Dell OptiPlex 755 - Manual (Page 18)

1. Click Start® Control Panel® Pick a category® Performance and Maintenance.
2. Under or pick a Control Panel icon, click Power Options.
3. Define your power settings on the Power Schemes tab, Advanced tab, and Hibernate tab as described in the following sections.
Power Schemes Tab
Each standard power setting is called a scheme. If you want to select one of the standard Windows schemes installed on your computer, choose a scheme
from the Power schemes drop-down menu. The settings for each scheme appear in the fields below the scheme name. Each scheme has different settings for
starting standby mode, hibernate mode, turning off the monitor, and turning off the hard drive.
The Power schemes drop-down menu displays the following schemes:
l Always On (default) — If you want to use your computer with no power conservation.
l Home/Office Desk — If you want your home or office computer to run with little power conservation.
l Portable/Laptop — If your computer is a portable computer that you use for traveling.
l Presentation — If you want your computer to run without interruption (using no power conservation).
l Minimal Power Management — If you want your computer to run with minimal power conservation.
l Max Battery — If your computer is a portable computer and you run your computer from batteries for extended periods of time.
If you want to change the default settings for a scheme, click the drop-down menu in the Turn off monitor, Turn off hard disks, System stand by, or System
hibernates field, and then select a time-out from the displayed list. Changing the time-out for a scheme field permanently changes the default settings for that
scheme, unless you click Save As and enter a new name for the changed scheme.
Advanced Tab
The Advanced tab allows you to:
l Place the power options icon in the Windows task bar for quick access.
l Set the computer to prompt you for your Windows password before the computer exits from standby mode or hibernate mode.
l Program the power button to activate standby mode, activate hibernate mode, or turn off the computer.
To program these functions, click an option from the corresponding drop-down menu and click OK.
Hibernate Tab
The Hibernate tab allows you to enable hibernate mode. If you want to use the hibernate settings as defined on the Power Schemes tab, click the Enable
hibernate support check box on the Hibernate tab.
For more information on power management options:
1. Click Start® Help and Support® Performance and maintenance.
2. In the Performance and maintenance window, click Conserving power on your computer.
Options in Windows Vista
The Microsoft Vista power management features can reduce the amount of electricity your computer uses when it is on and you are not using it. You can
reduce power to just the monitor or the hard drive, or you can use sleep mode or hibernate mode to reduce power to the entire computer. When the
computer exits from a power conservation mode, it returns to the operating state it was in prior to entering the mode.
Sleep Mode
Sleep mode conserves power by turning off the display and the hard drive after a predetermined period of inactivity (a time-out). When the computer exits
sleep mode, it returns to the same operating state it was in before entering sleep mode.
To enter sleep mode in Windows Vista, click Start , click the arrow in the lower-right corner of the Start menu, and then click Sleep.
To exit sleep mode, press a key on the keyboard or move the mouse.
NOTICE: If you set the hard drive to time-out before the monitor does, your computer may appear to be locked up. To recover, press any key on the
keyboard or click the mouse. To avoid this problem, always set the monitor to time-out before the hard drive.