HP EliteBook 2740p Base Model Tablet PC User Manual Page 84
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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 optional 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.
● When you are charging or calibrating a battery
●
When you are installing or modifying system software
●
When you are writing information to a CD or DVD
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 fn+f10 hotkey 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, follow these steps:
1. Plug the AC adapter into the power connector (1) on the computer.
2. Plug the power cord into the AC adapter (2).
72 Chapter 6 Power management
- HP EliteBook 2740p User Guide 1
- Safety warning notice 3
- Table of contents 5
- 1Features 13
- 2 Chapter 1 Features 14
- Identifying hardware 3 15
- Buttons and switches 16
- Identifying hardware 5 17
- Front components 18
- Right-side components 19
- Left-side components 20
- Rear components 21
- Bottom components 22
- Identifying hardware 11 23
- 12 Chapter 1 Features 24
- Identifying hardware 13 25
- Identifying the labels 26
- 2 Using the tablet 27
- Rotating the display 28
- Notebook mode 30
- Rotating the display 19 31
- 3Networking 32
- Using the wireless controls 33
- Using the wireless button 33
- Using a WLAN 36
- Connecting to a WLAN 37
- Roaming to another network 38
- Inserting a SIM 39
- Removing a SIM 40
- Network icon is not displayed 44
- WLAN connection is very weak 45
- Connecting a modem cable 46
- Selecting a location setting 47
- 8. Click OK twice 50
- 38 Chapter 3 Networking 50
- Using pointing devices 52
- Using the pen 55
- Pressure sensitivity 56
- Calibrating the pen 57
- Using the pen holder 57
- Setting pen preferences 58
- Tapping (or clicking) 58
- Flicking 58
- Dragging 59
- Scrolling 59
- Rotating 60
- Pinching 61
- Using touch screen settings 62
- Using the keyboard 63
- Using hotkeys 65
- Initiating Sleep 66
- Switching the screen image 66
- Decreasing screen brightness 67
- Increasing screen brightness 67
- Using HP Quick Launch Buttons 68
- Using HP QuickLook 70
- Using HP QuickWeb 71
- 5 Multimedia 72
- Multimedia software 73
- Checking your audio functions 75
- 64 Chapter 5 Multimedia 76
- Webcam tips 78
- Adjusting webcam properties 78
- 6 Power management 81
- Using the battery meter 82
- Using power plans 82
- Customizing power plans 83
- Using external AC power 84
- Using battery power 85
- Using Battery Check 86
- Charging a battery 87
- Managing low battery levels 88
- Calibrating a battery 89
- Step 3: Discharge the battery 90
- Conserving battery power 91
- Storing a battery 92
- Disposing of a used battery 92
- Replacing the battery 92
- Testing an AC adapter 93
- Shutting down the computer 93
- Identifying installed drives 95
- Handling drives 96
- Using Disk Defragmenter 97
- Using Disk Cleanup 97
- Using HP 3D DriveGuard 98
- 8. Replace the battery 103
- 10. Turn on the computer 103
- 8 External devices 104
- Using USB legacy support 105
- Using a 1394 device 106
- Using external drives 107
- Using the docking connector 108
- 9 External media cards 109
- Removing a digital card 110
- Configuring an ExpressCard 111
- Inserting an ExpressCard 111
- Removing an ExpressCard 112
- Inserting a smart card 113
- Removing a smart card 114
- 10 Memory modules 115
- 11 Security 119
- Using passwords 120
- BIOS administrator password 121
- Setting a DriveLock password 124
- Entering a DriveLock password 124
- Changing a DriveLock password 124
- Removing DriveLock protection 125
- Securing system devices 127
- Using antivirus software 129
- Using firewall software 130
- Installing critical updates 131
- 120 Chapter 11 Security 132
- Installing a security cable 133
- 12 Software updates 134
- Updating the BIOS 136
- Downloading a BIOS update 137
- Updating programs and drivers 139
- 13 Backup and recovery 140
- Backing up your information 141
- Performing a recovery 143
- Using f11 144
- 14 Computer Setup 146
- Computer Setup menus 147
- File menu 148
- Security menu 148
- System Configuration menu 149
- Computer Setup menus 139 151
- Computer Setup menus 141 153
- 15 MultiBoot 154
- 16 Management and printing 160
- Enabling the iAMT solution 164
- Change Intel ME Password 165
- 17 Cleaning guidelines 167
- Cleaning procedures 168
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