Hp EliteBook 8770w Mobile Workstation User Manual Page 58
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Conserving battery power
●
From the Start screen, type power, select Settings, and then select Power Options.
●
Select low power-use settings through Power Options:
●
Turn off wireless and LAN connections and exit modem applications when you are not using
them.
●
Disconnect unused external devices that are not plugged into an external power source.
●
Stop, disable, or remove any external media cards that you are not using.
●
Decrease screen brightness.
●
Before you leave your work, initiate Sleep, or shut down the computer.
Storing a user-replaceable battery (select models only)
CAUTION: To reduce the risk of damage to a battery, 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
user-replaceable 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 user-replaceable battery (select models only)
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.
See the Regulatory, Safety and Environmental Notices for proper battery disposal. To access this
guide, from the Start screen, select the HP Support Assistant app, select My computer, and then
select User guides. To access battery information, from the Start screen, select the HP Support
Assistant app, and then select Battery and performance.
Replacing a user-replaceable battery (select models only)
Battery Check in HP Support Assistant 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. If the battery is
possibly covered by an HP warranty, instructions include a warranty ID. A message refers you to the
HP website for more information about ordering a replacement battery.
Using external AC power
WARNING! Do not charge the computer battery while you are onboard aircraft.
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.
NOTE: For information on connecting to AC power, see the Setup Instructions poster provided in
the computer box.
External AC power is supplied through an approved AC adapter or an optional docking or expansion
device.
46 Chapter 6 Power management
- User Guide 1
- Safety warning notice 3
- Table of contents 5
- 1Welcome 13
- Finding information 14
- Finding information 3 15
- TouchPad 16
- Bottom 13 25
- 3 Connecting to a network 27
- Using a WLAN 28
- Setting up a WLAN 29
- Configuring a wireless router 29
- Protecting your WLAN 29
- Connecting to a WLAN 30
- Inserting and removing a SIM 31
- Connecting to a wired network 32
- Using a modem 33
- Using pointing devices 35
- Using TouchPad gestures 36
- Right-edge swipe 40
- Top-edge swipe 40
- Using the keyboard 41
- Identifying the hot keys 43
- Using keypads 45
- 5 Multimedia 46
- Adjusting the volume 47
- Webcam (select models only) 48
- 6 Power management 52
- Initiating and exiting Sleep 53
- Using battery power 54
- Using Battery Check 55
- Managing low battery levels 55
- Using external AC power 58
- Testing an AC adapter 59
- 7 External cards and devices 60
- Configuring an ExpressCard 61
- Inserting an ExpressCard 62
- Removing an ExpressCard 63
- Using a USB device 64
- Connecting a USB device 65
- Removing a USB device 65
- Connecting a 1394 device 66
- Removing a 1394 device 66
- Connecting an eSATA device 67
- Removing an eSATA device 67
- Handling drives 68
- Using hard drives 68
- Removing the service door 69
- Replacing the service door 70
- Replacing a hard drive 76
- Using hard drives 65 77
- Replacing an optical drive 78
- Using Disk Defragmenter 80
- Using Disk Cleanup 80
- Inserting an optical disc 83
- Removing an optical disc 84
- Sharing optical drives 86
- 9Security 87
- Using passwords 88
- Setting a DriveLock password 91
- Entering a DriveLock password 92
- Changing a DriveLock password 92
- Removing DriveLock protection 92
- Using antivirus software 94
- Using firewall software 94
- 10 Maintenance 97
- Cleaning your computer 104
- Updating programs and drivers 105
- 11 Backup and recovery 106
- Performing a system recovery 107
- Using f11 recovery tools 108
- Using HP Software Setup 110
- System Diagnostics 111
- Updating the BIOS 112
- Determining the BIOS version 113
- Downloading a BIOS update 113
- 13 Support 115
- 14 Specifications 117
- A Traveling with the computer 118
- B Troubleshooting 119
- The computer screen is blank 120
- A disc does not play 122
- C Electrostatic discharge 124
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