$(1)$ You should turn off your computer monitor when you are not using your computer. This is because $(2)$ leaving your monitor turned on can result in phosphor burn$-$in$,$ and $(3)$ phosphor burn$-$in can degrade the image quality of your computer monitor. Moreover, $(4)$ turning off your computer monitor can help make an impact on the nation's energy crisis, $(5)$ and turning off your monitor can prevent it from overheating. Finally, $(6)$ turning off your computer monitor can help you save money on your electrical bill because $(7)$ a computer monitor draws significantly less power when it is turned off than when it is turned on$.$