Samsung NP-N510-JA02US User Manual

User Guide
SAMSUNG
Chapter 1.
Getting Started
Product Features 2 Before You Start 3 Contents 7 Safety Precautions 8 Proper Posture During Computer Use 24 Important Safety Information 27 Replacement Parts and Accessories 30 Regulatory Compliance Statements 33 WEEE SYMBOL INFORMATION 48 Overview 50 Turning the Computer On and Off 56

Product Features

PC in Hand
Improved portability through its compact size and
Slim, Polished Design
Small but Powerful PC
An Intel “Atom” Processor with Low Power
Consumption and Low Heat
Extended Use Time through the use of Power-
Efcient Parts
Versatile and Convenient Use
A Camera Module for Video Chatting or
Conferencing (Optional)
Wireless LAN and Bluetooth Function (Optional) Multi Card Slot Support (Optional) Easy-to-Use Keyboard
Optional items may be changed or may not be provided depending on the computer model.
2

Before You Start

Before reading the User Guide, rst check the following information.
Optional items, some devices and software referred to in the User Guide may not
be provided and/or changed by upgrade. Note that the computer environment referred in the User Guide may not be the same as your own environment.
Images used in this User Guide may differ from actual product. This guide decribes procedures for using both the mouse and the touchpad. This manual has been written for the Windows operating system. The descriptions
and gures may differ depending on the installed operating system.
The User guide supplied with this computer may vary depending on your model.
Safety Precaution Notations
Icon Notation Description
Warning
Caution
Failing to follow instructions marked with this symbol, may
cause personal injury and or fatality.
Failing to follow instructions marked with this symbol, may
cause slight injury to yourself or damage your property.
3
4
Text Notations
Icon Notation Description
Before You Start
Caution
Note
Content included in this section includes information required before using a function.
Content included in this section includes information required about the function.
Content included in this section includes helpful information to use the function.
Copyright
© 2009 Samsung Electronics Co., Ltd.
Samsung Electronics Co., Ltd. owns the copyright of this manual. No part of this manual may be reproduced or transmitted in any form or by any means,
electronic or mechanical, without the consent of Samsung Electronics Co., Ltd. The information in this document is subject to change without notice due to improving
the performance of the product.
Samsung Electronics shall not be liable for any data loss. Please take care to avoid losing any important data and backup your data to prevent any such data loss.
Precautions for Operating System Support
If a problem occurs because of the reinstallation of other operating systems(OS) or a previous version of a OS pre-installed on this computer, or a software that does not support the OS, the company will not provide technical support, a replacement or refund, and if our service engineer visits you due to this problem, a service charge will be applied.
Performance Restrictions
z Online games and some games(3D,2D) may not be supported and Full HD video
and some high bit rate HD video playback may be slow and stutter on this computer.
There is one memory slot provided on this computer. It supports 2GB memory
x
max. To upgrade to 2GB memory, replace the current memory with a 2GB memory module.
About the Product Capacity Representation Standard
About HDD Capacity Representation
The capacity of the storage device (HDD, SSD) of the manufacturer is calculated assuming that 1KB=1,000 Bytes.
However, the operating system (Windows) calculates the storage device capacity assuming that 1KB=1,024 Bytes, and therefore the capacity representation of the HDD in Windows is smaller than the actual capacity due to the difference in capacity calculation. (E.g. For a 80GB HDD, Windows represents the capacity as 74.5GB, 80x1,000x1,000x1,000 byte/(1,024x1,024x1,024)byte = 74.505GB)
In addition, the capacity representation in Windows may be even smaller because some programs such as Recovery Solution may reside in a hidden area of the HDD.
About Memory Capacity Representation
The memory capacity reported in Windows is less than the actual capacity of memory. This is because BIOS or a video adapter uses a portion of memory or claims it for
further use. (E.g. For 1GB(=1,024MB) memory installed, Windows may report the capacity as
1,022MB or less)
5
Recovery Solution Representation (Optional)
Q. What is a Recovery Area?
A. - Samsung computers have an additional partition to recover computers or save
backup les. (Only for models with the Samsung Recovery Solution.) This partition is called a Recovery Area and it includes a recovery image that comprises of the OS and application programs.
- You can either double-click the Samsung Recovery Solution icon on the desktop
or press F4 while booting the computer to enter the Recovery Area. Then you
can back up the present computer state or recover the computer from backed up
images.
- For deleting the Recovery Area, you need to use an additional Recovery Area Removal Tool. After deleting the recovery area, you can use the newly created partition for other uses, such as for saving personal data. Be careful that once the
recovery area is deleted, the Samsung Recovery Solutions will not work anymore.
Q. The capacity representation of the hard disk drive(HDD) in Windows is
different from the product specications.
A. - The capacity of the storage device (HDD) of the manufacturer is calculated
assuming that 1KB=1,000 Bytes. However, the operating system (Windows) calculates the storage device capacity assuming that 1KB=1,024 Bytes, and therefore the capacity representation of the HDD in Windows is smaller than the actual capacity. This is due to the difference in capacity calculation and does not
mean the installed HDD is different from the product specications.
- The capacity representation in Windows may be smaller than the actual capacity because some programs occupy a certain area of the HDD outside of Windows.
- For models with Samsung Recovery Solution, the HDD capacity representation in Windows may be smaller than the actual capacity because Samsung Recovery Solution uses a hidden area of about 5~20GB of the HDD to save the recovery image, and that hidden area is not counted towards the total size available to Windows. The size of Samsung Recovery Solution varies by models because of the different size of applied programs.
6

