Dead Pixel
A dead pixel is a pixel that remains unlit (black) on a white or colored background. This is caused by a transistor malfunction, meaning the pixel receives no power and cannot display any light.
Dead Pixel Test Tool
Test your screen for dead, stuck, or hot pixels with our comprehensive color testing tool. Use different colors to identify pixel defects across your entire display.
Black
Color 1 of 8
Color Selection
Automatic Test
Let the tool automatically cycle through all colors to help you spot pixel issues. Will automatically enter fullscreen mode for optimal testing.
💡 Pro Tip
Look closely at your screen while cycling through colors. Dead pixels appear as black dots, stuck pixels show as colored dots, and hot pixels appear as bright white dots.
⌨️ Keyboard Shortcuts
← → Arrow keys: Navigate colors
Space: Next color
F or Enter: Toggle fullscreen
Escape: Exit fullscreen
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What is a Dead Pixel?
A dead pixel is a single point on a screen—like an LCD monitor, smartphone, or TV—that no longer illuminates, causing it to appear as a black or white spot. Each pixel is made up of three sub-pixels (red, green, and blue) that work together to create the full spectrum of colors. When a pixel is "dead," it means one or more of its sub-pixels are permanently turned off due to a manufacturing defect or damage.
Unlike a "stuck pixel," which may be fixed, a dead pixel is typically a permanent hardware issue. Our dead pixel test helps you identify these defects by displaying a series of solid color screens, making any unlit pixels easy to spot.
- Dead pixels often look like tiny black dots on a white background.
- Stuck pixels show as a single color (red/green/blue) on any background.
- Hot pixels appear bright white on a black background.
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After testing for dead pixels, use these complementary tools for comprehensive display testing:
How to Test for Dead Pixels
Step-by-Step Testing Process
- 1Start with a black screen to identify bright (hot) pixels
- 2Use white screen to find dark (dead) pixels
- 3Test primary colors (red, green, blue) for stuck pixels
- 4Check secondary colors (cyan, magenta, yellow) for color-specific issues
- 5Use fullscreen mode for comprehensive testing
What to Look For
Dead Pixels:Black dots that don't light up
Stuck Pixels:Colored dots that don't change
Hot Pixels:Bright white dots on dark screens
🔍 Testing Tips
- • Test in a dark room for better visibility of pixel defects
- • Look at your screen from different angles
- • Use the automatic test feature to cycle through colors systematically
- • Take your time - some pixel issues are subtle
- • Test the entire screen area, especially corners and edges
🔗 Complete Your Display Testing
After testing for dead pixels, ensure your display is fully optimized with these additional tests:
Dead Pixel vs. Stuck Pixel
While often used interchangeably, there are key differences between dead, stuck, and hot pixels. Understanding the type of pixel issue you have is the first step in determining if it can be fixed.
Stuck Pixel
A stuck pixel is always lit and will appear as a solid color (red, green, blue, or a combination) on any background. This happens when one or more sub-pixels are permanently on and cannot change.
Hot Pixel
A hot pixel is a specific type of stuck pixel that always appears white. This means all three sub-pixels are permanently turned on to their maximum brightness, creating a bright white dot.
How to Fix Dead Pixels
It's important to note that a true dead pixel (one that is always black) is a hardware defect and usually cannot be fixed through software. However, if you have a stuck pixel (one that is a solid color), there are a few methods you can try.
Disclaimer: These methods involve applying pressure or rapid color changes to your screen. Proceed with caution, as excessive force can cause more damage. We are not responsible for any damage that may occur.
Method 1: Pressure Method
- Turn off your monitor.
- Get a damp cloth (not wet) to avoid scratching the screen.
- Use a pointed, but not sharp, object (like a PDA stylus or the cap of a pen). Wrap the tip with the cloth.
- Apply gentle pressure to the exact area where the stuck pixel is located.
- While applying pressure, turn the monitor back on.
- Remove the pressure. The stuck pixel may now be gone.
Method 2: Software / Video Method
Software solutions work by rapidly flashing a series of colors on the screen to try and shock the stuck sub-pixel back into its normal state. Instead of risking physical damage, you can attempt to repair stuck pixels online using our dedicated utility. It runs an intense, targeted RGB flashing pattern that you can drag directly over the affected area of your monitor for 20-30 minutes to help revive the frozen sub-pixel.
Frequently Asked Questions
Extremely accurate. Our tool displays full-screen, solid colors, making any pixel defects on your screen immediately obvious to the human eye. If a pixel is not displaying the correct color, you will see it.
No, a single dead pixel is a manufacturing defect and cannot "spread" to other pixels. However, the physical stress or electronic fault that caused one pixel to fail could potentially affect adjacent pixels over time, but this is rare.
This depends on the manufacturer's warranty and the pixel's location. Most manufacturers have a policy that allows for a certain number of dead or stuck pixels before a screen is considered defective. Check your warranty, but often 1-3 dead pixels is not covered.
No, a dead pixel has no impact on your device's performance, speed, or functionality. It is purely a display defect.
Absolutely. Our dead pixel test is a web-based tool that works on any device with a modern browser, including iPhones, Android phones, iPads, and other tablets.
Different colors are used to identify different types of pixel defects. A dead pixel is most visible on a white screen, while a hot pixel (always white) is visible on a black screen. Stuck pixels (always one color) are easiest to see on a background of a contrasting color.
Device-Specific Testing Guides
Monitors
- Set your monitor to its native resolution for the sharpest image.
- Turn up the brightness to 100% to make pixel defects easier to spot.
- View the screen from multiple angles, as some pixel issues are only visible from the side.
Laptops
- Disconnect from any external displays to test the laptop screen itself.
- Clean the screen, as laptop screens are prone to smudges.
- Run the test on battery power and while plugged in, as power settings can sometimes affect display.
Phones & Tablets
- Disable auto-brightness and set the screen to its maximum brightness.
- Rotate your device to view the test in both portrait and landscape modes.
- Use the swipe gesture on the colored screen to quickly cycle through colors.
TVs
- Use your TV's built-in web browser to access this page directly.
- Turn off any "dynamic contrast" or "eco" modes that automatically adjust screen brightness.
- Stand back and walk around to view the TV from different distances and angles.
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Resources & Communities
Looking for more help? Check out these popular communities and resources.