Monitor Dead Pixel Checker | Find Dead & Stuck Pixels With Solid Colors
Fill your monitor with solid red, green, blue, white and black to hunt for dead pixels that never light up and stuck pixels that stay lit. Cycling through colors reveals defects that only show against one specific background.
💡 About this tool
When a single subpixel on an LCD or OLED panel fails, it can freeze on one color or stop lighting up entirely. A stuck pixel hides on a screen of its own color, and a dead pixel only shows as a dark dot on bright backgrounds. That is why a single test color never catches everything.
This checker lets you flip between five full-screen colors so each defect stands out against a background it cannot blend into. It is handy before buying a used monitor, phone or tablet, when deciding whether a fault qualifies for a manufacturer's dead-pixel warranty, or when checking a brand-new panel straight out of the box. Get close to the screen and scan slowly for any dot that stays dark or glows the wrong color.
🧐 Frequently Asked Questions
What is the difference between a dead pixel and a stuck pixel? A dead pixel gets no power and stays black even on bright screens. A stuck pixel is frozen on red, green or blue and shows up against any solid background of a different color.
Why cycle through several colors? A pixel stuck on red is invisible on a red screen. Showing green, blue, white and black in turn gives every defect a contrasting background where it becomes visible.
Can a stuck pixel be fixed? Sometimes. Rapidly flashing colors over a stuck pixel can nudge it back to life. It is not guaranteed, but it is worth trying before filing a warranty claim.
Will one or two bad pixels be covered by warranty? Coverage depends on the maker and panel grade, each with its own threshold for acceptable pixel faults. Check the specific dead-pixel policy before you buy. This tool helps you count and locate the dots by eye.
Does it work on phones and TVs? Any device with a browser follows the same steps. For a TV, use a built-in browser or mirror a phone or computer screen to it.
📚 Why solid-color testing works
Modern panels pack millions of subpixels, and not every one survives manufacturing perfectly, which is why a few faults can slip through quality control. Flooding the display with a pure primary color removes all detail and texture, so your eye only has to spot the single point that breaks the uniform field. The black and white screens cover the two extremes: black exposes pixels stuck bright, while white exposes those stuck dark or dead.