There may come a time when you feel the need to test whether the LCD display on your computer monitor is working fine. You may believe that the little dot is a dead pixel, so how do you make sure?

A defective pixel on an LCD screen. Bad pixels are often transistors that are permanently dead and appear as black dots or permanently energized and show up as white or colored dots ("hot pixels").

The PC hardware space can be quite wasteful from the environmental perspective. Most peripherals have to be replaced — not because they stop working, but because they are too dumb and slow for the ...