Contents

Chapter 1. Getting Started
Product Features 2 Before You Start 3 Contents 7 Safety Precautions 8 Proper Posture During Computer Use 24 Important Safety Information 27 Replacement Parts and Accessories 30 Regulatory Compliance Statements 33 WEEE SYMBOL INFORMATION 48 Overview 50 Turning the Computer On and Off 56
Chapter 2. Using the Computer
Keyboard 60 Touchpad 63 External-type CD drive
(To be purchased) 69 Multi Card Slot (Optional) 71 Connecting a monitor / TV 74 Adjusting the Volume 83 Wired Network 88 Wireless Network (Optional) 92
Chapter 3. Settings and Upgrade
LCD Brightness Control 96 BIOS Setup 98 Setting a Boot Password 101 Changing the Boot Priority 104 Upgrading Memory 105 Battery 107 Using the Security Lock Port 113
Chapter 4. Troubleshooting
Using Samsung Recovery Solution 115 Reinstalling Windows 7 129 Reinstalling Windows XP 134 Questions and Answers 138
Chapter 5. Appendix
Product Specications 157 Glossary 159 Index 164
7

Safety Precautions

For your security and to prevent damage, please read the following safety instructions
carefully. Since these are commonly applied to Samsung Computers, some gures may differ
from the actual product.
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Installation Related
Do not install the product in places exposed to humidity such as bathrooms.
There is a danger of
electric shock. Use the
product within the operating
conditions specied in the
Manufacturers User Guide.
Keep the plastic bags out of the reach of children.
There is a danger of suffocation.
Keep a distance of 15cm or more between the computer and the wall and do not place any objects between them.
Failing to do so may cause an increase in the internal temperature of the computer and result in injury.
Do not install the computer on a slant or a place prone to vibrations, or avoid using the computer in that location for a long time.
Failing to do so may result
in an increased risk of
malfunctions or damage to the product.
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NB Ver 2.2
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Avoid exposing any part of your body to the heat from the computer vent or AC adapter for a long time when the computer is on.
Exposing a part of your body close to the heat from the vent or AC adapter for long periods of time may cause a burn.
Avoid blocking the vent at the bottom or side of the computer when using it on a bed or cushion.
If the vent is blocked,
there is a danger of damaging the computer or overheating the inside of the computer.
Power Related
The power plug and
wall outlet gures may
differ depending on the
country specications
and the product model.
Do not touch the main plug or power cord with wet hands.
There is a danger of
electric shock.
Do not exceed the standard capacity (voltage/current) of a multi-plug or power outlet extension when using it for the product.
This may result in electric
shock or re.
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Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
If the power cord or power outlet makes a noise, disconnect the power cord from the wall outlet and contact a service center.
This may result in electric
shock or re.
Do not use a damaged or loose main plug or power cord or power outlet.
This may result in electric
shock or re.
Plug the power cord
rmly into the power
outlet and AC adapter.
Failing to do so may result
in electric shock or re.
Do not unplug the power cord out by pulling the cable only.
If the cord is damaged, it
may result in electric shock or re.
Do not bend the power cord excessively or do not place a heavy object over the power cord. It is especially important to keep the power cord out of reach of infants and pets.
If the cord is damaged, it
may cause electric shock or re.
Connect the power cord to an outlet or multiple power plug (extended cable) with a ground terminal.
Failing to do so may result
in electric shock.
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
If any foreign substance such as water enters the power input jack, AC adapter or the computer, disconnect the power cord and contact the service center.
Damage to the device within the computer may
result in electric shock or re hazard.
AC Adapter Usage Precautions
Connect the power cord
to the AC adapter rmly.
Otherwise, there is a
danger of re due to an
incomplete contact.
Use only the AC adapter supplied with the product.
Using another adapter may
cause the screen to icker.
Do not place heavy objects or step onto the power cord or AC adapter to avoid damaging the power cord or AC adapter.
If the cord is damaged, there is a danger of electric
shock or re.
Keep the power cord or outlet clean so that they are not covered with dust.
Failing to do so may result
in re.
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Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Battery Usage Related
Authorized
Parts
Keep the battery out of the reach of infants and pets, as they could put the battery into their mouths.
There is a danger of electric
shock or choking.
Use an authorized battery and AC adapter only.
Please use an authorized battery and adapter approved by Samsung Electronics.
Unauthorized batteries and adapters may not meet the proper safety requirements and may cause problems or malfunctions and result in
an explosion or re.
Do not use the computer in a badly ventilated location such as on bedding, on a pillow or cushion, etc, and do not use it in a location
such as room with oor
heating as it may cause the computer to be oveerheated.
Take care that the
computer vents (on the side or the bottom) are not
blocked especially in these
environments. If the vents
