Pixel stands for "Picture Element". The picture on an LCD or plasma display is made up of thousands of pixels which can't usually be seen individually by the naked eye. Each pixel is made up of three sub pixels (red, green and blue). Working together, these pixels make up the image you can see on a display.
As the number of pixels on a screen is so huge, it's possible that there may be some failure at manufacturer level. When ordering an LCD or Plasma display, or a device which has a display built in – such as a laptop, you should be aware of the possibility of pixel failure.
If you experience any issues with pixel tolerance, we’ll refer you to the manufacturer in the first instance. Once a fault document has been acquired, the item can be returned under warranty.