Screen Issues
Free Online Screen Test Tool - Instantly diagnose dead pixels, lines, color issues, and flickering. Multiple test modes, no download needed.
About Screen Issues
Screen Issues is a free online resource for identifying, understanding, and
troubleshooting display defects on monitors, laptops, phones, and tablets.
The interactive Screen Test tool runs full-screen solid colors (white, black,
red, green, blue, gray) in the browser — no download — so you can spot dead
pixels, stuck pixels, bright spots, black spots, backlight bleed, and color
uniformity issues in seconds.
Alongside the tool, expert guides cover dead pixels, screen lines, flickering,
pressure marks, color/tint problems, and device-specific cases (Mac, laptop,
mobile). Content is available in English, German, Spanish, and Portuguese.
Founded by Feng Zeng (Founder & Technical Director). Mission: make screen
diagnostics accessible to everyone.
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