Screenshot of Dead Pixel Checker
A Dead Pixel is a pixel (dot) on an LCD monitor that remains unlit, or black, when it should be activated and displaying a color. Each pixel on an LCD screen is made from three separate subpixels—one red, one green and one blue—that when combined form the colors that the users see on the monitor. A dead pixel occurs when the transistor that activates the amount of light that shows through all three subpixels malfunctions and results in a permanently black pixel. Coloring the screen different colors makes it easy to locate dead pixels.
Using DPC will easily help you determine if there is a dead pixel on your flat panel display.
This application is for use on Windows 2000, Windows XP, or Windows Vista.