LCD Screen Test Online - Check Backlight Bleed, Glow and Ghosting
Check an LCD or IPS panel for backlight bleed, clouding, IPS glow, grayscale uniformity, banding and pixel response problems. View a black field in a dim room for bleed and glow, then use grey ramps and moving patterns at the panel's normal response-time setting.
How to test this display step by step
What to look for during a LCD Screen Test
Inspect the center, corners and edges on every pattern. Repeat suspicious results at normal brightness with automatic display adjustments off. A defect visible across colors, apps and inputs is more likely a panel issue.
Panel-specific notes
IPS glow changes with viewing angle, whereas fixed clouding or a bright corner is a panel uniformity concern; camera exposure is not a reliable severity score.
Before contacting support
Repeat the result at native resolution, normal brightness and a second input or browser. Record the model, firmware, power state and a photo from normal viewing distance.
How to interpret a suspicious result
Repeat the pattern at native resolution and normal viewing distance. A dot fixed across white, black and RGB fields suggests a pixel defect; broad glow or tint that changes with angle suggests uniformity. For motion issues, compare another refresh rate and cable before judging the panel.