If you feel that your monitor is not displaying the images as it should be or the pixels are not showing up as they should then you could check them easily.
There are many tools available on the internet to test and check the dead pixels on the screen and IsMyLcdOK is one of them which offer the users a series of tests to identify the pixel that is not showing up. IsMyLcdOK is a small program but effective solution to easily check for dead/paralysed/stuck pixels on LCD monitors.
The tool is fairly simple to use and require no installation and thus can be run directly from the USB drive. The main menu provides access to multiple tests performed by the presentation of colors, Curves and lines, and should help paralyzed or dead pixels on a color to find.