Complete Screen Test

Walk through white, black, primary colors, gray, gradients and contrast patterns to inspect a display in one guided session.

Why this test is useful

A tiny point that stays dark on bright fields can indicate a pixel or subpixel that is not illuminating as expected. When you notice a suspicious point or region, remember its exact position and repeat the same location with another pattern.

Before you start

• Clean the screen first so dust, fingerprints and dried cleaner are not mistaken for a panel defect.
• Use the display native resolution when possible and keep browser zoom at 100 percent so fine patterns are not rescaled.
• Start at the brightness you normally use. Extreme brightness can exaggerate some panel behavior and make the result less representative of daily use.

A reliable way to run the test

1. Inspect the whole panel in an ordered path from one corner to the other rather than staring only at the center.
2. Cycle through white, black and the primary colors. A real pixel anomaly usually behaves consistently at the same physical location while the background changes.
3. Repeat uniformity checks at several gray levels because a variation can be obvious at mid gray and almost disappear on pure white or black.
4. When you notice a suspicious point or region, remember its exact position and repeat the same location with another pattern.

How to read the result

A tiny point that stays dark on bright fields can indicate a pixel or subpixel that is not illuminating as expected. A fixed bright point is easiest to see on black or very dark gray and may be a hot or stuck pixel. Compare the center, edges and corners for broad brightness changes, warm or cool tint, dirty screen effect and large patches rather than isolated pixels. A smooth gradient should change gradually. Repeated stripes, abrupt steps or posterized zones can indicate banding somewhere in the display or signal chain.

What to do next

• When you notice a suspicious point or region, remember its exact position and repeat the same location with another pattern.
• After an artificial pattern reveals something, check the same area with real photos, video or games at your normal viewing distance.
• A browser test does not decide whether a panel is inside a manufacturer tolerance. Use the maker pixel policy or warranty terms for that decision.

What this test cannot prove