Perfect for display testing and dead pixel detection
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A black screen test displays a pure black (#000000) fullscreen background used for detecting stuck pixels, testing OLED burn-in, checking backlight bleed, and verifying display uniformity. Unlike dead pixels (which stay black), stuck pixels appear as bright colored dots on a black screen - typically red, green, blue, or white dots that shouldn't be visible.
This test is essential for quality control on new monitors, laptops, smartphones (iPhone, Samsung, Google Pixel), tablets (iPad, Surface), TVs, and OLED displays. Black screens reveal stuck pixels, backlight bleeding (light leaking from edges), and screen uniformity issues that aren't visible during normal use.
Bright dots on black indicate stuck pixels that are permanently lit. Most visible with black backgrounds, making this the #1 test for stuck pixel detection.
LCD monitors often have backlight bleeding visible as bright edges or clouding on black screens. Critical for gaming monitors and professional displays.
Test OLED/AMOLED screens (phones, TVs) for burn-in by looking for persistent image retention or discoloration on pure black.
Evaluate true black levels and contrast ratio - essential for photo/video editing, gaming, and HDR content consumption.
1. Clean your screen with a microfiber cloth to avoid mistaking dust for pixels
2. Enter fullscreen mode and dim room lights for maximum visibility
3. Look for bright colored dots (stuck pixels) across the entire screen
4. Check edges and corners for backlight bleeding (bright areas)
5. Move your eyes across the screen systematically, checking all areas
6. Compare with white screen test to distinguish stuck vs dead pixels
💡 Testing Tip: Stuck pixels are most visible on black screens but show wrong colors on white. Dead pixels appear black on all colors including white.
Appear as red, green, blue, or white dots on black. These pixels are stuck 'on' and may be fixable with pixel fixing software.
Bright edges or cloudy patches, especially in corners. Common in IPS monitors, generally not covered by warranty unless severe.
Permanent ghost images or discoloration on OLED screens from static content like navigation bars, logos, or HUD elements in games.
Uneven black levels across the screen indicate manufacturing defects or panel degradation.
Test in a dark room - backlight bleed and stuck pixels are most visible in darkness
New display? Test within return period (usually 14-30 days) for warranty claims
Take photos/videos of defects for warranty claims with manufacturers
Test all colors (black, white, red, green, blue) for comprehensive pixel testing
OLED users: Run pixel refresher tools if burn-in is detected
Stuck pixels sometimes self-correct after a few days of varied use
A black screen is used for dead pixel detection, OLED burn-in testing, display uniformity checks, screen cleaning, and testing monitor contrast. It's essential for display testing and quality control.
Enter fullscreen black mode and look for pixels that remain lit (stuck pixels appear as bright dots on black). Dead pixels stay black on white screens. Test both black and white screens for complete pixel testing.
Stuck pixels appear as bright colored dots on a black screen because they're permanently lit. Dead pixels stay black on all colors including white screens. Use both black and white screen tests to identify which type of defect you have.
Bright edges or clouding on black screens indicate backlight bleeding, common in LCD/LED monitors especially IPS panels. While aesthetic, it's usually not covered by warranty unless severe. Reduce brightness to minimize the effect.