iMac Screen always "on"

[MrVegas]

I have a new iMac with a big screen. I went to System Preferences / Energy Saver and set the "display sleep" to 10 minutes, thinking that the screen saver or blank screen would kick in at that time. But it never does, the screen stays on continuously. What am I doing wrong?

 

[John Doe 57]

Press these keys simultaneously:

Shift + Control + Eject

Does the screen turn off and then come right back on?

 

[MrVegas]

Press these keys simultaneously:

Shift + Control + Eject

Does the screen turn off and then come right back on?

No, it does not!

 

[John Doe 57]

No, it does not!

So it doesn't turn off at all?

Try these Programs:
http://www.macupdate.com/info.php/id/25161/sleep-display

http://www.macupdate.com/info.php/id/32947/displaysleep