Buying a Used Monitor? A Practical Inspection Checklist
Check the panel, ports, controls and supplied accessories in a sensible order—without treating one browser test as a pass/fail certificate.
Read guideSCREENBLACK GUIDES
Practical guides for your display
Clear, careful advice for testing, caring for and understanding screens—without treating a visual check as a professional diagnosis.
These guides add context to ScreenBlack’s free browser tools. Each one focuses on a practical question, explains what a visual test can and cannot show, and points you to the next useful step.
How to Clean a Monitor Screen Safely
Start with the device maker’s instructions, a clean microfiber cloth and minimal moisture. Avoid spraying liquid onto the panel.
Read guideHow to Document a Screen Problem Before Contacting Support
Capture the screen, settings and test conditions in a way that helps a seller or support team understand what you actually observed.
Read guideHow to Set Up a Repeatable Screen Test
Room light, reflections, browser zoom, HDR and display settings can change what you see. Use a simple repeatable method before drawing conclusions.
Read guidePure Black vs Near-Black: Which Screen Pattern Should You Use?
Pure black and near-black are different checks. Choose the pattern that matches the visual question instead of treating every dark-screen artifact alike.
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