Power
Document Part Number: 393525-002
December 2005
This guide explains how the computer uses power.
Страница 1: ...Power Document Part Number 393525 002 December 2005 This guide explains how the computer uses power ...
Страница 2: ...navailable 3 4 When using wireless communication or readable or writable media select models only 3 5 4 Default power settings Turning the computer or display on or off 4 2 Using emergency shutdown procedures 4 3 Initiating or resuming from standby 4 4 Initiating or restoring from hibernation 4 5 5 Power options Accessing Power Options Properties 5 1 Displaying the Power Meter icon 5 2 Setting or ...
Страница 3: ... 5 Displaying charge information on the screen 7 6 Managing low battery conditions 7 6 Identifying low battery conditions 7 7 Resolving low battery conditions 7 8 Calibrating a battery pack 7 9 When to calibrate 7 9 How to calibrate 7 10 Conserving battery power 7 13 Conserving power as you work 7 13 Selecting power conservation settings 7 14 Storing a battery pack 7 14 Disposing of a used battery...
Страница 4: ... and describe the power control and light locations Component Description 1 Display switch Initiates standby if the display is closed when the computer is on 2 Power lights 2 On The computer is on Blinking The computer is in standby Off The computer is off or in hibernation Continued ...
Страница 5: ...apacity 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 Blinking A battery pack that is the only available power source has reached a low battery condition When the battery reache...
Страница 6: ...y pack in the computer External power supplied through one of the following devices AC adapter Optional docking device Optional power adapter Charge or calibrate a battery pack in the computer External power supplied through AC adapter Optional docking device Optional power adapter Install or modify system software or write to a CD or DVD External power supplied through AC adapter Optional docking...
Страница 7: ... 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 It is possible to receive an electric shock from a system that is not properly grounded To connect the computer to external AC power 1 Plug the AC adapter into the pow...
Страница 8: ... 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 yo...
Страница 9: ...rnation 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 ÄCAUTION To reduce the risk of information loss save your information 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...
Страница 10: ...y 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 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 unused a...
Страница 11: ...omputer on battery power and do not have access to an external power supply If the battery pack fails hibernation saves your work to a hibernation file and shuts down the computer If you pause your work when the power supply is uncertain you take one of the following actions Save your work and then initiate standby Initiate hibernation Shut down the computer ...
Страница 12: ...CD or DVD Standby and hibernation interfere with the use of infrared and Bluetooth communication and media Note the following guidelines If the computer is in standby or hibernation you cannot initiate an infrared or Bluetooth transmission If standby or hibernation is accidentally initiated during playback of a medium such as a CD DVD or external media card Your playback may be interrupted You may...
Страница 13: ...3 6 Power Standby and hibernation ...
Страница 14: ...1 4 Default power settings This section explains the default standby hibernation and shutdown procedures The controls and lights discussed in this section are illustrated in Chapter 1 Power controls and lights ...
Страница 15: ...Then shut down the computer through the operating system by selecting Start Turn Off Computer Turn Off If the system is unresponsive and you are unable to shut down the computer with these procedures refer to Using emergency shutdown procedures The power lights are turned off The operating system shuts down The computer is turned off Turn off the display when the power is on Close the computer Clo...
Страница 16: ...rmation If the computer is unresponsive and you are unable to use normal Windows shutdown procedures try the following emergency procedures in the sequence provided Press ctrl alt delete Then select Shut Down Turn Off Press and hold the power button for at least 5 seconds Disconnect the computer from external power and remove the battery pack ...
Страница 17: ...y In Windows XP Professional if Stand by is not displayed 1 Press the down arrow 2 Select Stand by from the list 3 Click OK or Close the computer The power lights blink The screen clears Resume from user initiated standby Press the power button If the display was closed when the computer was in standby open the display The power lights are turned on Your work returns to the screen ...
