Dead Pixels Test

Dead or defective pixels are tiny dots on a screen that don’t work like they should. Instead of showing the right colors, they stick out like sore thumbs, ruining movies, games, and photos. They’re either stuck on one color, stay black forever, or shine too bright.

To check the monitor for defective pixels, start our test.

Click the “►” button in the test panel.

Check our online monitor test.

Types of Defective Pixels

1. Stuck Pixels: These guys are like that one friend who insists on wearing the same outfit every day. Stuck pixels stay locked on a single color like red, green, blue, or white and won’t change no matter what.
2. Dead Pixels: Dead pixels are always black because they don’t receive any power. They look like tiny black dots on your screen, even if your screen is turned on and showing bright colors.
3. Hot Pixels: Hot pixels are like dead pixels but opposite—they’re always bright and often appear as glaring white dots on the screen.

What can cause this?

• Manufacturing Defects: Sometimes, screens leave the factory with defective pixels already in place.
• Physical Damage: Dropping, bending, or scratching the screen can cause pixels to get stuck or die.
• Overheating or Electrical Faults: Too much heat or power issues can fry pixels, leaving them dead or stuck.

Importance of Testing for Dead Pixels

Awarranty Considerations If a screen has too many defective pixels, some companies will repair or replace it for free under warranty. Each company has its own policy, so testing early can help you get a new screen or a fix before the warranty runs out.

User Experience Defective pixels can be annoying when trying to enjoy a movie, play a game, or edit a photo. Testing can help identify and fix them, giving you a smoother experience.

Testing for defective pixels is essential, whether it’s for a new screen you just bought or an old favorite that’s starting to act up.

Manual Testing

1. Full-Screen Solid Color Tests. The full-screen solid color test is like shining a spotlight on your screen to reveal any hidden troublemakers. It’s done by showing solid colors like red, green, blue, white, and black across the whole screen. Defective pixels stand out as little dots that don’t change color. Here’s how to do it:
   • Open your favorite drawing app (like MS Paint or something similar).
   • Create a blank canvas and fill it with a single color.
   • Change the background color one by one: red, green, blue, white, and black.
   • Look closely at the screen for any odd spots.
2. Magnifying Glass Method. For a closer look, a magnifying glass can help spot those tiny pixel problems! Simply:
   • Turn your screen to a solid color.
   • Use a magnifying glass to examine each corner of your screen.
   • Look for any odd dots that don’t match the background.

Software Testing Tools

1. Online Pixel Tests at Allcolorscreen.com are quick and easy! With just a click, they switch your screen through different colors to highlight any defective pixels.
2. Dead Pixel Buddy: This handy tool is free and super easy to use.
3. LCD DeadPixel Test: This online tool is another free favorite.Just head to their websites, start the test, and see if any tiny dots stand out!
4. Pixel Testing Software If you’d rather use software, there are plenty of good ones to try.
5. JScreenFix: It flashes colors rapidly on your screen to detect and sometimes fix stuck pixels.
6. UDPixel: Similar to JScreenFix, it identifies and fixes stuck pixels.Download and follow the instructions to see if your screen has any sneaky pixels.