Compaq nc2400 - Notebook PC, User Manual

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

Page 2: ...ense 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 March 2006 Do...

Page 3: ...ff 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 Battery packs Inserting or removing a battery pack 20 Charging a battery pack 22 M...

Page 4: ...e is available 25 When the computer cannot restore from hibernation 25 Calibrating a battery pack 26 When to calibrate 26 How to calibrate 26 Step 1 Charging the battery pack 26 Step 2 Discharging the battery pack 27 Step 3 Recharging the battery pack 28 Conserving battery power 29 Conserving power as you work 29 Selecting power conservation settings 29 Storing a battery pack 30 Disposing of a use...

Page 5: ... notebook is turned on 2 Power lights 2 On The computer is on Blinking The computer is in standby Off The computer is off or in hibernation 3 Power button 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 ...

Page 6: ...tery 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 There are 2 power lights Both display the same information The light on th...

Page 7: ...ne of the following devices AC adapter included with the computer Optional docking device Optional power adapter Charge or calibrate a battery pack in the computer External power supplied through AC adapter included with the computer Optional docking device Optional power adapter WARNING Do not charge the computer battery pack while onboard aircraft Install or modify system software or write to a ...

Page 8: ...ent 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 power connector 1 on the...

Page 9: ...eave 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 of...

Page 10: ... 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 Us...

Page 11: ...ter When the computer is in hibernation it uses much less power than when it is in standby When the computer will be unused and disconnected from external power for an extended period shut down the computer and remove the battery pack to extend the life of the battery pack For details on battery pack storage refer to Storing a battery pack When a reliable power supply is unavailable Be sure that h...

Page 12: ... Standby and hibernation interfere with the use of Bluetooth and WLAN communication and media Note the following guidelines If the computer is in standby or hibernation you cannot initiate a Bluetooth or WLAN transmission If standby or hibernation is accidentally initiated during playback of a medium such as a CD a DVD or an external media card Your playback may be interrupted You may see the foll...

Page 13: ...ter 1 Save your work and close all open applications 2 Shut down the computer through the operating system by selecting Start Turn Off Computer Turn Off NOTE 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 ...

Page 14: ...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 For more information about removing and storing a battery pack refer to Battery packs 10 Chapter 4 Default power settings ENWW ...

Page 15: ...andby after 10 minutes of computer inactivity default setting If the computer is plugged into external power the system initiates standby after 25 minutes of computer inactivity default setting NOTE Power settings and timeouts can be changed using Power Options in Windows Control Panel The power lights blink The screen clears Resume from user initiated or system initiated standby Press the power b...

Page 16: ...enabled No action required If the computer is running on battery power the system initiates hibernation After 30 minutes of computer inactivity When the battery pack reaches a critical low battery condition NOTE 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 hi...

Page 17: ... display switch turns off the display and initiates standby The display switch is activated by closing the display NOTE When HP Mobile Data Protection has parked a drive the computer will not initiate standby or hibernation and the display will simply be turned off Accessing Power Options Properties To access Power Options Properties Right click the Power Meter icon in the notification area at the...

Page 18: ...st Power Properties 2 Click the Advanced tab 3 Clear the Always show icon on the taskbar check box 4 Click Apply and then click OK To show the Power Meter icon in the notification area 1 Select Start Control Panel Performance and Maintenance Power Options 2 Click the Advanced tab 3 Select the Always show icon on the taskbar check box 4 Click Apply and then click OK NOTE If you cannot see an icon y...

Page 19: ... notification area and then click Adjust Power Properties 2 Click the Power Schemes tab 3 Select the power scheme you want to modify and adjust options in the lists on the screen 4 Click Apply Setting a security prompt You can add a security feature that prompts you for a password when the computer is turned on resumes from standby or restores from hibernation To set a password prompt 1 Right clic...

Page 20: ...16 Chapter 5 Power options ENWW ...

Page 21: ...wer scheme you select determines how the processor performs when the computer is plugged into external power or is running on battery power Each power scheme for external power or battery power sets a specific processor state After a power scheme has been set no other intervention is required to control the performance of the computer processor The following table describes the processor performan...

Page 22: ...attery power Max Battery Performance state is determined based on CPU demand CPU performance is lower when the Max Battery setting is selected however battery life will be extended It is recommended that you use the Portable Laptop power scheme 18 Chapter 6 Processor performance controls ENWW ...

Page 23: ...nnected from the computer NOTE The display brightness is automatically decreased to save battery life when you disconnect AC power To increase display brightness use the fn f10 hotkey or reconnect the 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...

Page 24: ...ace with the battery bay toward you 2 Slide the battery pack 1 into the battery bay until it is seated The battery pack release latches 2 automatically lock the battery pack into place To remove a battery pack 1 Turn the computer upside down on a flat surface with the battery bay toward you 2 Slide the battery pack release latch on the right 1 and then the battery pack release latch on the left 2 ...

Page 25: ...3 Remove the battery pack from the computer 3 ENWW Inserting or removing a battery pack 21 ...

Page 26: ...ter is off Charging may be delayed if a battery pack is new has been unused for 2 weeks or more or is much warmer or cooler than room temperature The battery light displays charge status On The battery pack is charging Blinking The battery pack has reached a low battery condition and is not charging Blinking rapidly The battery pack has reached a critical low battery condition and is not charging ...

Page 27: ...rs Most charge indicators report battery status as both a 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 whe...

Page 28: ...condition the battery light blinksin an amber color Critical low battery condition If a low battery condition is not resolved the computer enters 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 ...

Page 29: ...o 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 battery condition when no power source is available Initiate hibernation or Save your work and shut down the computer When the computer cannot restore from hibernation To ...

Page 30: ...hen fully recharging Step 1 Charging the battery pack A battery pack can charge whether the computer is off or in use but it will charge faster when the computer is off WARNING Do not charge the computer battery pack on board aircraft Charging the battery pack may damage aircraft electronic systems To charge the battery pack 1 Insert the battery pack into the computer 2 Connect the computer to an ...

Page 31: ... 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 Select Start Control Panel Performance and Maintenance Power Options 2 Record th...

Page 32: ...ttery pack is fully charged and the battery light is turned off 3 Select Start Control Panel Performance and Maintenance Power Options 4 Reenter the settings that you recorded for the items in the Plugged in column and the Running on batteries column 5 Click OK CAUTION After calibrating the battery pack reenable hibernation Failure to reenable hibernation may result in a complete battery discharge...

Page 33: ...f10 and fn f9 hotkeys to adjust screen brightness as you need it Use optional powered speakers instead of the internal speakers or adjust system volume as you need it Press fn f4 to switch the screen image from the computer display to an external display device If you leave your work initiate standby or hibernation or shut down the computer Selecting power conservation settings To set the computer...

Page 34: ...eparately To prolong the charge of a stored battery pack place it in a cool dry place Calibrate a battery pack before using it if it has been stored for one month or more Disposing of a used battery pack WARNING To reduce the risk of fire or burns do not disassemble crush or puncture a battery pack short the external contacts on a battery pack or dispose of a battery pack in fire or water Do not e...

Page 35: ...itical low battery condition 24 initiating 12 restoring from 12 when to use 6 hibernation file 6 I infrared communication 8 L lights battery 2 power 1 low battery condition 24 O operating system 9 optional power adapter 3 26 P passwords security 15 power connecting 4 conserving 29 control and light locations 1 schemes 15 setting preferences 13 sources 3 power adapter 3 power button 1 power light 1...

Page 36: ...32 Index ENWW ...

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