Dark Screen Test
Display a pure black or near-black screen to test backlight bleed, OLED uniformity, and dark room performance. On OLED displays, pure black pixels are completely off.
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What to look for
Backlight bleed: bright spots or glow around the edges of the screen (LCD only).
Clouding: uneven patches of lighter areas in the center or corners.
OLED uniformity: any visible differences in darkness across the panel.
Best tested in a completely dark room for accurate results.