Pure white test screen

This presentation will cover your LCD screen with several solid colors, one at a time. This makes it fairly easy to see stuck (always on or off) pixels. - ppt download

Pure red screen for testing

Display Tester - Apps on Google Play

Our TV Picture Quality Tests: Gray Uniformity

PURE WHITE SCREEN Video Test Pattern

Helix Test Systems - Interster International B.V.

Problems with Picker - App Development - CodeCrew Community

Black level - Lagom LCD test

Pure White Wallpapers - Wallpaper Cave