Hi my monitor goes to pwer saved mode.I start the computer.it works fine for few minutes.And then it goes to power saved mode.I changed the monitor.Same thing happen.Some thing to do with my hard ware or software problemI can't find it out.When the monitor goes to power saved mode, it turn off like The television screen. Help me.

Try booting in safemode and uninstalling your graphics drivers, then booting up in normal mode and reinstalling them

Check you power options in control panel
Start, settings, control panel, power options
There is a box there to Turn off Monitor - change this to Never