Test Your Display for Dead Pixels, Backlight Bleed & More
3 professional-grade tests covering dead pixels, backlight bleed, and color accuracy. Instant browser-based testing, no downloads required.
Why Test Your Display?
Catch defects early and make informed decisions about your device
Professional Accuracy
Lab-quality test patterns used by tech reviewers and QA teams. Detect even subtle display defects with confidence.
Instant Browser-Based Testing
No downloads, no installation, no account required. Run comprehensive display tests directly in your browser in seconds.
Works on Any Device
Test monitors, laptops, phones, tablets, and TVs. Our tools work on LCD, LED, OLED, and AMOLED displays.
Catch Issues Early
Test before your warranty expires or return window closes. Save money by catching manufacturing defects early.
When Should You Test?
Timing matters—test at these critical moments to catch issues while you can still act
Just Unboxed a New Device
Test within 24-48 hours of purchase. Most return windows are 14-30 days—catch defects immediately while exchange is hassle-free.
Warranty Expiring Soon
Document any defects before warranty ends. Even minor issues can worsen over time—get them on record now.
Before Selling or Trading
Professional test results build buyer confidence and justify your asking price. Document perfect condition or disclose known issues.
Periodic Health Checks
Annual testing catches gradual degradation. Backlight bleed and dead pixels can develop slowly—early detection prevents surprises.
Testing Best Practices
Follow these steps for the most accurate results
✓ Before Testing
Clean your screen
Dust and fingerprints can be mistaken for dead pixels—wipe with microfiber cloth first
Adjust brightness to 100%
Maximum brightness makes stuck pixels and backlight bleed more visible
Close background apps
Prevent notifications and overlays from interfering with fullscreen tests
Test in the right environment
Dark room for backlight bleed, normal lighting for pixel tests
⏱️ During Testing
Take your time
Spend 30-60 seconds on each color pattern—dead pixels are easy to miss if you rush
Watch for stuck vs dead
Dead pixels are black on all colors; stuck pixels show color on black backgrounds
Check all edges and corners
Defects often appear in corners or along bezels—don't just scan the center
Use fullscreen mode
Browser chrome and toolbars hide portions of your display—always use F11 or fullscreen button
📋 After Testing
Screenshot or photograph defects
Document location and severity—useful for warranty claims and seller transparency
Try the stuck pixel fixer
If you found colored stuck pixels, our repair tool has a 60-80% success rate
Contact support within return window
Most retailers offer 14-30 day returns—act quickly if you found manufacturing defects
Retest after repairs
Verify fixes worked and no new defects appeared during the repair process
Phones & Tablets
- Disable auto-brightness and set to maximum
- Turn off notification previews before starting
- Rotate to landscape for full-width tests
Laptops
- Plug into power (some laptops dim on battery)
- Disable sleep/screensaver settings temporarily
- Test at multiple viewing angles for consistency
Desktop Monitors
- Verify you're testing the correct monitor in multi-display setups
- Test at native resolution (not scaled or stretched)
- Check all display inputs if you switch sources regularly
Start Testing: Recommended Paths
Choose the testing approach that matches your situation
Start with Pixel Test
Most common defects are stuck or dead pixels. This is our most popular test for good reason.
Dead Pixel Test
#1 most used test • 2 minutes
Not sure which test to run? Start with the Pixel Test—it's quick, covers the most common issues, and you can always run additional tests afterward.
Frequently Asked Questions
Choose Your Test
Select the testing path that matches your needs
Complete Check
Run all 3 professional tests for comprehensive display health analysis. Best for new devices.
Quick Pixel Check
Fast dead pixel detection—our most popular test. Perfect for routine health checks.
Specific Issue
Target a specific concern—backlight bleed, color accuracy, or pixel defects.