Quick Reference Guide 25Depending on how you set the power management options in the PowerOptions Properties window or the QuickSet Power Management Wizard, youmay also use one of the following methods:• Press the power button.• Close the display.• Press .To exit standby or sleep mode, press the power button or open the display,depending on how you set the power management options. You cannot makethe computer exit standby or sleep mode by pressing a key or touching thetouch pad.Hibernate ModeHibernate mode conserves power by copying system data to a reserved area onthe hard drive and then completely turning off the computer. When thecomputer exits hibernate mode, it returns to the same operating state it wasin before entering hibernate mode.NOTICE: You cannot remove devices or undock your computer while yourcomputer is in hibernate mode.Your computer enters hibernate mode if the battery charge level becomescritically low.To manually enter hibernate mode in Windows XP, click the Start button,click Turn off computer, press and hold , and then click Hibernate.To manually enter hibernate mode in Windows Vista, click the WindowsVista Start button , and then click Hibernate.Depending on how you set the power management options in the PowerOptions Properties window or the QuickSet Power Management Wizard, youmay also use one of the following methods to enter hibernate mode:• Press the power button.• Close the display.• Press .NOTE: Some PC Cards or Express Cards may not operate correctly after thecomputer exits hibernate mode. Remove and reinsert the card, or simply restart(reboot) your computer.