Power User Guide © Copyright 2006 Hewlett-Packard Development Company, L.P. Microsoft and Windows are U.S. registered trademarks of Microsoft Corporation. Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. 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. First Edition: July 2006 Document Part Number: 416616-001 Table of contents 1 Power control and light locations 2 Power sources Connecting the AC adapter .................................................................................................................. 4 3 Standby and hibernation Standby ................................................................................................................................................ 5 Hibernation ........................................................................................................................................... 6 Initiating standby, hibernation or shutdown .......................................................................................... 7 When you leave your work .................................................................................................. 7 When a reliable power supply is unavailable ....................................................................... 7 When using wireless communication, or readable or writable media .................................. 8 4 Power settings Turning the computer or display on or off ............................................................................................. 9 Using emergency shutdown procedures ............................................................................................ 10 Initiating or resuming from standby .................................................................................................... 11 Initiating or restoring from hibernation ................................................................................................ 12 5 Power options Accessing Power Options Properties ................................................................................................. 13 Displaying the Power Meter icon ........................................................................................................ 14 Setting or changing a power scheme ................................................................................................. 15 Setting a security prompt .................................................................................................................... 15 6 Processor performance controls 7 Batteries Inserting or removing a battery .......................................................................................................... 20 Charging a battery pack ..................................................................................................................... 21 Monitoring the charge of the battery pack ......................................................................... 21 Obtaining accurate charge information ............................................................. 21 Displaying charge information on the screen .................................................... 21 Viewing charge displays ................................................................... 22 Interpreting charge indicators ........................................................... 22 Managing low-battery conditions ........................................................................................................ 23 Identifying low-battery conditions ....................................................................................... 23 ENWW iii Low-battery condition ........................................................................................ 23 Critical low-battery condition ............................................................................. 23 Resolving low-battery conditions ....................................................................................... 24 When external power is available ..................................................................... 24 When a charged battery pack is available ........................................................ 24 When no power source is available .................................................................. 24 When the computer cannot restore from hibernation ........................................ 24 Calibrating a battery pack ................................................................................................................... 25 When to calibrate ............................................................................................................... 25 How to calibrate ................................................................................................................. 25 Step 1: Charging the battery pack ..................................................................... 25 Step 2: Discharging the battery pack ................................................................ 26 Step 3: Recharging the battery pack ................................................................. 27 Conserving battery power .................................................................................................................. 28 Conserving power as you work .......................................................................................... 28 Selecting power conservation settings .............................................................................. 28 Storing a battery pack ........................................................................................................................ 29 Disposing of a used battery pack ....................................................................................................... 29 Index ................................................................................................................................................................... 31 iv ENWW 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. Component (1) Power button Description When the computer is Off, press to turn on the computer. On, press to enter hibernation. In standby, briefly press to exit standby. In hibernation, briefly press to exit hibernation. If the computer has stopped responding and Microsoft® Windows® shutdown procedures cannot be used, press and hold the power button for at least 5 seconds to turn off the computer. (2) Power lights* (2) On: The computer is on. Blinking: The computer is in standby. Off: The computer is off or in hibernation. (3) fn+f5 Initiates standby. ENWW 1 Component (4) Battery light Description Amber: A battery is charging. Green: A battery is close to full charge capacity. Blinking amber: A battery that is the only available power source has reached a low-battery condition. When the battery reaches a critical low-battery condition, the battery light begins blinking rapidly. Off: If the computer is plugged into an external power source, the light is turned off when all batteries in the computer are fully charged. If the computer is not plugged into an external power source, the light stays off until the battery reaches a low-battery condition. (5) Internal display switch Turns off the display and initiates standby if the display is closed while the computer is on. *The 2 power lights display the same information. The light on the power button is visible only when the computer is open. The light on the front of the computer is visible whether the computer is open or closed. 2 Chapter 1 Power control and light locations ENWW 2 Power sources The computer runs on internal or external AC power. The following table indicates the best power sources for common tasks. NOTE Use only the provided AC adapter or one approved for use with this computer. Task Work in most software programs. Recommended power source Charged battery in the computer External power supplied through one of the following devices: Charge or calibrate a battery in the computer. AC adapter included with the computer Optional expansion product Optional power adapter External power supplied through AC adapter included with the computer. Optional expansion product. Optional power adapter. WARNING! Do not charge the computer battery while you are onboard aircraft. Install or modify system software or write to a CD or DVD. External power supplied through AC adapter included with the computer. Optional expansion product. Optional power adapter. ENWW 3 Connecting the AC adapter WARNING! To reduce the risk of electric shock or damage to the equipment: Plug the power cord into an AC outlet that is easily accessible at all times. Disconnect power from the computer by unplugging the power cord from the AC outlet (not by unplugging the power cord from the computer). If provided with a 3-pin attachment plug on the power cord, plug the cord into a grounded (earthed) 3-pin outlet. Do not disable the power cord grounding pin, for example, by attaching a 2-pin adapter. The grounding pin is an important safety feature. To connect the computer to external AC power: 1. 2. 3. Plug the AC adapter into the power connector (1) on the computer. Plug the power cord into the AC adapter (2). Plug the other end of the power cord into an AC outlet (3). 4 Chapter 2 Power sources ENWW 3 Standby and hibernation Standby and hibernation are energy-saving features that conserve power and reduce startup time. They can be initiated by you or by the system. Standby CAUTION To avoid a complete battery discharge, do not leave the computer in standby for extended periods. Connect the computer to an external power source. Standby reduces power to system components that are not in use. When standby is initiated, your work is stored in random access memory (RAM), and then the screen is cleared. When the computer is in standby, the power lights blink. When you resume from standby, your work returns to the screen where you left off. CAUTION To reduce the risk of information loss, save your work before initiating standby. ENWW Standby 5 Hibernation CAUTION If the configuration of the computer is changed during hibernation, resuming from hibernation may not be possible. When the computer is in hibernation: Do not dock the computer to or undock the computer from an optional expansion product. Do not add or remove memory modules. Do not insert or remove any hard drives or optical drives. Do not connect or disconnect external devices. Do not insert or remove external media cards. Hibernation saves your work to a hibernation file on the hard drive, and then shuts down the computer. The power lights are turned off. When you restore from hibernation, your work returns to the screen where you left off. If a power-on password has been set, the password must be entered to restore from hibernation. CAUTION To reduce the risk of information loss, save your work before initiating hibernation. You can disable hibernation. However, if hibernation is disabled and the system reaches a low-battery condition, the system will not automatically save your work while power is on or when standby has been initiated. Use Power Options in Microsoft® Windows® Control Panel to reenable hibernation: Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate tab. Be sure that the Enable hibernation check box is selected. To set the time interval after which the system initiates hibernation: 1. 2. Select Start > Control Panel > Performance and Maintenance > Power Options. Click one of the intervals in the System hibernates list. 6 Chapter 3 Standby and hibernation ENWW Initiating standby, hibernation or shutdown The following sections explain when to initiate standby or hibernation and when to shut down the computer. NOTE You cannot initiate any type of networking communications or perform any computer functions while the computer is in standby or hibernation. When you leave your work When standby is initiated, your work is stored in random access memory (RAM), and then the screen is cleared. When the computer is in standby, it uses less power than when it is on. Your work returns instantly to the screen when you resume from standby. Initiating hibernation saves your work to a hibernation file on the hard drive, and then shuts down the computer. When the computer is in hibernation, it uses much less power than when it is in standby. When the computer will be ...