LCD monitor power switch?

i got samsung 2243SWXPLUS, in the manual it said that the monitor contains a power switch which i can turn the monitor on or off... but everytime i turn on the monitor via the "plug" the monitor just turns on automatically... but now i wanna turn off the monitor sometimes to conserve some energy... but the power switch on the lcd monitor just wont work... i touched it many times and nothing respond... anyhelp on how to turn off this monitor? only way i know is to switch off the plug.. this might sound stupid.. i just cant get the power switch to turn off my monitor..