Screen Issues
Free online screen test — diagnose dead pixels, lines, color issues & flicker. No download.
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About Screen Issues
Screen Issues is a free online screen test and display diagnostics resource. The interactive Screen Test tool runs full-screen solid colors in the browser so you can spot dead pixels, stuck pixels, bright spots, backlight bleed, and color uniformity issues in seconds. Expert guides cover dead pixels, screen lines, flickering, pressure marks, and device-specific cases for monitors, laptops, phones, and tablets. Available in English, German, Spanish, and Portuguese.
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