Q. Sometimes I leave my computer on for hours at a time. Can
this practice harm the machine?
A. The back of your monitor is coated with phosphors which glow
when bombarded with a stream of electrons. This bombardment can
be controlled to create the precise images on your screen, but if
it is kept on for a long period of time, the phosphors of that
image will burn out, leaving a permanent "ghost" on your screen.
There are programs that will turn off your blank after a few
minutes if a key is not pressed. This will prevent the problem.
