Compaq tc4400 Power

Compaq tc4400 Manual

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  • Compaq tc4400 | Power - Page 1
    Power Document Part Number: 405776-001 May 2006 This guide explains how the computer uses power.
  • Compaq tc4400 | Power - Page 2
    Initiating standby, hibernation or shutdown 3-3 When you leave your work 3-3 When a reliable power supply is unavailable 3-3 When using wireless communication, or readable or writable drive media 3-4 4 Default power settings Turning the computer or display on or off 4-2 Using emergency shutdown
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    6 Processor performance controls 7 Battery packs Identifying battery packs 7-2 Inserting or removing the primary battery pack 7-3 Charging multiple battery packs 7-5 Charging a battery pack 7-6 Monitoring the charge of a battery pack 7-7 Managing low-battery conditions 7-9 Identifying low
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    1 Power control and light locations The following illustration and table identify and describe the power control and light locations. ✎ Your computer may look slightly different from the illustration in this chapter. Power 1-1
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    hibernation, slide toward the front of the computer and release to exit hibernation. If the computer has stopped responding and Microsoft® Windows® shutdown procedures cannot be used, slide the power switch toward the front of the computer and hold for 5 seconds to turn off the computer. (Continued
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    pack is close to full charge capacity. Blinking amber: A battery pack that is the only available power source has reached a low-battery condition. When the battery reaches a critical low-battery condition, the battery light begins blinking rapidly. Off: If the computer is plugged into an external
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    the computer Install or modify system software or write to a CD or DVD Recommended power source ■ Charged battery pack in the computer ■ External power supplied through one of the following devices: ❐ AC adapter included with the computer ❐ Optional docking device ❐ Optional power adapter External
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    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 your power cord, plug the cord into a grounded (earthed) 3-pin outlet. Do not
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    battery discharge, do not leave 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
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    is in hibernation: ■ Do not dock the computer in or undock the computer from a docking device. ■ Do not add or remove memory modules. ■ Do not insert or remove any hard drives or optical drives. ■ Do not connect or disconnect external devices. ■ Do not insert or remove an external media card
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    in random access memory (RAM), and then the screen is cleared. When the computer is in standby, it uses less power than when it is on. Your work returns instantly to the screen when you resume from standby. Initiating hibernation saves your work to a hibernation file on the hard drive, and then
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    power supply is uncertain, take one of the following actions: ■ Save your work, and then initiate standby. ■ Initiate hibernation. ■ Shut down the computer. When using wireless communication, or readable or writable drive media Ä CAUTION: To prevent possible audio with infrared, Bluetooth®, and WLAN
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    4 Default power settings This section explains the default standby, hibernation, and shutdown procedures. For information about changing the function of some of the power features on the computer, refer to "Power options." The controls and lights discussed in this chapter are illustrated in "Power
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    Default power settings Turning the computer or display on or off Task Procedure Result Turn on the computer. Slide the power switch toward the front of the computer. ■ The power lights are turned on. ■ The operating system loads. Shut down the computer. 1. Save your work and close all open
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    , select Shut Down > Turn Off. ■ Slide the power switch toward the front of the computer and hold for at least 5 seconds. ■ Disconnect the computer from external power and remove the battery pack. For more information about removing and storing the battery pack, refer to "Battery packs." Power 4-3
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    (default setting). ■ Power settings and timeouts can be changed using Power Options in Windows Control Panel. Resume from user-initiated or system-initiated standby. Slide the power switch toward the ■ The power lights front of the computer. are turned on. ■ Your work returns to the screen
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    Start > Turn Off Computer. Then, hold down the shift key as you select Hibernate. In Windows XP Professional, if hibernate is not displayed: 1. Click the up or down arrow. 2. Select Hibernate from the list. 3. Click OK.* Result ■ The power lights are turned off. ■ The screen clears. (Continued
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    (s) reach a critical low-battery condition. ■ The power lights are turned off. ■ The screen clears. ✎ Power settings and timeouts can be changed using Power Options in Windows Control Panel. Restore from user-initiated or system-initiated hibernation. Slide the power switch toward the front of
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    options You can change many default power settings in Windows Control Panel. For example, you can set an audio alert to warn you when the battery pack reaches a low-power condition, or you can change the default settings for the power switch. By default, when the computer is on: ■ Pressing fn+f3
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    Power Meter icon By default, the Power Meter icon appears in the notification area, at the far right of the taskbar. The icon changes shape to indicate whether the computer is running on battery or external power. To remove the Power Meter icon from the notification area: 1. Right-click the Power
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    , depending on whether the computer is running on battery or external power. You can also set a power scheme that initiates standby or turns off the display or hard drive after a time interval that you specify. To set a power scheme: 1. Right-click the Power Meter icon in the notification area, and
