Dead Pixel on LCD Monitor

If your LCD screen has a stuck or dead pixel (a point on the screen that is always lit or always dark), it is usually due to a transistor malfunction or uneven distribution of liquid in the liquid crystal display (TFT LCD). This can often be fixed.

Generally, there are three methods for fixing stuck pixels:

• Software Method, which includes running software to re-energize the pixels by rapidly turning them on and off. Some of the most popular software for repairing stuck pixels are: JScreenFix and UDPixel.
• Pressure Method, which includes turning the monitor off, applying pressure on the place where the stuck pixel occurs, and then turning it back on.
• Tapping Method, which includes displaying a black image on the monitor and tapping the place where the stuck pixel occurs.

The software method is considered to be safer, so you should try it first. The pressure/tapping methods are less safe and they can damage the monitor even more, so you should be very careful when performing them.

Complete instructions on: http://www.wikihow.com/Fix-a-Stuck-Pixel-on-an-LCD-Monitor
Wikipedia provides accurate definition on defective pixels, including the differences between Hot pixels, Dead pixels and Stuck pixels.