Complete Screen Test
Check the most important parts of a monitor, laptop, phone, tablet or TV display in one guided flow—without jumping between separate pages.
Screen diagnostic wizard
Use normal viewing distance, clean the screen first, and begin at a comfortable brightness. The diagnostic opens directly in full screen; you can mark suspicious spots on the test surface.
Before you start
- Clean dust and fingerprints from the display.
- Use normal brightness; avoid maximum brightness unless a step asks for it.
- Reduce strong reflections and direct light.
- For TVs and external monitors, open this page on the screen you want to inspect.
Black screen
Look for pixels that remain bright or colored.
Not rated yet. You can continue and return later.
Your screen-check summary
This summary reflects your own visual observations. It is not automated hardware certification.
What does the complete screen test check?
The guided test displays controlled patterns for dead and stuck pixels, RGB subpixels, gray uniformity, gradients, contrast, text sharpness, scaling and motion. The browser does not physically scan the panel; you inspect each pattern and record what you see.
How to interpret the results
A single suspicious point that stays black on bright colors may indicate a dead pixel, while a point that remains a fixed color may be a stuck subpixel. Uneven gray or white areas can indicate panel uniformity differences, and visible steps in a smooth gradient can indicate banding. Motion tests are visual comparisons only and do not measure laboratory response time.
For a reliable check
Repeat any suspicious result at a second brightness level and, when possible, test the same location on several contrasting colors. Dust, browser zoom, display scaling, reflections and image-processing settings can all affect what you see.
Choose another test
Open a specialized tester when you want to examine one display characteristic in more detail.