Dell Inspiron 640M Owner's Manual page 40

To enter standby mode:
• Click the Start button, click Turn off computer, and then click Stand by.
or
• Depending on how you set the power management options on the Advanced tab (see "Configuring
Power Management Settings" on page 41) in the Power Options Properties window, use one of the
following methods:
– Press the power button.
– Close the display.
– Press <Fn><Esc>.
To exit standby mode, press the power button or open the display depending on how you set the options
on the Advanced tab. You cannot make the computer exit standby mode by pressing a key or touching
the touch pad.
Hibernate Mode
Hibernate mode conserves power by copying system data to a reserved area on the hard drive and then
completely turning off the computer. When the computer exits hibernate mode, it returns to the same
operating state it was in before entering hibernate mode.
NOTICE:
You cannot remove devices or undock your computer while your computer is in hibernate mode.
Your computer enters hibernate mode if the battery charge level becomes critically low.
To manually enter hibernate mode:
• Click the Start button, click Turn off computer, press and hold <Shift>, and then click Hibernate.
or
• Depending on how you set the power management options on the Advanced tab in the Power Options
Properties window, use one of the following methods to enter hibernate mode:
– Press the power button.
– Close the display.
– Press <Fn><F1>.
NOTE:
Some ExpressCards may not operate correctly after the computer exits hibernate mode. Remove and
reinsert the card (see "Removing an ExpressCard or Blank" on page 66), or simply restart (reboot) your computer.
To exit hibernate mode, press the power button. The computer may take a short time to exit hibernate
mode. You cannot make the computer exit hibernate mode by pressing a key or touching the touch pad.
For more information on hibernate mode, see the documentation that came with your operating system.
40
Using a Battery