This is one tool that lets you find and eventually fix stuck pixels. It packs many options into a singly tiny window, but once you have an overview its straightforward and easy to use.
To test the screen click the small pick a color box. The colors you should test are red, green and blue. Additionally you should test white and black. Follow the instructions in the box to gain the best results.
This is a very thorough test not only meant to identify bad pixels, but also powerful enough to test the quality of your monitor. You can choose between three different modes to test your monitor. This tool either requires flash (online version) or it can be installed in the executable mode.
I recommend UDPixel to quickly identify and fix pixels using a single tool. The program requires .NET Framework 2.
With the dead pixel locator on the left you can easily detect any screen irregularity that may have escaped your vision until now. Should you have identified a suspicious pixel, switch to the undead pixel option, create sufficient amounts of flash windows (one per stuck pixel) and hit start. You can drag the tiny flashing windows to where you found the pixel in question. Let it run for a while and eventually change the flash interval.
JScreenFix is designed to fix your LCD’s stuck pixels by quickly switching red, green, and blue colors on your monitor.
Hands on technique
This method is done by placing a damp (not wet!) paper towel over you monitor. Place your stylus or blunt pencil tip on the paper towel over where the stuck pixel is. You have to place it exactly on the stuck pixel. Now turn of your monitor and apply a small amount of pressure to the stylus / pencil. Wait two seconds and then turn your monitor back on. Your stuck pixel should be fixed! If it is not, try repeating but this time, apply a little more pressure.
This method works because a stuck pixel is a pixel in which the liquid in the liquid crystal has not or not completely spread to this pixel. The backlight uses this liquid and lets different amounts of light through. This affects the color of the pixel. The pressure helps the liquid in the liquid crystal move around.