Power Management User Guide
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Table of contents 1 Power control and light locations 2 Setting power options Using power-saving states ................................................................................................................... 3 Initiating and exiting Suspend .............................................................................................. 3 Initiating and exiting Hibernation .......................................................................................... 4 Using the Power icon ............
Index ...................................................................................................................................................................
1 Power control and light locations The following illustration and table identify and describe the power control and light locations. Component Description (1) fn+f5 Initiates Suspend. (2) Internal display switch Turns off the display if the display is closed while the power is on.
(3) Component Description Power button ● When the computer is off, press the button to turn on the computer. ● When the computer is on, press the button to shut down the system. ● When the computer is in the Suspend state, press the button briefly to exit Suspend. ● When the computer is in Hibernation, press the button briefly to exit Hibernation.
2 Setting power options Using power-saving states The computer has two power-saving states enabled at the factory: Suspend and Hibernation. When Suspend is initiated, the power light blinks and the screen clears. Your work is saved to memory, letting you exit Suspend faster than exiting Hibernation. If the computer is in the Suspend state for an extended period or if the battery reaches a critical battery level while in the Suspend state, the computer initiates Hibernation.
Initiating and exiting Hibernation Power settings and timeouts can be changed using Power Management in Control Center. With the computer on, you can initiate Hibernation in any of the following ways: ● Briefly press the power button. ● Click Computer, click Shutdown, and then click Hibernation. ● Click the Power icon located on the far right of the task bar, and then click Hibernation. ▲ To exit Hibernation: Briefly press the power button.
3 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: WARNING! Do not charge the computer battery while you are onboard aircraft.
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) 3pin outlet.
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 light is off. To test the AC adapter: 1. Remove the battery from the computer. a. Turn the computer upside down on a flat surface, with the battery bay toward you. b. Slide the left and right battery release latches (1) inward. c. Remove the battery (2). 2.
4 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.
2. Slide the battery into the battery bay (1) until the battery latches (2) automatically lock the battery into place. To remove the battery: 1. Turn the computer upside down on a flat surface, with the battery bay toward you. 2. Slide the left and right battery release latches (1) inward. 3. Remove the battery (2). 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, or an optional expansion product. 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.
Managing low battery levels The information in this section describes the alerts and system responses set at the factory. Some lowbattery alerts and system responses can be changed using Power Management in Control Center. Preferences set using Power Management 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.
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.
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.
Conserving battery power ● Select Powersave in Power Management under System Settings. ● Turn off wireless and local area network (LAN) connections and exit modem programs 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.
5 Shutting down the computer CAUTION: Unsaved information will be lost when the computer is shut down. The Shutdown command closes all open programs, including the operating system, and then turns off the display and computer.
Index A AC adapter testing 7 AC adapter, connecting 6 B battery charging 9 disposing 14 inserting 8 removing 8 replacing 14 storing 14 battery charge, maximizing 10 battery check 14 battery light 9 battery power 8 battery release latches 8 battery temperature 14 button, power 2 C charging batteries 9 connection, external power 6 D drive media 3 H Hibernation exiting 4 initiating 4 hotkeys initiating Suspend L lights power 2 16 Index 1 P power battery 8 connecting 6 control and light locations 1 power