Страница 18: ...intenance Power Options Hibernate tab If hibernation is enabled the Enable hibernation check box is selected Task Procedure Result Initiate hibernation Press the power button or Select Start Turn Off Computer Then hold down the shift key as you select Hibernate In Windows XP Professional if hibernate is not displayed 1 Press the up or down arrow 2 Select Hibernate from the list 3 Click OK The powe...
Страница 19: ...y condition Power settings and timeouts can be changed using Power Options in Windows Control Panel The power lights are turned off The screen clears Restore from user initiated or system initiated hibernation Press the power button The power lights are turned on Your work returns to the screen If the system initiated hibernation because of a critical low battery condition connect external power o...
Страница 20: ... is on Pressing fn f5 called the sleep button by the operating system initiates standby By default the display switch turns off the display and initiates standby The display switch is activated by closing the display Accessing Power Options Properties To access Power Options Properties Right click the Power Meter icon in the notification area at the far right of the taskbar and then click Adjust P...
Страница 21: ...er To add or remove the power meter icon from the notification area 1 Right click the Power Meter icon in the notification area and then click Adjust Power Properties 2 Click the Advanced tab 3 Select or clear the Always show icon on the taskbar check box 4 Click Apply and then click OK If you cannot see an icon you have placed in the notification area at the far right of the taskbar click the arr...
Страница 22: ...ning on battery or external power You can also set a power scheme that initiates standby or hibernation or turns off the display or hard drive after a time interval that you specify To set a power scheme 1 Right click the Power Meter icon in the notification area and then click Adjust Power Properties 2 Click the Power Schemes tab 3 Select the power scheme you want to modify and choose from the op...
Страница 23: ...n the computer is turned on resumes from standby or restores from hibernation To set a password prompt 1 Right click the Power Meter icon in the notification area and then click Adjust Power Properties 2 Click the Advanced tab 3 Select the Prompt for password when computer resumes from standby check box 4 Click Apply ...
Страница 24: ...k airflow In some cases the computer may operate at a higher speed on external power than on battery power If a battery pack is the sole source of power and the battery power is extremely low the computer may attempt to conserve power by reducing processor speed and graphics performance Windows XP enables you to manage the processor performance controls by selecting a power scheme The processing s...
Страница 25: ...s determined based on CPU demand Portable Laptop default Performance state is determined based on CPU demand Performance state is determined based on CPU demand Presentation Performance state is determined based on CPU demand Runs at lowest possible performance state Always On Always runs at the highest performance state Always runs at the highest performance state Minimal Power Management Perform...
Страница 26: ...display brightness is automatically decreased to save battery life when you disconnect from AC power To increase display brightness use the fn f8 hotkey or reconnect your AC adapter You can keep a battery pack in the computer or in storage depending on how you work Keeping the battery pack in the computer whenever the computer is plugged into external AC power enables the battery pack to charge an...
Страница 27: ... initiate hibernation or turn off the computer before removing the battery pack Battery packs may vary in appearance To insert a battery pack 1 Turn the computer upside down on a flat surface 2 Insert the battery pack 1 into the battery bay and rotate it down 2 until it is seated The battery pack release latch automatically locks the battery into place ...
Страница 28: ...ttery pack 1 Turn the computer upside down with the battery bay facing away from you 2 Slide the battery pack release latch 1 to release the battery pack 3 Pivot the battery pack away from the computer 2 and remove it from the battery bay 3 ...
Страница 29: ...e the computer is plugged into external power through the AC adapter When you charge the battery pack charge it fully before using the computer If you are charging an in use battery pack Allow the battery pack to discharge to about 10 percent of a full charge through normal use before charging it When you charge the battery pack charge it fully A battery pack inserted in the computer charges whene...
Страница 30: ...nformation about determining the amount of charge in a battery pack refer to the Monitoring the battery pack charge section next in this chapter Monitoring the battery pack charge This section explains several ways to determine the amount of charge in a battery pack Obtaining accurate charge information To increase the accuracy of all battery charge indicators Allow a battery pack to discharge to ...
