HP Probook 640 G1 K4l16ut Aba 14 Notebook User Manual

							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.From the Start screen, type power options, and then select 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 battery 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.
The computer runs on battery power whenever it is not plugged into external AC power. Computer
battery life varies, depending on power management settings, running programs, display brightness,
external devices connected to the computer, and other factors. 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. If the computer contains a charged battery and is running on external AC
power, the computer automatically switches to battery power if the AC adapter is disconnected on the
computer or an AC power loss occurs.
NOTE:When you disconnect AC power, the display brightness is automatically decreased to save
battery life. Select computer models can switch between graphic modes to increase battery life. For
more information, see 
Switchable graphics/dual graphics (select models only) on page 46.
Finding additional battery information
HP Support Assistant provides the tools and information about the battery. To access battery
information, select the HP Support Assistant app on the Start screen, and then select Battery and
performance.
●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:
▲To access battery information, select the HP Support Assistant app on the Start screen, and
then select Battery and performance.
Setting power options 41 
						

							Using Battery Check
HP Support Assistant 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 work properly.
2.To access battery information, select the HP Support Assistant app on the Start screen, and
then select Battery and performance.
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 power meter icon on the Windows desktop in the notification area, at
the far right of the taskbar.
Maximizing battery discharge time
Battery discharge time varies depending on features you use while on battery power. Maximum
discharge time gradually decreases as the battery storage capacity naturally degrades.
Tips for maximizing battery discharge time:
●Lower the brightness on the display.
●Remove the battery on the computer when it is not being used or charged, if the computer
contains a user-replaceable battery.
●Store the user-replaceable battery in a cool, dry location.
●Select the Power saver setting in Power Options.
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. Preferences set
using Power Options do not affect lights.
From the Start screen, type power, select Settings, and then select Power Options.
Identifying low battery levels
When a battery that is the sole power source for the computer reaches a low or critical battery level,
the following behavior occurs:
●The battery light (select models only) indicates a low or critical battery level.
– or –
●The power meter icon in the notification area shows a low or critical battery notification.
NOTE:For additional information about the power meter, see Using the power meter and
power settings on page 40.
If 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.
42 Chapter 6   Power management 
						

							Resolving a low battery level
Resolving a low battery level when external power is available
▲Connect one of the following devices:
●AC adapter
●Optional docking or expansion device
●Optional power adapter purchased as an accessory from HP
Resolving a low battery level when no power source is available
To resolve a low battery level when no power source is available, save your work and shut down the
computer.
Inserting or removing the battery
Inserting a battery
To insert the battery:
1.Turn the computer upside down on a flat surface, with the battery bay toward you.
2.Insert the battery into the battery bay, aligning the tabs on the battery (1) with the notches on the
computer.
3.Tilt the battery (2) down until it is seated, and then slide the battery lock latch (3) to lock the
battery into place.
Removing a battery
To remove the battery:
CAUTION:Removing a battery that is the sole power source for the computer can cause loss of
information. To prevent loss of information, save your work and shut down the computer through
Windows before removing the battery.
1.Turn the computer upside down on a flat surface, with the battery bay toward you.
2.Slide the battery lock latch (1), and then slide the battery release latch (2) to release the battery.
Setting power options 43 
						

							3.Tilt the battery upward (3) and remove it from the computer (4).
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 memory 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
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
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, type support, and then select the HP Support Assistant app. To
access battery information, select the HP Support Assistant app on the Start screen, and then select
Battery and performance.
44 Chapter 6   Power management 
						

							Replacing a user-replaceable battery
Battery Check 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.
Connect the computer to external AC power under any of the following conditions:
●When charging or calibrating a battery
●When installing or modifying system software
●When writing information to a CD, a DVD, or a BD (select models only)
●When running Disk Defragmenter
●When performing a backup or recovery
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 power 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.
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 does not turn on.
●The display does not turn on.
●The power lights are off.
To test the AC adapter:
NOTE:The following instructions apply to computers with user-replaceable batteries.
1.Shut down the computer.
2.Remove the battery on the computer.
Setting power options 45 
						

							3.Connect the AC adapter to the computer, and then plug it into an AC outlet.
4.Turn on the computer.
●If the power lights turn 
on, the AC adapter is working properly.
●If the power lights remain 
off, the AC adapter is not functioning and should be replaced.
Contact support for information on obtaining a replacement AC power adapter.

