Use this free pixel test to check a suspicious black, white, colored, or bright point. Compare the same physical location across fullscreen black, white, red, green, and blue fields. A point that stays fixed across colors is useful evidence, but the browser cannot identify the failed component or decide whether a warranty claim applies.
How to test for a dead, stuck, or bright pixel online
Clean the screen gently, then compare the same point across the core colors before deciding whether it is a repair candidate.
Prepare the display
Clean the screen gently. Turn off night mode, color filters, and overlays, and use a comfortable brightness.
Open the test in fullscreen
Start the test on the display with the suspected point. Check that a camera cutout or browser control is not hiding the area you want to inspect.
Compare the five core fields
Move through black, white, red, green, and blue. Look from a normal viewing distance, then move closer to confirm that a point stays in the same place.
Mark the suspicious point
Click or tap the point to add it to the summary. Note its color, the field where it stands out, and its approximate location.
Choose the next check
Use the result table to classify the symptom. Consider the Stuck Pixel Fixer only for a small colored or bright point that stays fixed; use specialist routes for lines, patches, glow, or image-shaped shadows.
What each pixel test color can reveal
The five core fields help you compare one location. Gray and the other desktop patterns are optional broader checks, not proof of a particular failed component.
Swipe sideways to compare columns.Scroll table to view all columns.
| Test field | What to look for |
|---|---|
| Black | Bright or colored points and glow around a point |
| White | Dark points, dust, or surface marks |
| Red | A point that stays a different color on red |
| Green | A point that stays a different color on green |
| Blue | A point that stays a different color on blue |
| Gray (optional) | Broad unevenness, faint retention, or a larger display pattern |
| Other desktop patterns (optional) | Banding, scaling, lines, or broader display behavior |
How to classify your Pixel Test result
Compare the same location across the fields, then classify the shape and behavior before choosing a repair or support path. A result describes what appeared on the screen; it does not identify the failed component or establish warranty eligibility.
Use the visible pattern to choose a cross-check. These are observations and candidates, not proof of a failed component or warranty eligibility.
Swipe sideways to compare columns.Scroll table to view all columns.
| What you see | What it may suggest | Next check |
|---|---|---|
| A dark or unlit point on white and the core colors | Possible dark or dead-pixel candidate; dust and surface marks can look similar. | Clean gently, repeat the core fields, and document it if the point remains. |
| A small red, green, or blue point fixed in one place | Possible stuck or fixed-color point. | Repeat the same location and run the screenshot/source cross-check before considering repair. |
| A bright white point that stays on against black | Possible bright or hot-pixel candidate. | Document the point and confirm that the Stuck Pixel Fixer fits. |
| A line, broad patch, edge glow, or image-shaped shadow | Not a single-pixel result; it may relate to damage, backlight behavior, or image retention. | Use the matching specialist diagnostic or damage route. |
New display or still within the return window? Document the pixel defect for warranty or support before trying a repair method. Record the model, serial number, date, marked location, and test fields, and save clear photographs.
Compare a suspicious dot with common look-alikes
A suspicious mark is easier to interpret when you compare its shape and behavior across several fields. A point that stays fixed may be related to the display, but dust, a protector mark, a reflection, or a larger panel defect can look similar. Use the image as a visual comparison, not as proof of a failed component.
A small colored, white, or unusually bright point that stays fixed across the test may be a candidate. Try the Stuck Pixel Fixer on a possible stuck or bright point. It is a bounded repair attempt, not a diagnosis or guarantee, and it is not intended for dark points, lines, patches, glow, burn-in, or image retention.
If the problem is not one pixel
If the mark is a line, broad patch, edge glow, or image-shaped shadow, the Pixel Test is the wrong tool. Choose the Backlight Bleed Test for edge glow, the Burn-In Test for an image-shaped shadow, or the Screen Color Test for broad tint or banding.
Backlight Bleed Test
Use this for edge glow or bright clouding along the sides of a dark screen.
Open test
Burn-In Test
Use this for an image-shaped mark that remains after the original content is gone.
Open test
Screen Color Test
Use this for broad tint, banding, or uneven color rather than one fixed point.
Open test
Document Damage for Warranty
Use this to record lines, cracks, pressure marks, or other physical damage before contacting support.
Open checklist
How to confirm a suspicious pixel before repair
This is a browser-based visual check. It displays solid fields and records the points you mark, but it cannot inspect panel electronics or prove that a screen is healthy. Confirm the same point across black, white, red, green, and blue before deciding whether it resembles a pixel defect.
A screenshot records the image sent to the display; it does not photograph the panel. If the mark appears on the physical screen but not in a screenshot of the same content, a screen-side issue becomes more plausible. If it appears in the screenshot, investigate the content, software, or graphics output first.
Choose the cross-check that matches your display
External monitor or TV. Open the display’s own menu or built-in test screen, or switch to another input. If the point stays in the same place, the screen itself becomes more likely than one rendered image or source device. This still does not identify the failed component.
Laptop. Compare the built-in panel with an external display. If the point appears only on the laptop panel, the panel becomes more likely. If it appears on both screens in the same image, investigate the computer or graphics output instead.
Phone or tablet. Use the solid-color test in fullscreen and check whether the mark stays fixed relative to the display. Clean the surface and inspect around a camera cutout or screen protector before treating a tiny mark as a pixel defect.
The black, white, red, green, and blue check works for LCD and OLED screens. Broad glow, panel-wide unevenness, and image-shaped retention are different problems, not single-pixel results.
Sources and manufacturer guidance
The references below cover pixel terminology, manufacturer policy examples, and flashing-safety guidance. Policies vary by model and region, so always check the support page for the display you are testing.
- Dell Display Pixel Guidelines · DellPixel defect terminology and support guidance.
- HP Pixel Policy · HPManufacturer pixel-defect policy context.
- Lenovo LCD pixel policy · LenovoLCD pixel and subpixel policy guidance.
- W3C Understanding Success Criterion 2.3.1 · W3CSafety guidance for flashing content.
Device screen reviews
Source-based screen reviews for devices this test works on.
Pixel Test FAQ
Can a Pixel Test fix a pixel?
No. Pixel Test is for inspection. The Stuck Pixel Fixer is a separate, bounded attempt for a plausible coloured or bright point; it cannot promise to repair a dead pixel or another screen defect.
Should I test a new display before the return window ends?
Yes. Test and document any repeatable point while the return or support window is open. Save the model, purchase details, date, photographs, marked location, and the exact manufacturer policy before trying a repair method.
How many dead pixels qualify for warranty service?
There is no universal threshold. Policies vary by manufacturer, model, region, defect type, and location. Use Pixel Test to document what you can observe, then check the exact policy for your display.