HP Pavilion Dv3 4300 Entertainment Notebook Pc Series Manual

							3.Plug the other end of the power cord into an AC outlet (3).
Testing an AC adapter
Test the AC adapter if the computer exhibits any of the following symptoms when it is connected to
AC power:
●The computer will not turn on.
●The display does not turn on.
●The power lights are off.
To test the AC adapter:
1.Remove the battery from the computer.
2.Connect the AC adapter to the computer, and then plug it into an AC outlet.
3.Turn on the computer.
If the power lights turn on, the AC adapter is working properly.
Contact technical support for information on obtaining a replacement AC power adapter. Select Start
> Help and Support > Get assistance.
Using battery power
When a charged battery is in the computer and the computer is not plugged into external power, the
computer runs on battery power. When the computer is plugged into external AC power, the
computer runs on AC power.
If the computer contains a charged battery and is running on external AC power supplied through the
AC adapter, the computer switches to battery power if the AC adapter is disconnected from the
computer.
NOTE:The display brightness is decreased to save battery life when you disconnect AC power. To
increase display brightness, use the f3 action key 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.
Using battery power 51 
						

							WARNING!To reduce potential safety issues, use only the battery provided with the computer, a
replacement battery provided by HP, or a compatible battery purchased from HP.
Computer battery life varies, depending on power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
Identifying batteries
One lithium-ion battery is included with your computer.
Finding battery information in Help and Support
Help and Support provides the following tools and information about the battery:
●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 > Learn > Power Plans: Frequently Asked Questions.
Using Battery Check
Help and Support provides information on the status of the battery installed in the computer.
To run Battery Check:
1.Connect the AC adapter to the computer.
NOTE:The computer must be connected to external power for Battery Check to function
properly.
2.Select Start > Help and Support > Troubleshoot > Power, Thermal and Mechanical.
3.Click the Power tab, and then click Battery Check.
Battery Check examines the battery and its cells to see if they are functioning properly, and then
reports the results of the examination.
Displaying the remaining battery charge
▲Move the pointer over the battery meter icon in the notification area, at the far right of the
taskbar.
Inserting or removing the battery
CAUTION:Removing a battery that is the sole power source can cause loss of information. To
prevent loss of information, initiate Hibernation or shut down the computer through Windows before
removing the battery.
To insert the battery:
52 Chapter 5   Power management 
						

							▲Align the tabs on the battery with the notches on the computer, insert the battery (1), and then
pivot the battery downward (2) into the battery bay. The battery release latch (3) automatically
locks the battery into place.
To remove the battery:
1.Slide the battery release latch (1) to release the battery.
2.Pivot the battery (2) upward and remove it from the computer (3).
Charging a battery
WARNING!Do not charge the computer battery while you are onboard aircraft.
The battery charges whenever the computer is plugged into external power through an AC adapter,
an optional power adapter, an optional expansion product, or an optional docking device.
The battery charges whether the computer is off or in use, but it charges faster when the computer is
off.
Charging may take longer if a battery is new, has been unused for 2 weeks or more, or is much
warmer or cooler than room temperature.
Using battery power 53 
						

							To prolong battery life and optimize the accuracy of battery charge displays, follow 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 white.
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 normal use before
charging it.
●If the battery has been unused for one month or more, calibrate the battery instead of simply
charging it.
The battery light displays charge status:
●White: The computer is connected to external power and the battery is fully charged.
●Amber: The computer is connected to external power and the battery is charging.
●Blinking: A battery that is the only available power source has reached a low battery level. When
the battery reaches a critical battery level, the battery light continues to blink.
Maximizing battery discharge time
Battery discharge time varies depending on the features you use while on battery power. Maximum
discharge time gradually shortens, as the battery storage capacity naturally degrades.
Tips for maximizing battery discharge time:
●Lower the brightness on the display.
●Check the Power saver setting in Power Options.
●Remove the battery from the computer when it is not being used or charged.
●Store the battery in a cool, dry location.
Managing low battery levels
The information in this section describes the alerts and system responses set at the factory. Some
low-battery alerts and system responses can be changed using Power Options in Windows Control
Panel. Preferences set using Power Options do not affect lights.
Identifying low battery levels
When a battery that is the sole power source for the 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.
54 Chapter 5   Power management 
						

							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 computer is on or in the Sleep state, the computer remains
briefly in the Sleep state, and then shuts down and loses any unsaved information.
Using battery power 55 
						

