How to Check for Dead Pixels on Any Screen
Step-by-step guide to finding dead and stuck pixels on monitors, laptops, phones, tablets, and TVs using free online tools.
Guides
Helpful articles about testing and troubleshooting your screen, monitor, and devices.
Dead Pixel vs Stuck Pixel — What Is the Difference?
Learn the difference between dead pixels and stuck pixels, how to identify each, and whether they can be fixed.
How to Test for Backlight Bleed on Your Monitor
Guide to testing your LCD monitor for backlight bleed and IPS glow. Includes tips for reducing light leakage.
IPS Glow vs Backlight Bleed — How to Tell the Difference
Learn the difference between IPS glow and backlight bleed, how to identify each on your monitor, and what you can do about them.
How to Test Your Monitor Refresh Rate
Verify 60Hz, 144Hz, or 240Hz in your browser. Fix common issues and understand browser limitations.
How to Test Keyboard Ghosting & Anti-Ghosting
Test your keyboard for ghosting — when pressing multiple keys and some are not registered. Includes NKRO explanation.
How to Test Mouse Double-Clicking Issues
Diagnose mouse double-click problems. Check if your mouse registers double clicks from a single press.
How to Test Your Webcam Before a Meeting
Quick guide to testing your webcam before Zoom, Teams, or Google Meet. Check camera, resolution, and lighting.
How to Test Your Microphone Before a Zoom Call
Test your microphone before Zoom, Teams, or Google Meet. Check audio levels, playback quality, and mic selection.