are blocked, the computer
may overheat and it may cause a computer problem, or even an explosion.
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Power Off
Do not use the computer in a humid location such as a bathroom or sauna.
Please use the computer within the recommended temperature and humidity range (10~35ºC, 20~80% RH).
Do not close the LCD panel and put the computer into your bag to move it when it is still turned on.
If you put the computer into your bag without turning it off, the computer may overheat and there is a
danger of re. Shut the
computer down properly before moving it.
Never heat the battery or put the battery into a
re. Do not put or use the
battery in a hot location such as a sauna, inside a vehicle exposed to the heat, and so on.
There is a danger of an
explosion or re.
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Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Take care not to allow metal objects such as a key or clip to touch the battery terminal (metal parts).
If a metal object touches the battery terminals, it may cause excessive
current ow and it may
damage the battery, or
result in a re.
If liquid leaks out of the battery or there is a funny smell coming from the battery, remove the battery from the computer and contact a service center.
There is a danger of an
explosion or re.
To use the computer safely, replace a dead battery with a new, authorized battery.
Please charge the
battery fully before using the computer
for the rst time.
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Usage Related
Disconnect all cables connected to the computer before cleaning it. If you are cleaning a notebook computer, remove the battery.
There is a danger of electric
shock or damage to the
product.
Do not connect a phone line connected to a digital phone to the modem.
There is a danger of a
electric shock, re or
damage to the product.
Do not place any
container lled with water
or chemicals over or near the computer.
If water or chemicals enter the computer, this may
cause re or electric shock.
If the computer is broken or dropped, disconnect the power cord and contact a service center for a safety check.
Using a damaged computer
may result in electric shock or re.
Avoid leaving the computer exposed to direct sunlight when the computer is in a badly ventilated location such as inside a vehicle.
This may result in
overheating, re or being
stolen.
Do not use your notebook PC for long periods of time while a part of your body is making direct contact with it. The temperature of the product may increase during normal operation.
This may result in harming
or burning your skin.
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Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Upgrade Related
Never disassemble the power supply or AC adapter.
There is a danger of electric
shock.
When removing the RTC (Real Time Clock) battery, keep it out of the reach of children as they could touch and/or swallow it.
There is a danger of
choking. If a child has
swallowed it, contact a doctor immediately.
Use only authorized parts (multi-plug, battery and memory) and never disassemble parts.
This may result in damage to the product, electric
shock or re.
Shut down the computer and disconnect all cables before disassembling the computer. If there is a modem, disconnect the phone line. If you are disassembling a notebook computer, make sure to remove the battery.
Failing to do so, may cause
electric shock.
Warning
Failing to follow instructions marked with this symbol may cause personal injury and even fatality.
Custody and Movement Related
Follow the instructions for the relevant location (e.g. airplane, hospital, etc.) when using a wireless communication device (wireless LAN, Bluetooth, etc.).
When carrying the notebook computer with other items, such as the adapter, mouse, books etc, take care not to press anything against the notebook computer.
If a heavy object is pressed against the
notebook computer, a
white spot or stain may appear on the LCD.
Therefore, take care not to
apply any pressure to the
notebook.
In this case, place the
notebook computer in a
separate compartment away from the other objects.
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Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
Installation Related
Do not block the ports (holes), vents, etc. of the product and do not insert objects.
Damage to a component within the computer may
cause electric shock or re.
When using the computer with it lying on its side, place it so that the vents face upwards.
Failing to do so, may cause the internal temperature of the computer to rise and the computer to malfunction or halt.
Do not place a heavy object over the product.
This may cause a problem with the computer. In addition, the object may fall and cause injury, or damage the computer.
Battery Usage Related
Dispose of worn-out batteries properly.
There is a danger of
re or explosion.
The battery disposal
method may differ depending on your country and region. Dispose of the used battery in an appropriate way.
Do not throw or disassemble the battery and do not put it into water.
This may cause an injury,
re or explosion.
Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
Use only a battery authorized by Samsung Electronics.
Failing to do so may cause an explosion.
Avoid contact with metal objects such as car keys or clips when keeping or carrying a battery.
Contact with a metal may cause excessive current and a high temperature and may damage the
battery or cause a re.
Charge the battery according to the instructions in the manual.
Failing to do so, may cause
an explosion or re from