Select computers are equipped with either switchable graphics or dual graphics.
●Switchable graphics—Supported by both AMD™ and Intel. If your computer has AMD dynamic
switchable graphics, it supports only switchable graphics.
●Dual graphics—Supported only by AMD. If your computer has AMD Radeon dual graphics, it
supports only dual graphics.
NOTE:Dual graphics can be enabled only by full-screen applications that use DirectX version 10 or
11.
NOTE:To determine whether your computer supports switchable graphics or dual graphics, see
your notebook graphics processor configuration. Intel Central Processing Units (CPUs) and AMD
Accelerated Processing Units (APUs) support switchable graphics. AMD A8, A10, and FX APUs
support dual graphics. AMD A4 and A6 APUs do not support dual graphics.
Both switchable graphics and dual graphics offer two modes for processing graphics:
●Performance mode—Runs application with optimal performance.
●Power Saving mode—Conserves battery life.
Using switchable graphics (select models only)
Switchable graphics allow you to switch between Performance mode and Power Saving mode.
Switchable graphics assigns individual applications to either Performance mode or Power Saving
mode, based on power requirements. You can also manually modify the settings for an individual
application and switch between Performance mode and Power Saving mode.
NOTE:For more information, see the switchable graphics software Help.
Using dual graphics (select models only)
If your system is equipped with dual graphics (two or more added Graphics Processing Units
(GPUs)), you can enable AMD Radeon Dual Graphics to increase application power and performance
for full-screen applications that use DirectX version 10 or 11. For more information about DirectX, go
to 
http://www.microsoft.com/directx.
NOTE:Dual graphics systems only support automatic selection based on power requirements
(Dynamic scheme), and automatically assign Performance mode or Power Saving mode for individual
applications. However, you can manually modify the settings for a particular application. To enable or
disable AMD Radeon Dual Graphics, select or deselect the check box in the AMD Radeon Dual
Graphics section, which is located in the Performance tab in the Catalyst Control Center.
NOTE:For more information, see the AMD software Help.
46 Chapter 6   Power management 
						

							7 External cards and devices
Using memory card readers
Optional memory cards provide secure data storage and convenient data sharing. These cards are
often used with digital media–equipped cameras and PDAs as well as with other computers.
To determine the memory card formats that are supported on your computer, see 
Getting to know
your computer on page 4.
Inserting a memory card
CAUTION:To reduce the risk of damage to the memory card connectors, use minimal force to
insert a memory card.
1.Hold the card label-side up, with the connectors facing the computer.
2.Insert the card into the memory card reader, and then press in on the card until it is firmly
seated.
You will hear a sound when the device has been detected, and a menu of options may be
displayed.
Removing a memory card
CAUTION:To reduce the risk of loss of data or an unresponsive system, use the following
procedure to safely remove the memory card.
1.Save your information and close all programs associated with the memory card.
2.Click the remove hardware icon on the Windows desktop in the notification area, at the far right
of the taskbar. Then follow the on-screen instructions.
Using memory card readers 47 
						

