The monitor is an essential part of our computer system, to choose a good monitor is fundamental to the health of our eyes.
First let me introduce to you the 2 free program that I find is helpful.
1. Monitor Tester (Freeware)
You can use this program to test your CRT and LCD monitor.
It helps you test the sharpness, color convergence and the geometry of your monitor.
Monitor Tester if a freeware, you can use it freely.
It is a portable software so you can just download and extract the program into a usb and start using, bring this to the computer store to test the LCD monitor before you buy.
Click here to download Monitor Tester
2. UDPixel (Freeware)
This program helps to locate and fix LCD screens dead pixels.
You can fix the stuck pixels by calling them to do rapid changes. You need to run this program for a couple of hours. There is no warranty on the result, but you don't really have anything to lose trying it out. Good luck.
Click here to download UDPixel
You should also take a look at the below 2 links for more information and ways of testing and fixing dead pixels in LCD monitor.
This website offer images for you to test your LCD monitor, it teach you how to differential a good LCD monitor and a bad one, the author allow you to copy the images into your usb so you can bring to test a LCD monitor before you buy.
This website offer you the way to test for dead pixels of your LCD monitor. The author teach you how to test for dead digital camera pixels too.