open System Settings › Displays and choose the default display setting. A non-native resolution can make patterns look soft, but it does not create a physical pixel defect.
3. Reset browser zoom. Press Ctrl + 0 on Windows or Command + 0 on Mac to return the page to its normal zoom. This makes the test easier to view consistently. It does not change the panel's pixel count.
4. Compare another image source. Open a different application or a plain page and check the same location. If the mark appears in only one image or application, update or restart that software before treating it as a panel fault.
5. Try a short stuck-pixel cycle only for a lit pixel. If the point is colored or bright rather than black, use the Stuck Pixel Fixer briefly, then check the same location again. Repeated flashing is not a fix for a dead pixel, and long sessions are not a good substitute for service.
6. Check the laptop's support terms. If a dark or colored point remains on every pattern, look up the manufacturer's display defect policy. Warranty coverage can depend on the number, type and location of defects.

When the display may need service

If the same point remains visible across solid colors, applications and a restart, and careful surface cleaning makes no difference, the panel may have a physical defect. A browser test cannot repair a dead pixel or prove that the panel meets a manufacturer's warranty threshold. Take a clear photo of the screen on a solid color, note the defect's location, and contact the laptop manufacturer or a repair shop before attempting to open the display.

For a larger check of a monitor or laptop panel, see how to check a monitor for dead pixels.