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    some cases, a computer may operate at a higher speed on external power than on battery power. If the battery power is extremely low, the computer may attempt to conserve power by reducing processor speed and graphics performance. Windows XP enables you to manage the processor performance controls by
  • Compaq tc4400 | Power - Page 23
    battery power for the available power schemes. Power scheme Processor performance Processor performance while on external power while on battery power Home/Office Desk Always runs at the highest performance state. Performance state is determined based on CPU demand. Portable/Laptop (default
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    , 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 pack and is running on external AC power supplied through the AC adapter, the computer switches to battery power if the AC adapter is
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    supports up to 2 battery packs: ■ One primary lithium-ion battery pack is included with the computer. ■ An optional accessory battery pack can be attached to the bottom of the computer. If the computer will be unused and disconnected from external power for more than 2 weeks, remove the battery
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    Ä CAUTION: To prevent loss of information when removing a battery pack that is the sole power source, initiate hibernation or turn off the computer before removing the battery pack. ✎ Battery packs may vary in appearance by model. To insert a primary battery pack: 1. Turn the computer upside down on
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    Battery packs To remove a primary battery pack: 1. Turn the computer upside down on a flat surface, with the front of the computer toward you. 2. Slide the battery release latch 1 toward the rear of the computer. 3. Lift and remove the battery pack 2 from the computer. 7-4 Power
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    Optional accessory battery 2. Primary battery in the computer battery bay While a battery pack is charging, the battery light on the computer is amber. When the battery pack is almost fully charged, the battery light is green. The light is turned off when all battery packs are fully charged. Power
  • Compaq tc4400 | Power - Page 29
    included with the computer ■ Optional docking device ■ Optional power adapter Å WARNING: To reduce potential safety issues, use only the AC adapter provided with the computer, a replacement AC adapter provided by HP, or a Smart AC adapter purchased as an accessory from HP. ✎ Older AC adapters will
  • Compaq tc4400 | Power - Page 30
    computer charges whenever the computer is plugged into external power through an AC adapter, an optional docking device, or an optional power adapter. A battery pack inserted in the computer charges whether the computer is off or in use, but the battery pack charges faster while the computer is off
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    packs Displaying charge information on the screen This section explains how to access and interpret battery charge indicators. Viewing charge displays To view information about the status of any battery pack in the computer: ■ Double-click the Power Meter icon on the notification area, at the
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    the alerts and system responses set at the factory. Some low-battery condition 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 conditions This section explains how to identify
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    , connect one of the following: ■ AC adapter included with the computer ■ Optional docking device ■ 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
  • Compaq tc4400 | Power - Page 34
    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 sliding the power switch toward the front of the computer. Calibrating
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    AC adapter, an optional power adapter, or optional docking device, and then plug the adapter or device into external power. The battery light on the computer is turned on. 3. Leave the computer plugged into external power until the battery pack is fully charged. The battery light on the computer is
  • Compaq tc4400 | Power - Page 36
    the discharge process: ❏ The monitor will not turn off automatically. ❏ Hard drive speed will not decrease automatically while the computer is idle. ❏ System-initiated standby will not occur. To fully discharge a battery pack: 1. Right-click the Power Meter icon in the notification area, at the far
  • Compaq tc4400 | Power - Page 37
    computer is off. 2. If the computer is off, turn it on when the battery pack is fully charged and the battery light is turned off. 3. Select Start > Control Panel > Performance and Maintenance > Power Options > Power Schemes tab. 4. Reenter the settings that you recorded for the items in the Plugged
  • Compaq tc4400 | Power - Page 38
    network (LAN) connections, and exit modem software when you are not using it. ■ Disconnect external devices you are not using that are not plugged into an external power source. ■ Stop, disable, or remove any external media cards you are not using. ■ Use the fn+f9 and fn+f10 hotkeys to adjust screen
  • Compaq tc4400 | Power - Page 39
    by HP, or a compatible battery pack purchased as an accessory from HP. Ä CAUTION: To prevent damage to a battery pack, do not expose it to high temperatures for extended periods of time. If a computer will be unused and unplugged from external power for more than 2 weeks, remove the battery pack
  • Compaq tc4400 | Power - Page 40
    ; or dispose of a battery pack in fire or water. Do not expose a battery pack to temperatures above 60°C (140°F). Replace the battery pack only with a battery pack approved for this computer. Refer to Regulatory, Safety and Environmental Notices for battery pack disposal information. Power 7-17
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    14 removing 7-4 storing 7-1, 7-16 battery power conserving 7-15 low-battery conditions 7-9, 7-10 See also battery pack battery release latch 7-4 C calibration, battery 7-11 conserving power 7-15 critical low-battery condition identifying 7-9 restoring from 7-10 D display switch 4-2, 5-1 E emergency
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    4-4 L lightning bolt icon 7-8 low-battery conditions identifying 7-9 resolving 7-10 P password, setting a 5-3 power See also battery power power lights 1-3 Power Meter icon 5-2 power scheme, setting a 5-3 power switch 1-2, 7-11 power, switching between AC and battery 7-1 R restoring from hibernation
  • Compaq tc4400 | Power - Page 43
    and Windows are U.S. registered trademarks of Microsoft Corporation. Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. The information contained herein is subject to change without notice. The only warranties for HP products and services are
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Power
Document Part Number: 405776-001
May 2006
This guide explains how the computer uses power.