Frequently Asked Questions
Answers to common questions about display technology, screen issues, and optimization resources
What is TestaScreen?
TestaScreen is an independent educational website dedicated to helping people understand display technology. We provide guides, explanations, and resources about monitors, TVs, laptop screens, color accuracy, common issues like dead pixels, and buying advice.
What kind of site is this?
TestaScreen is a set of free, browser-based display tests - dead pixel, backlight bleed, response time, brightness, contrast and full-screen color screens - plus guides that explain how to read the results. Nothing to install and no account needed.
Is all content really free?
Yes, completely free. We believe quality information about display technology should be accessible to everyone. No registration, no premium plans, no hidden fees.
Is my privacy protected?
Absolutely. We don't track you, don't store your data, and don't use cookies for surveillance. Your privacy is fundamental to how we operate.
Who can benefit from this information?
Anyone interested in understanding displays: photographers for color work, gamers optimizing performance, everyday users troubleshooting screen issues, or people making monitor buying decisions.
What devices are supported?
All devices with a modern web browser, desktop computers, laptops, tablets, phones, and TVs. Works on Windows, Mac, Linux, iOS, and Android.
How do I choose the right monitor for my needs?
Monitor selection depends on your use case. Gamers prioritize refresh rate (144Hz+) and response time. Content creators need accurate color (Adobe RGB or DCI-P3). Office workers benefit from larger screens and good eye comfort. Budget users want value. We offer detailed buying guides for each category to help you make informed decisions based on your specific workflow and budget.
What's a reasonable number of dead pixels to accept?
Most manufacturers accept 0-3 dead pixels as normal under warranty for LCD displays. Check your specific monitor's warranty terms, as premium models may have stricter standards. If you discover dead pixels within the warranty period and they exceed the manufacturer's threshold, you typically qualify for a replacement or refund. Document with photos for warranty claims.
What is color accuracy and why does it matter?
Color accuracy refers to how precisely a display reproduces intended colors. It matters for photographers, videographers, designers, and anyone doing color-critical work. Professionals use color spaces like sRGB (web standard), Adobe RGB (photography), or DCI-P3 (cinema). Accurate colors mean your work looks the same on other devices. Even for casual users, accurate colors improve video watching and photo sharing experiences.
What's the difference between LCD, OLED, and Mini-LED displays?
LCD uses a backlight and liquid crystals to control light, affordable and reliable. OLED has self-emissive pixels (each produces its own light), excellent contrast and colors but risk of burn-in. Mini-LED uses thousands of tiny backlights for better contrast than standard LCD. Each has trade-offs: LCD is cost-effective, OLED offers superior visual quality, Mini-LED balances both. Your choice depends on budget, use case, and priorities.