Dead Pixel Test
Check your monitor for dead, stuck, or hot pixels with our comprehensive color test
How to Use This Test
Best Testing Conditions: Clean your screen first and test in a dark room for best results. Make sure your monitor has been on for at least 30 minutes.
Test Process:
- 1. Click "Start Dead Pixel Test" above
- 2. Your screen will display solid colors
- 3. Look for pixels that don't match the color
- 4. Press space or click to cycle through colors
What to Look For:
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Dead Pixels: Always black, no light
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Stuck Pixels: Stuck on one color (red, green, or blue)
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Hot Pixels: Always white or bright
Colors Tested:
Understanding Pixel Defects
What Are Dead Pixels?
Dead pixels are defective pixels on your screen that remain unlit, appearing as tiny black dots. They occur when the transistor that powers the pixel fails completely, preventing any light from passing through.
Dead Pixels vs Stuck Pixels
| Type | Appearance | Cause | Fixable? |
|---|---|---|---|
| Dead Pixel | Always black | Complete transistor failure | Usually No |
| Stuck Pixel | Single color (R, G, or B) | Transistor stuck on/off | Sometimes Yes |
| Hot Pixel | Always white/bright | All sub-pixels stuck on | Maybe |
Manufacturer Policies
Most manufacturers have pixel defect policies that determine warranty coverage:
- Premium monitors: 0-1 dead pixel tolerance
- Standard monitors: 3-5 dead pixel tolerance
- Budget monitors: 5-8 dead pixel tolerance
- Location matters: Center pixels often have stricter policies
Found Dead Pixels? Here's What to Do
For New Monitors:
- • Check the return policy immediately
- • Document the defect with photos
- • Contact the retailer within the return window
- • Reference the manufacturer's pixel policy
For Used Monitors:
- • Always test before purchasing
- • Negotiate price based on defects
- • Consider if the location impacts your use
- • Factor in that dead pixels can't be fixed
Possible Fixes for Stuck Pixels:
- • Gentle pressure method (risky)
- • Pixel flashing software
- • Heat method (not recommended)
- • Professional repair (expensive)