How can I prevent my samsung Syncmaster T200HD pc monitor from going to sleep mode?

After a while of inactivity, my samsung pc monitor (T200HD) goes into sleep mode, though this is freaking annoying while watching a movie etc. How can i prevent my monitor from going into sleep mode?How can I prevent my samsung Syncmaster T200HD pc monitor from going to sleep mode?It sounds more like your computer is going into power saving, then your screen goes blank. Check the power options in control panel if you have a PC.