Power Management User Guide
© Copyright 2008 Hewlett-Packard Development Company, L.P. Windows is a U.S. registered trademark of Microsoft Corporation. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
Product notice This user guide describes features that are common to most models. Some features may not be available on your computer.
iv Product notice ENWW
Table of contents 1 Power control and light locations 2 Shutting down the computer 3 Setting power options Using power-saving states ................................................................................................................... 4 Initiating and exiting Sleep ................................................................................................... 4 Initiating and exiting Hibernation ..........................................................................................
5 Using external AC power Connecting the AC adapter ................................................................................................................ 15 Index ...................................................................................................................................................................
1 Power control and light locations The following illustration and table identify and describe the power control and light locations. NOTE: Your computer may look slightly different from the illustration in this section. (1) (2) ENWW Component Description Power lights (2)* ● On: The computer is on. ● Blinking: The computer is in the Sleep state. ● Off: The computer is off or in Hibernation. ● Amber: A battery is charging. ● Turquoise: A battery is close to full charge capacity.
Component Description ● When the computer is in the Sleep state, press the button briefly to exit Sleep. ● When the computer is in Hibernation, press the button briefly to exit Hibernation. If the computer has stopped responding and Windows® shutdown procedures are ineffective, press and hold the power button for at least 5 seconds to turn off the computer. To learn more about your power settings, select Start > Control Panel > System and Maintenance > Power Options.
2 Shutting down the computer CAUTION: Unsaved information will be lost when the computer is shut down. The Shut Down command closes all open programs, including the operating system, and then turns off the display and computer.
3 Setting power options Using power-saving states The computer has two power-saving states enabled at the factory: Sleep and Hibernation. When Sleep is initiated, the power lights blink and the screen clears. Your work is saved to memory, letting you exit Sleep faster than exiting Hibernation. If the computer is in the Sleep state for an extended period or if the battery reaches a critical battery level while in the Sleep state, the computer initiates Hibernation.
To exit Hibernation: ▲ Press the power button briefly. The power lights turn on and your work returns to the screen where you stopped working. NOTE: If you have set a password to be required when the computer exits Hibernation, you must enter your Windows password before your work will return to the screen. Using the battery meter The battery meter is located in the notification area, at the far right of the taskbar.
Customizing power plans 1. Click the battery meter icon in the notification area and then click More power options. – or – Select Start > Control Panel > System and Maintenance > Power Options. 2. Select a power plan, and then click Change plan settings. 3. Change the Turn off the display and Put the computer to sleep timeout settings, as needed. 4. To change additional settings, click Change advanced power settings and make your changes.
4 Using battery power When a charged battery is in the computer and the computer is not plugged into external power, the computer runs on battery power. When the computer is plugged into external AC power, the computer runs on AC power. If the computer contains a charged battery and is running on external AC power supplied through the AC adapter, the computer switches to battery power if the AC adapter is disconnected from the computer.
The time shown indicates the approximate running time remaining on the battery if the battery continues to provide power at the current level. For example, the time remaining will decrease when a DVD is playing and will increase when a DVD stops playing. Inserting or removing the battery CAUTION: Removing a battery that is the sole power source can cause loss of information. To prevent loss of information, initiate Hibernation or shut down the computer through Windows before removing the battery.
3. Remove the battery (2). Charging a battery WARNING! Do not charge the computer battery while you are onboard aircraft. The battery charges whenever the computer is plugged into external power through an AC adapter, an optional power adapter, an optional expansion product, or an optional docking device. The battery charges whether the computer is off or in use, but it charges faster when the computer is off.
Managing low battery levels The information in this section describes the alerts and system responses set at the factory. Some lowbattery alerts and system responses can be changed using Power Options in Windows Control Panel. Preferences set using Power Options do not affect lights. Identifying low battery levels When a battery that is the sole power source for the computer reaches a low battery level, the battery light blinks.
Resolving a low battery level CAUTION: To reduce the risk of losing information when the computer reaches a critical battery level and has initiated Hibernation, do not restore power until the power lights turn off. Resolving a low battery level when external power is available ▲ Connect one of the following devices: ● AC adapter ● Optional expansion product or docking device ● Optional power adapter Resolving a low battery level when a charged battery is available 1.
To fully charge the battery: 1. Insert the battery into the computer. 2. Connect the computer to an AC adapter, optional power adapter, optional expansion product, or optional docking device, and then plug the adapter or device into external power. The battery light on the computer turns on. 3. Leave the computer plugged into external power until the battery is fully charged. The battery light on the computer turns off. Step 2: Disable Hibernation and Sleep 1.
Step 4: Fully recharge the battery To recharge the battery: 1. Plug the computer into external power and maintain external power until the battery is fully recharged. When the battery is recharged, the battery light on the computer turns off. You can use the computer while the battery is recharging, but the battery will charge faster if the computer is off. 2. If the computer is off, turn it on when the battery is fully charged and the battery light has turned off.
Storing a battery CAUTION: To prevent damage to a battery, do not expose it to high temperatures for extended periods of time. If a computer will be unused and unplugged from external power for more than 2 weeks, remove the battery and store it separately. To prolong the charge of a stored battery, place it in a cool, dry place. NOTE: A stored battery will slowly discharge and should be charged every 6 months. Calibrate a battery before using it if it has been stored for one month or more.
5 Using external AC power External AC power is supplied through one of the following devices: WARNING! To reduce potential safety issues, use only the AC adapter provided with the computer, a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP. ● Approved AC adapter ● Optional docking device or expansion product Connect the computer to external AC power under any of the following conditions: WARNING! Do not charge the computer battery while you are onboard aircraft.
3. 16 Plug the other end of the power cord into an AC outlet (3).
Index A AC adapter, connecting 15 O operating system B battery calibrating 11 charging 9, 11 conserving power 13 disposing 14 inserting 8 low battery levels 10 recharging 13 removing 8 storing 14 battery light 1, 9, 10 battery power 7 battery release latch 8 battery temperature 14 button, power 1 P power connecting 15 conserving 13 control and light locations 1 power button, identifying 1 power lights, identifying 1 C calibrating battery 11 charging batteries 9, 11 connection, external power 15 conserva
