Dead Pixel Test
Check your screen for dead or stuck pixels with solid color patterns
💡 Why This Test?
Dead pixels are individual pixels that remain permanently off (black), while stuck pixels display a single color (red, green, or blue) that won't change.
This test helps you identify pixel defects using solid color backgrounds. Dead or stuck pixels can be distracting, especially during gaming, photo editing, or watching movies.
✅ What You'll Check:
- Dead pixels (permanently black spots)
- Stuck pixels (single color spots that don't change)
- Hot pixels (permanently white/bright spots)
- Overall pixel integrity across your display
📖 How to Use This Test
- Click "Start Test" to enter fullscreen mode
- Use the color buttons or arrow keys to cycle through different colors
- Look carefully at your entire screen for any spots that don't match the background color
- Try all colors - dead/stuck pixels are easiest to spot on contrasting backgrounds
- Press ESC or click the ✕ button to exit and record your results
💡 Tip: For best results, clean your screen first and view in a dark room to spot subtle defects.
Click to start the test in fullscreen. Use color buttons or arrow keys to cycle through colors. Press ESC to exit.
👁️ What You're Looking For
✅ Perfect Screen (Normal)
Uniform color across the entire screen
❌ Dead Pixel Example
Black spots that stay black on colored backgrounds
⚠️ Stuck Pixel Example
Colored spots that don't change with background
📋 How to Test
Start Fullscreen Test
Click the test button and allow fullscreen mode for best results.
Check Each Color
Cycle through all 8 colors: white, black, red, green, blue, yellow, magenta, cyan.
Look Carefully
Scan the entire screen systematically. Dead pixels are easier to spot on contrasting colors.
Navigate
Use arrow keys, click color swatches, or use navigation buttons. Press ESC to exit.
🔍 Quick Reference
- ● Dead Pixel: Always black (most common)
- ● Stuck Pixel: Shows wrong color
- ● Hot Pixel: Always white/bright
- ● Normal: Changes with background
🔧 Common Issues & Solutions
❓ I found 1-2 dead pixels. Is this normal?
Yes, it's common. According to ISO 13406-2 standard, most manufacturers allow a small number of defective pixels:
- Class I: 0 defects (premium)
- Class II: Up to 2 bright pixels, 2 dark pixels (most common)
- Class III: Up to 5 bright pixels, 15 dark pixels
Check your warranty: Most manufacturers follow Class II. Dell, ASUS ROG, and LG UltraGear often have stricter "bright pixel zero" policies. Check your specific model's warranty policy.
❓ Can stuck pixels be fixed?
Sometimes! Stuck pixels (colored pixels) have a 20-30% chance of recovery. Dead pixels (black pixels) are usually permanent hardware failures.
Try these methods:
- JScreenFix: Visit jscreenfix.com - flashes RGB rapidly (run 10-30 min)
- Pixel massage: Gently press on stuck pixel with soft cloth while turning monitor on/off
- Temperature cycling: Let monitor warm up and cool down several times
⚠️ Success rate: ~20-30%. May take several attempts over days.
❓ What's the difference between dead and stuck pixels?
| Type | Appearance | Fixable? |
|---|---|---|
| Dead Pixel | Always black (no power) | ❌ No (hardware failure) |
| Stuck Pixel | Single color (R/G/B stuck on) | ✅ Maybe (20-30% success) |
| Hot Pixel | Always white (all subpixels on) | ⚠️ Rarely (software issue) |
❓ When should I request warranty replacement?
Request RMA/replacement if:
- 5+ dead pixels anywhere on screen
- 1+ bright (stuck white) pixel in center 5x5 inch area
- 3+ bright pixels total (very noticeable)
- Pixel defects appeared within warranty period (usually 1-3 years)
💡 Pro Tips:
- Take clear photos showing defects (use macro mode, white background)
- Note exact pixel locations (measure from edges in cm)
- Check manufacturer's specific dead pixel policy before purchase
- Premium brands (ASUS ROG, Dell UltraSharp, LG UltraGear) have stricter policies
❓ The test colors look wrong or won't fullscreen
Troubleshooting steps:
- Fullscreen not working: Press F11 or click fullscreen button in browser. Some browsers block auto-fullscreen.
- Colors look washed out: Disable Night Light/f.lux/blue light filter temporarily. Check monitor color mode (sRGB recommended).
- Screen too bright/dark: Adjust monitor brightness to 50-80%. Test in dim room for best dead pixel visibility.
- Can't see small pixels: Normal on 4K+ displays. Get closer (30cm) or use magnifying glass for tiny defects.