damage to the product.
Do not heat the battery or expose it to heat (e.g. inside a vehicle during the summer).
There is a danger of
explosion or re.
Usage Related
Do not place a candle, light cigar, etc. over or on the product.
There is a danger of re.
Use a wall outlet or multi-plug with a grounding part.
Failing to do so may result
in electric shock.
Make sure to have the product tested by a safety service engineer after repairing the product.
Authorized Samsung Repair Centers will carry
out safety checks after a
repair. Using a repaired product without testing it for safety may cause an
electric shock or re.
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Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
In case of lightning, immediately turn the system off, disconnect the power cord from the wall outlet and phone line from modem. Do not use a modem or phone.
There is a danger of electric
shock or re.
Do not use your computer and AC-Adapter on your lap or soft surfaces.
If the computer temperature increases, there is a danger of burning yourself.
Connect only permitted devices to the connectors or ports of the computer.
Failing to do so, may cause
electric shock and re.
Close the LCD panel only after checking if the notebook computer is turned off.
The temperature may rise and it may cause overheating and deformation of the product.
Do not press the Eject Button while the Floppy Disk/CD-ROM drive is in operation.
You might lose data and
the disk might be suddenly
ejected and could cause an injury.
Take care not to drop the product while using it.
This may cause personal injury or loss of data.
Do not touch the antenna with electricity facility such as the power outlet.
There is a danger of electric
shock.
When handling computer parts, follow the instructions on the manual supplied with the parts.
Failing to do so, may cause damage to the product.
If the computer emits smoke, or there is a burning smell, disconnect the power plug from the wall outlet and contact a service center. If your computer is a notebook computer, make sure to remove the battery.
There is a danger of re.
Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
Do not use a damaged or
modied CD/Floppy Disk.
There is a danger of damaging the product or personal injury.
Do not insert your ngers
into the PC Card Slot.
There is a danger of injury
or electric shock.
Use recommended computer cleansing solution when cleaning the product and only use the computer when it is completely dried.
Failing to do so may cause
electric shock or re.
Emergency disk eject method using paperclip should not be used while the disk is in motion. Make sure to use the emergency disk eject method only when the Optical Disk Drive is stopped.
There is a danger of injury.
Do not place your face close to the Optical Disk Drive tray when it is operating.
There is a danger of injury due to an abrupt ejection.
Check CDs for cracks and damage prior to use.
It may damage the disc and cause disorder of device and injury of user.
Upgrade Related
Take care when touching the product or parts.
The device may be damaged or you may be injured.
Take care not to throw or drop a computer part or device.
This may cause injury or damage to the product.
Make sure to close the computer cover before connecting the power after a reassembly.
There is a danger of
electric shock if your
body touches an internal part.
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Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
Use parts authorized by Samsung Electronics only.
Failing to do so, may
cause re or damage the
product.
Never disassemble or repair the product by yourself.
There is a danger of
electric shock or re.
To connect a device that is not manufactured or authorized by Samsung Electronics, enquire at your service center before connecting the device.
There is a danger of damaging the product.
Custody and Movement Related
When moving the product, turn the power off and separate all
connected cables rst.
The product might be damaged or users may trip over the cables.
For long periods of not using the notebook computer, discharge the battery and preserve as it is detached.
The battery will be preserved at its best condition.
Do not operate or watch the computer while driving a vehicle.
There is a danger of a
trafc accident. Please
concentrate on driving.
Caution
Failing to follow instructions marked with this symbol may cause slight injury or damage to the
product.
Cautions on Preventing Data Loss (Hard Disk Management)
Take care not to damage the data on a hard disk drive.
A hard disk drive is so sensitive to
external impact that an external impact may cause loss of data on the surface
of the disk.
Take extra care, because moving the
computer or an impact on the computer when it is turned on may damage the
data of the hard disk drive.
The company is not liable for any loss
of any data caused by a customer’s careless usage or bad environmental conditions.
Causes that may damage the data of a hard disk drive and the hard disk drive itself.
The data may be lost when an external
impact is applied to the disk while
disassembling or assembling the computer.
The data may be lost when the
computer is turned off or reset by a
power failure while the hard disk drive is
operating.
The data may be lost and irrecoverable
due to a computer virus infection.
The data may be lost if the power is
turned off while running a program.
Moving or causing an impact to the
computer while the hard disk drive is operating, may cause les to be
corrupted or bad sectors on the hard
disk.
To prevent data loss due to damage to the hard disk drive, please backup your data frequently.
23