							3.Press in on the card (1), and then remove it from the slot (2).
NOTE:If the card does not eject, pull the card out of the slot.
Using a USB device
Universal Serial Bus (USB) is a hardware interface that can be used to connect an optional external
device, such as a USB keyboard, mouse, drive, printer, scanner, or hub.
Some USB devices may require additional support software, which is usually included with the
device. For more information about device-specific software, see the manufacturer's instructions.
These instructions may be provided with the software, on disc, or on the manufacturer’s website.
The computer has at least 1 USB port that supports USB 1.0, 1.1, 2.0, or 3.0 devices. Your computer
may also have a USB charging port that provides power to an external device. An optional docking
device or USB hub provides additional USB ports that can be used with the computer.
Connecting a USB device
CAUTION:To reduce the risk of damage to a USB connector, use minimal force to connect the
device.
▲Connect the USB cable for the device to the USB port.
NOTE:The following illustration may look slightly different than your computer.
You will hear a sound when the device has been detected.
48 Chapter 7   External cards and devices 
						

							NOTE:The first time you connect a USB device, a message in the notification area lets you know
that the device is recognized by the computer.
Removing a USB device
CAUTION:To reduce the risk of damage to a USB connector, do not pull on the cable to remove
the USB device.
CAUTION:To reduce the risk of loss of information or an unresponsive system, use the following
procedure to safely remove the USB device.
1.To remove a USB device, save your information and close all programs associated with the
device.
2.Click the remove hardware icon on the Windows desktop in the notification area, at the far right
of the taskbar, and then follow the on-screen instructions.
3.Remove the device.
Using optional external devices
NOTE:For more information about required software and drivers, or to learn which computer port to
use, see the manufacturer's instructions.
To connect an external device to the computer:
CAUTION:To reduce the risk of damage to the equipment when connecting a powered device, be
sure that the device is turned off and the AC power cord is unplugged.
1.Connect the device to the computer.
2.If you are connecting a powered device, plug the device power cord into a grounded AC outlet.
3.Turn on the device.
To disconnect an unpowered external device, turn off the device, and then disconnect it from the
computer. To disconnect a powered external device, turn off the device, disconnect it from the
computer, and then unplug the AC power cord.
Using optional external drives
Removable external drives expand your options for storing and accessing information. A USB drive
can be added by connecting the drive to a USB port to the computer.
NOTE:HP external USB optical drives should be connected to the powered USB port to the
computer.
USB drives include the following types:
●1.44-megabyte diskette drive
●Hard drive module
●External optical drive (CD, DVD, and Blu-ray)
●MultiBay device
Using optional external devices 49 
						

							8Drives
Handling drives
CAUTION:Drives are fragile computer components that must be handled with care. Refer to the
following cautions before handling drives. Additional cautions are included with the procedures to
which they apply.
Observe these precautions:
●Before you move a computer that is connected to an external hard drive, initiate Sleep and allow
the screen to clear, or properly disconnect the external hard drive.
●Before handling a drive, discharge static electricity by touching a grounded surface.
●Do not touch the connector pins on a removable drive or on the computer.
●Handle a drive carefully; do not drop a drive or place items on it.
●Before removing or inserting a drive, shut down the computer. If you are unsure whether the
computer is off, in the Sleep state, turn the computer on, and then shut it down through the
operating system.
●Do not use excessive force when inserting a drive into a drive bay.
●Do not type on the keyboard or move the computer while an optical drive is writing to a disc. The
write process is sensitive to vibration.
●Avoid exposing a drive to temperature or humidity extremes.
●Avoid exposing a drive to liquids. Do not spray the drive with cleaning products.
●Remove media from a drive before removing the drive from the drive bay, or traveling with,
shipping, or storing a drive.
●If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective
packaging and label the package “FRAGILE.”
●Avoid exposing a drive to magnetic fields. Security devices with magnetic fields include airport
walk-through devices and security wands. Airport conveyer belts and similar security devices
that check carry-on baggage use X-rays instead of magnetism and do not damage drives. 
Using hard drives
CAUTION:To prevent information loss or an unresponsive system:
Save your work and shut down the computer before adding or replacing a memory module or hard
drive.
If you are not sure whether the computer is off, turn the computer on by pressing the power button.
Then shut down the computer through the operating system.
50 Chapter 8   Drives