Your LCD monitor is made up of millions of pixels. They create the images you see on your computer screen. So, just a few of them going dead can be a real annoyance, especially if you're a photographer or graphic artist.
That's why some monitor manufacturers have a return policy for dead pixels. Those policies vary by manufacturer, but typically they'll replace a monitor if it has more than several pixels stuck in a single color, or brightness setting.
If you've recently bought an LCD display, test its pixel quality with IsMyLCDOK. This free program will help you spot problem pixels.
It's easy to use. With the touch of a button, it turns your screen a solid color. This makes it simple to spot off-color pixels. Run through every available color to make sure you're not missing any.