HP C399XX, C310EA, C305LA, C300 Resolving low-battery conditions, When external power is available

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Resolving low-battery conditions

CAUTION To reduce the risk of losing information when the computer reaches a critical low- battery condition and has initiated hibernation, do not restore power until the power lights are turned off.

When external power is available

To resolve a low-battery condition when external power is available, connect one of the following adapters:

AC adapter

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-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 resolve a low-battery condition when the computer lacks the power to restore from hibernation:

1.Insert a charged battery pack or plug the computer into external power.

2.Restore from hibernation by pressing the power button.

44 Chapter 3 Power

ENWW

Image 50 Contents
Page First Edition July Document Part Number Table of contents Power Drives MultimediaExternal Devices Memory ModulesComponents Select Hardware tab Device ManagerTop components KeysTouchPad Buttons and switches Lights Front components Display componentsRear components Right-side components Left-side components Bottom components Wireless antennae select models only Additional hardware components Labels Operating environment SpecificationsRated input power TouchPad and Keyboard TouchPadSetting TouchPad preferences Using the TouchPadUsing an external mouse Keyboard HotkeysDisplay and clear system information fn+esc Hotkey proceduresHotkey quick reference Open a Web browser fn+f3 Open the Help and Support Center fn+f1Open the Print Options window fn+f2 Switch the screen image fn+f4 Initiate standby fn+f5Increase screen brightness fn+f8 Initiate QuickLock fn+f6Decrease screen brightness fn+f7 Play, pause or resume an audio CD or a DVD fn+f9Quick Launch Buttons software Accessing the Quick Launch Buttons control panelSetting tiling preferences Setting advanced preferences Displaying the Quick Launch Buttons iconSetting button assignments on an external keyboard Enabling and disabling the embedded numeric keypad Using the embedded numeric keypadKeypads Enabling or disabling num lock mode as you work Using an external numeric keypadSwitching key functions on the embedded numeric keypad Power Power control and light locationsPower Power sources Task Recommended power sourceConnecting the AC adapter Hibernation Standby and hibernationStandby Initiating standby, hibernation or shutdown When you leave your workWhen a reliable power supply is unavailable Enww Turning the computer or display on or off Default power settingsUsing emergency shutdown procedures Initiating or resuming from standby Select Start Turn Off Computer Stand byInitiating or restoring from hibernation HibernateDisplaying the Power Meter icon Power optionsAccessing Power Options Properties Setting or changing a power scheme Setting a security promptProcessor performance while on battery power Processor performance controlsBattery packs Inserting or removing a battery packCharging a battery pack Obtaining accurate charge information Monitoring the charge of the battery packInterpreting charge indicators Displaying charge information on the screenLow-battery condition Managing low-battery conditionsIdentifying low-battery conditions Critical low-battery conditionWhen a charged battery pack is available Resolving low-battery conditionsWhen external power is available When no power source is availableHow to calibrate Calibrating a battery packWhen to calibrate Charging the battery packDischarging the battery pack Recharging the battery pack Conserving battery powerConserving power as you work Selecting power conservation settings Storing a battery packDisposing of a used battery pack Drives Drive careIDE drive light Hard drive Enww Tighten the hard drive cover screws Optical drives DVD-ROM CD-RW DVD±RW/RInserting an optical disc Removing an optical disc with power Removing an optical disc without power Avoiding standby or hibernation Multimedia hardware Using the optical driveIdentifying the installed optical drive Inserting an optical disc Removing an optical disc with power Removing an optical disc without power Using media activity hotkeys Using the audio-out headphone jack Using the audio featuresUsing the audio-in microphone jack Adjusting the volume Using the video features Using the external monitor portUsing the S-Video-out jack Multimedia software Identifying preinstalled multimedia softwareInstalling multimedia software from a CD select models only Using multimedia software Protecting playback Protecting the CD or DVD write processChanging DVD region settings Observing the copyright warningUsing a USB device Connecting a USB deviceStopping a USB device Required USB softwareMemory Modules Adding or replacing memory modulesAdding or replacing memory modules Enww Effects of increasing memory Index Keyboard WlanUSB
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