Страница 31: ...percentage and as the number of minutes of charge remaining The percentage indicates the approximate amount of charge remaining in the battery pack The time indicates the approximate running time remaining on the battery pack if the battery pack continues to provide power at the current level For example the time remaining will decrease when you start playing a DVD and will increase when you stop ...
Страница 32: ...s a critical low battery condition and the battery light blinks rapidly In a critical low battery condition If hibernation is enabled and the computer is on or in standby the computer initiates hibernation If hibernation is disabled and the computer is on or in standby the computer remains briefly in standby and then shuts down and may lose any unsaved information To verify that hibernation is ena...
Страница 33: ...ndition when external power is available connect one of the following AC adapter Optional docking device Optional power adapter When a charged battery pack is available To resolve a low battery condition when a charged battery pack is available 1 Turn off the computer or initiate hibernation 2 Insert a charged battery pack 3 Turn on the computer When no power source is available To resolve a low b...
Страница 34: ...ttery pack Three steps are involved in calibrating a battery pack fully charging fully discharging and then fully recharging When to calibrate Even if a battery pack is heavily used it should not be necessary to calibrate it more than once a month It is not necessary to calibrate a new battery pack Calibrate a battery pack under the following conditions When battery charge displays seem inaccurate...
Страница 35: ...puter to an AC adapter optional power adapter or optional docking device and then plug the adapter or device into external power The battery light on the computer is turned on 3 Leave the computer plugged into external power until the battery pack is fully charged The battery light on the computer is turned off Step 2 Discharging the battery pack Before you begin a full discharge disable hibernati...
Страница 36: ...g performance from your system during the discharge process The monitor will not turn off automatically Hard drive speed will not decrease automatically when the computer is idle System initiated hibernation will not occur To fully discharge a battery pack 1 Right click the Power Meter icon in the notification area at the far right of the taskbar and then click Adjust Power Properties or Access th...
Страница 37: ...turned off You can use the computer when the battery pack is recharging but the battery pack will charge more quickly if the computer is off 2 If the computer is off turn it on when the battery pack is fully charged and the battery light is turned off 3 Access the Power Schemes tab by selecting Start Control Panel Performance and Maintenance Power Options Power Schemes tab 4 Reenter the settings t...
Страница 38: ...ou are not using them Disconnect external devices that you are not using if they are not plugged into an external power source Stop or remove any optional external media cards that you are not using Remove a CD or DVD that you are not using Disable or remove an inserted digital card Use the fn f7 hotkeys to reduce screen brightness Use optional powered speakers instead of the internal speakers Tur...
Страница 39: ...to a battery pack do not expose it to high temperatures for extended periods of time If a computer will be unused and disconnected from external power for more than 2 weeks remove the battery pack and store it separately To conserve the charge of a stored battery pack place it in a cool dry place Disposing of a used battery pack ÅWARNING To reduce the risk of fire or burns do not disassemble crush...
Страница 40: ...battery pack release latch 7 3 button power 1 2 C calibration battery 7 9 charging battery packs 7 4 computer display turning on or off 4 2 conservation power 7 13 critical low battery condition 7 7 D display switch identifying 1 1 drive media 3 5 E emergency shutdown procedures 4 3 F fn f5 hotkey 1 2 4 4 H hibernation defined 3 2 enabling disabling 3 2 initiated during critical low battery condit...
Страница 41: ...ce controls 6 1 R readable media 3 5 release latch battery pack 7 3 reset emergency shutdown procedures 4 3 S screen saver 7 14 security passwords 5 4 shutdown procedures 4 3 shutting down 4 2 software Power Meter 5 1 standby defined 3 1 initiating 4 4 resuming from 4 4 switch display 1 1 T temperature storage battery pack 7 14 traveling with the computer battery pack temperature considerations 7 ...
Страница 42: ...otice 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 Power Second Edition December 2005 First Edition October 2005 Document Part Number 393525 002 ...
