HP Pavilion Dm4 1200 Entertainment Notebook Pc Series Manual

							Initiating and exiting Hibernation
The system is set at the factory to initiate Hibernation after 1,080 minutes (18 hours) of inactivity
when running on either battery power or 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:
▲Click Start, click the arrow next to the Shut down button, and then click Hibernate.
To exit Hibernation:
▲Briefly press the power button.
The power lights turn on and your work returns to the screen where you stopped working.
NOTE:If you have set a password to be required on wakeup, you must enter your Windows
password before your work will return to the screen.
Using the battery meter
The battery meter is located in the notification area, at the far right of the taskbar. The battery meter
allows you to quickly access power settings, view remaining battery charge, and select a different
power plan.
●To display the percentage of remaining battery charge and the current power plan, move the
pointer over the battery meter icon.
●To access Power Options, 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 low battery level, critical battery level,
or reserve battery level.
To hide or display the battery meter icon:
1.Right-click the Show hidden icons icon (the arrow at the left side of the notification area).
2.Click Customize notification icons.
3.Under Behaviors, select Show icons and notifications for the Power icon.
4.Click OK.
Using power plans
A power plan is a collection of system settings that manages how the computer uses power. Power
plans can help you conserve power or maximize performance.
You can change power plan settings or create your own power plan.
Viewing the current power plan
▲Click the battery meter icon in the notification area, at the far right of the taskbar.
– or –
Select Start > Control Panel > System and Security > Power Options.
Setting power options 51 
						

							Selecting a different power 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 Security > 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 –
Select Start > Control Panel > System and Security > Power Options.
2.Select a power plan, and then click Change plan settings.
3.Change the settings as needed.
4.To change additional settings, click Change advanced power settings and make your
changes.
Setting password protection on wakeup
To set the computer to prompt for a password when the computer exits Sleep or Hibernation, follow
these steps:
1.Select Start > Control Panel > System and Security > 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).
NOTE:If you need to create a user account password or change your current user account
password, click Create or change your user account password, and then follow the on-
screen instructions. If you do not need to create or change a user account password, go to step
5.
5.Click Save changes.
Using external AC power
External AC power is supplied through one of the following devices:
WARNING!To reduce potential safety issues, use only the AC adapter provided with the computer,
a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.
●Approved AC adapter
●Optional docking device or expansion product
Connect the computer to external AC power under any of the following conditions:
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							WARNING!Do not 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, DVD, or BD
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 appearance.
When you disconnect external AC power, the following events occur:
●The computer switches to battery power.
●The display brightness is automatically decreased to save battery life. To increase display
brightness, press the f3 action key or reconnect the AC adapter.
Connecting the AC adapter
WARNING!To reduce the risk of electric shock or damage to the equipment:
Plug the power cord into an AC outlet that is easily accessible at all times.
Disconnect power from the computer by unplugging the power cord from the AC outlet (not by
unplugging the power cord from the 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 adapter (2).
3.Plug the other end of the power cord into an AC outlet (3).
Using external AC power 53 
						

							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.
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.
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							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:
1.Turn the computer upside down on a flat surface, with the battery bay toward you.
2.Align the front of the battery with the outer edge of the battery bay (1).
Using battery power 55 
						

							3.Rotate the battery into the battery bay until it is seated (2). The battery release latch
automatically locks the battery into place (3).
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.
NOTE:The battery release latch automatically returns to its original position.
3.Pivot the battery (2) upward and remove it from the computer (3).
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							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.
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.
Using battery power 57 
						

							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.
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.
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
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							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.
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.
Using battery power 59 
						

							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.
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.
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.
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