Energy Saving features grayed out because the Energy Star option is not checked.
Cause:
The 'Energy Start Compliant' option is not enabled in the 'Change Display Type' dialog box. Windows does not detect that the monitor supports this function.
Solution:
Select 'Change Display Type' from the 'Display Settings' properties sheet and select 'Monitor is Energy Star Compliant'.
1) Click the 'Start' button to display the 'Start' menu.
2) Select 'Settings' and select 'Control Panel'. (The 'Control Panel' window appears.)
'Control Panel'
3) Double-click the 'Display' icon. (The 'Display Properties' dialog box appears.)
'Display' icon
4) Click the 'Settings' tab.
5) Click 'Change Display Type...'. (The 'Change Display Type' dialog box appears.)
6) Select the 'Monitor is Energy Star compliant' check box in the 'Monitor Type' group.
7) Click 'Close'. (The 'Display Properties' dialog box reappears.)
8) Click 'OK'. (The 'Control Panel' window reappears.)
9) Double-click the 'Display' icon. (The 'Display Properties' dialog box appears.)
'Display' icon
10) Click the 'Screen Saver' tab.
11) Select the desired energy saving settings.
12) Click 'OK'. (The 'Control Panel' window reappears.)