HP Presario A900 - Notebook PC, User Manual

Page 1: ...Power Management User Guide ...

Page 2: ... 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 December 2007 Document Part Number 460109 001 ...

Page 3: ...Product notice This user guide describes features that are common to most models Some features may not be available on your computer iii ...

Page 4: ...iv Product notice ...

Page 5: ...1 Identifying low battery levels 11 Resolving a low battery level 12 Resolving a low battery level when external power is available 12 Resolving a low battery level when a charged battery is available 12 Resolving a low battery level when no power source is available 12 Resolving a low battery level when the computer cannot exit Hibernation 12 Calibrating a battery 13 Step 1 Fully charge the batte...

Page 6: ...Index 22 vi ...

Page 7: ...or writing to a disc or an external media card NOTE You cannot initiate any type of networking connection or perform any computer functions while the computer is in the Sleep state or in Hibernation Initiating and exiting Sleep The system is set at the factory to initiate Sleep after 10 minutes of inactivity when running on battery power and 25 minutes of inactivity when running on external power ...

Page 8: ...0 minutes 18 hours of inactivity when running on external power or when the battery reaches a critical battery level Power settings and timeouts can be changed using Power Options in Windows Control Panel To initiate Hibernation Press fn f5 or Click Start click the arrow next to the Lock button and then click Hibernate To exit Hibernation Press the power button The power lights turn on and your wo...

Page 9: ...ns or to change the power plan click the battery meter icon and select an item from the list Different battery meter icons indicate whether the computer is running on battery or external power The icon also displays a message if the battery has reached a critical battery level To hide or display the battery meter icon 1 Right click the taskbar and then click Properties 2 Click the Notification Are...

Page 10: ...plan Click the battery meter icon in the notification area and then select a power plan from the list or Select Start Control Panel System and Maintenance Power Options and then select a power plan from the list Customizing power plans 1 Click the battery meter icon in the notification area and then click More power options or Click Start Control Panel System and Maintenance Power Options 2 Select...

Page 11: ...ep or Hibernation follow these steps 1 Select Start Control Panel System and Maintenance Power Options 2 In the left pane click Require a password on wakeup 3 Click Change Settings that are currently unavailable 4 Click Require a password recommended 5 Click Save changes Setting password protection on wakeup 5 ...

Page 12: ...n f8 hotkey or reconnect the AC adapter You can keep a battery in the computer or in storage depending on how you work Keeping the battery in the computer whenever the computer is plugged into AC power charges the battery and also protects your work in case of a power outage However a battery in the computer slowly discharges when the computer is off and unplugged from external power WARNING To re...

Page 13: ...ion Battery Check tool to test battery performance Information on calibration power management and proper care and storage to maximize battery life Information on battery types specifications life cycles and capacity To access Battery information Select Start Help and Support Learning Center Battery information Finding battery information in Help and Support 7 ...

Page 14: ...lity Center Click the battery meter icon and then click Windows Mobility Center or Select Start Control Panel Mobile PC Windows Mobility Center 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 8 Ch...

Page 15: ...e battery 1 Turn the computer upside down on a flat surface 2 Insert the battery into the battery bay 1 and rotate the battery downward until it is seated 2 The battery release latch 3 automatically locks the battery into place To remove the battery 1 Turn the computer upside down on a flat surface 2 Slide the battery release latch 1 to release the battery 3 Pivot the battery 2 upward and remove i...

Page 16: ...ollow these recommendations If you are charging a new battery charge it fully before turning on the computer Charge the battery until the battery light turns off NOTE If the computer is on while the battery is charging the battery meter in the notification area may show 100 percent charge before the battery is fully charged Allow the battery to discharge below 5 percent of a full charge through no...

Page 17: ... computer reaches a low battery level the battery light blinks If a low battery level is not resolved the computer enters a critical battery level and the battery light continues to blink The computer takes the following actions for a critical battery level If Hibernation is enabled and the computer is on or in the Sleep state the computer initiates Hibernation If Hibernation is disabled and the c...

Page 18: ...ery level when a charged battery is available 1 Turn off the computer or initiate Hibernation 2 Remove the discharged battery and then insert a charged battery 3 Turn on the computer Resolving a low battery level when no power source is available Initiate Hibernation or Save your work and shut down the computer Resolving a low battery level when the computer cannot exit Hibernation When the comput...

Page 19: ...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 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 Under the current power plan click Ch...

Page 20: ...saving timeouts expect the following performance from the 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 discharge a battery 1 Unplug the computer from its external power source but do not turn off the computer 2 Run the computer on battery powe...

Page 21: ...AUTION Failure to reenable Hibernation after calibration may result in a full battery discharge and information loss if the computer reaches a critical battery level 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 Under the current power plan click Change plan settings 3 Reenter the setti...

Page 22: ... when you are not using them Disconnect external devices that are not plugged into an external power source when you are not using them Stop disable or remove any external media cards that you are not using Use the fn f7 and fn f8 hotkeys to adjust screen brightness as needed If you leave your work initiate Sleep or Hibernation or shut down the computer 16 Chapter 2 Using battery power ...

Page 23: ...iods 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 Calibrate a battery before using it if it has been stored for one month or more Storing a battery 17 ...

Page 24: ...t the external contacts on a battery or dispose of a battery in fire or water Do not expose a battery to temperatures above 60 C 140 F Replace the battery only with a battery approved for this computer Refer to the Regulatory Safety and Environmental Notices for battery disposal information 18 Chapter 2 Using battery power ...

Page 25: ...t charge the computer battery while you are onboard aircraft When you are charging or calibrating a battery When you are installing or modifying system software When you are writing information to a CD or DVD When you connect the computer to external AC power the following events occur The battery begins to charge If the computer is turned on the battery meter icon in the notification area changes...

Page 26: ...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 Plug the AC adapter into the power connector 1 on the computer 2 Plug the power cord into the AC ada...

Page 27: ...sed and disconnected from external power for an extended period To shut down the computer NOTE If the computer is in the Sleep state or in Hibernation you must first exit Sleep or Hibernation before shutdown is possible 1 Save your work and close all open programs 2 Click Start and then click the arrow next to the Lock button 3 Click Shut Down If the computer is unresponsive and you are unable to ...

Page 28: ...atteries 10 13 connection external power 20 conservation power 16 critical battery level 11 D drive media 1 H Hibernation exiting 2 initiated during critical battery level 11 initiating 2 L low battery level 11 O operating system 21 P power connecting 20 conserving 16 R readable media 1 S shutdown 21 shutting down 21 Sleep exiting 1 initiating 1 storing battery 17 T temperature 17 traveling with t...

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