							Resolving a low battery level
CAUTION:To reduce the risk of losing information when the computer reaches a critical battery
level and has initiated Hibernation, do not restore power until the power lights turn off.
Resolving a low battery level when external power is available
▲Connect one of the following devices:
●AC adapter
●Optional expansion product or docking device
●Optional power adapter
Resolving a low battery 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 computer lacks sufficient power to exit Hibernation, follow these steps:
1.Insert a charged battery or plug the computer into external power.
2.Exit Hibernation by pressing the power button.
Calibrating a battery
Calibrate a battery under the following conditions:
●When battery charge displays seem inaccurate
●When you observe a significant change in battery run time
Even if a battery is heavily used, it should not need to be calibrated more than once a month. It is also
not necessary to calibrate a new battery.
Step 1: Fully charge the battery
WARNING!Do not charge the computer battery while you are onboard aircraft.
NOTE:The battery charges whether the computer is off or in use, but it charges faster when the
computer is off.
56 Chapter 5   Power management 
						

							To fully charge the battery:
1.Insert the battery into the computer.
2.Connect the computer to an AC adapter, optional power adapter, optional expansion product, or
optional docking device, and then plug the adapter or device into external power.
The battery light on the computer turns amber.
3.Leave the computer plugged into external power until the battery is fully charged.
The battery light on the computer turns white.
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 Security > Power Options.
2.Under the current power plan, click Change plan settings.
3.Record the Turn off the display settings listed in the On battery column so that you can reset
them after the calibration.
4.Change the Turn off the display settings to Never.
5.Click Change advanced power settings.
6.Click the plus sign next to Sleep, and then click the plus sign next to Hibernate after.
7.Record the On battery setting under Hibernate after so that you can reset it after the
calibration.
8.Change the On battery setting to Never.
9.Click OK.
10.Click Save changes.
Step 3: Discharge the battery
The computer must remain on while the battery is being discharged. The battery can discharge
whether or not you are using the computer, but the battery will discharge faster while you are using it.
●If you plan to leave the computer unattended during the discharge, save your information before
beginning the discharge procedure.
●If you use the computer occasionally during the discharge procedure and have set energy-
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.
Using battery power 57 
						

							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 power until the battery is discharged. The battery light begins to
blink when the battery has discharged to a low battery level. When the battery is discharged, the
battery light turns off and the computer shuts down.
58 Chapter 5   Power management 
						

							Step 4: Fully recharge the battery
To recharge the battery:
1.Plug the computer into external power and maintain external power until the battery is fully
recharged. When the battery is recharged, the battery light on the computer turns white.
You can use the computer while the battery is recharging, but the battery will charge faster if the
computer is off.
2.If the computer is off, turn it on when the battery is fully charged and the battery light has turned
white.
Step 5: Reenable Hibernation and Sleep
CAUTION: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 Security > Power Options.
2.Under the current power plan, click Change plan settings.
3.Reenter the settings that you recorded for the items in the On battery column.
4.Click Change advanced power settings.
5.Click the plus sign next to Sleep, and then click the plus sign next to Hibernate after.
6.Reenter the setting that you recorded for On battery.
7.Click OK.
8.Click Save changes.
Conserving battery power
●Select the Power saver power plan through Power Options under System and Security in
Windows Control Panel.
●Turn off wireless and local area network (LAN) connections and exit modem applications 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 f2 and f3 action keys to adjust screen brightness as needed.
●If you leave your work, initiate Sleep or Hibernation, or shut down the computer.
Storing a battery
CAUTION:To prevent damage to a battery, do not expose it to high temperatures for extended
periods of time.
Using battery power 59 
						

							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.
NOTE:A stored battery should be checked every 6 months. If the capacity is less than 50 percent,
recharge the battery before returning it to storage.
Calibrate a battery before using it if it has been stored for one month or more.
Disposing of a used battery
WARNING!To reduce the risk of fire or burns, do not disassemble, crush, or puncture; do not short
external contacts; do not dispose of in fire or water.
For additional information, refer to the Regulatory, Safety and Environmental Notices included with
this computer.
Replacing the battery
Computer battery life varies, depending on power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
Battery Check notifies you to replace the battery when an internal cell is not charging properly, or
when the battery storage capacity has reached a “weak” condition. A message refers you to the HP
Web site for more information about ordering a replacement battery. If the battery is possibly covered
by an HP warranty, instructions include a warranty ID.
NOTE:To ensure that you always have battery power when you need it, HP recommends
purchasing a new battery when the storage capacity indicator turns green-yellow.
Shutting down the computer
CAUTION:Unsaved information will be lost when the computer is shut down.
The Shut down command closes all open programs, including the operating system, and then turns
off the display and computer.
Shut down the computer under any of the following conditions:
●When you need to replace the battery or access components inside the computer
●When you are connecting an external hardware device that does not connect to a USB port
●When the computer will be unused and disconnected from external power for an extended
period
Although you can shut down the computer with the power button, the recommended procedure is to
use the Windows Shut down command.
To shut down the computer:
60 Chapter 5   Power management