
Free online screen test for dead pixels and flicker



Screen Issues is a free online screen test tool. Instantly diagnose dead pixels, lines, color issues, and flickering. Multiple test modes, no download needed.
Open https://www.screenissues.com in a browser, pick a test, and go full screen. Solid colors and motion patterns make stuck pixels, dark spots, vertical lines, tint, and flicker easier to see.
It works on desktop and mobile with no install. Troubleshooting guides explain what a mark usually means. Pricing is free. Founder: Feng Zeng.
Use it when you unbox a monitor, laptop, phone, or TV, or before a warranty return. It does not repair hardware or replace a calibrator. It gives repeatable patterns so you can describe what you see.

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