Pixel visibility
Use solid colors to spot dead, stuck, bright, or dark pixels.
For display inspection
Check a screen before it becomes a problem
Use Screen Tester to inspect dead pixels, color uniformity, gradients, light bleed, and other visible display issues in fullscreen.
What to inspect
Fullscreen patterns make display issues easier to notice than normal desktop content.
Uniformity and bleed
Check dark and light screens for uneven brightness, edge glow, or patchy areas.
Color and gradient checks
Use color patterns to review banding, tint, contrast, and general panel behavior.
Screen check steps
Use this before buying, selling, troubleshooting, or setting up a display.
1
Clean the display
Wipe dust and fingerprints first so marks are not mistaken for panel issues.
2
Run fullscreen patterns
Open Screen Tester and inspect each color or pattern carefully.
3
Change distance and lighting
Look from normal viewing distance and close range, with room lighting adjusted for the issue you are checking.
After testing
Once the display is checked, use it for one of these fullscreen workflows.
Latest Black Screen Guides
Practical tutorials for presentations, screen testing, eye rest, OLED protection, and black screen troubleshooting.
Black Screen for Presentations The Ultimate Guide
Learn how to quickly switch to black screen during presentations, classrooms, or meetings using BlackScreen, with support for Google Slides and PowerPoint to enhance presentation control. Provides full-screen black screen operation tips and best practices.
How to Use BlackScreen Sessions for Focus & Relaxation
Learn how to schedule timed black screens with BlackScreen for focus training or eye relaxation. Includes step-by-step instructions, recommended settings, and real usage examples.
How to Use Black Screen for Monitor Testing
Learn how to use BlackScreen to perform monitor testing, detect dead pixels, check color uniformity, and protect OLED screens. Step-by-step guide for full-screen black display and practical testing scenarios.
Screen testing questions
Notes for interpreting fullscreen test patterns.
Can this diagnose hardware failure?
It helps reveal visible display issues, but it does not replace professional repair diagnostics.
Should I test in a dark room?
Dark rooms are useful for checking light bleed, while normal room lighting is useful for everyday visibility.
Can I test phones and TVs?
Yes. Open Screen Tester in the browser on the device or display it through a connected browser source.
Inspect your screen in fullscreen
Open Screen Tester and check the display with clean full-screen patterns.
Open screen tester