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Display & Touch • Hardware Screen Diagnostic

Screen Dead Pixel Tester – Display Uniformity Test

Detects dead or stuck sub-pixels, backlight bleeding, and OLED burn-in with calibrated primary and neutral colors in full screen.

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Screen Dead Pixel & Uniformity Tester

Display & Touch

Detects dead or stuck sub-pixels, backlight bleeding, and OLED burn-in with calibrated primary and neutral colors in full screen.

Color Quick Swatches
Quick Actions Ready
How to Inspect: When testing phone screens or replacement digitizer assemblies, cycle through white (to spot dark dead pixels or dirt under glass) and black (to detect stuck permanently lit sub-pixels or edge backlight bleed). Press Esc or tap anywhere to cycle colors.

Frequently Asked Questions

What is the difference between a dead pixel and a stuck pixel?

A dead pixel is a permanently unpowered black transistor that fails to illuminate. A stuck pixel is permanently frozen on one primary color sub-pixel (red, green, or blue) and can sometimes be revived with rapid color flashing.

How do I test for OLED screen burn-in?

Display a solid neutral gray (50% gray) or pure magenta screen in full-screen mode. Ghost silhouettes of navigation buttons or status bar icons will reveal differential phosphor/organic sub-pixel wear.

How do technicians test replacement phone display assemblies?

Before applying adhesive frame glue, connect the LCD/OLED flex cable to the motherboard and cycle through full-screen white (to spot backlight dirt and dead pixels) and black (to detect edge backlight bleeding).

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