Proper Posture During Computer Use

Maintaining a proper posture during computer use is very important to prevent physical harm.
The following instructions are about maintaining a proper posture during computer use developed through human engineering. Please read and follow them carefully when using the computer.
Otherwise, the probability of (RSI: Repetitive Strain Injury) from repeated operations may increase and serious physical harm may be caused.
The instructions in this manual have been prepared so that they can be applied within the coverage of general users.
If the user is not included in the coverage, the recommendation is to be applied according to the user’s needs.
Proper Posture
Adjust the heights of desks and chairs appropriate to your height.
The heights are to be adjusted so that your arm forms a right angle when you
place your hand over the keyboard while
sitting down on a chair. Adjust the height of chair so that your heel
is comfortably placed on the oor.
Do not use the computer while you
are lying down, but only while you are sitting down.
Do not use the computer on your lap.
If the computer temperature increases, there is a danger of burning yourself.
Work while keeping your back straight. Use a chair with a comfortable back.
Keep the center of your leg weight not
on the chair but on your feet when you are sitting on a chair.
To use the computer while talking over
the telephone, use a headset. Using the computer with the phone on your shoulder is bad for posture.
Keep frequently used items within a
comfortable work range (where you
can reach them with your hands).
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Eye Position
Hand Position
Keep the monitor or LCD away from your eyes by at least 50cm.
50cm
Adjust the height of the monitor and
the LCD screen so that its top height is equal to or lower than your eyes.
Avoid setting the monitor and LCD
excessively bright.
Keep the monitor and LCD screen
clean.
If you wear glasses, clean them before
using the computer.
When entering contents printed on a
paper into the computer, use a static paper holder so that the height of the paper is almost equal to that of the monitor.
Keep your arm at a right angle as
shown by the gure.
Keep the line from your elbow to your
hand straight.
Do not place your palm over the
keyboard while typing.
Do not hold the mouse with excessive
force.
Do not press the keyboard, touchpad or
mouse with excessive force.
It is recommended connecting an
external keyboard and mouse when
using the computer for long periods of time.
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Volume Control (Headphones and Speakers)
Check your volume rst to listen to
music.
Check your
volume!!
Check if the volume is too loud before
using headphones.
Use Time (Break Time)
Take a break for 10 minutes or more
after a 50-minute period when working
for more than one hour.
Illumination
Do not use the computer in dark
locations. The illumination level for computer use must be as bright so for
reading a book.
Indirect illumination is recommended.
Use a curtain to prevent reection on
the LCD screen.
It is not recommended using
headphones for long periods of time.
Any deviation from the equalizer
default setting could cause hearing impairment.
The default setting can be changed
through software and driver updates
without your intervention. Please check the equalizer default setting before rst
usage.
Operation Condition
Do not use the computer in hot and
humid locations.
Use the computer within the allowed
temperature and humidity range
specied in the User Guide.
26

Important Safety Information

Safety Instructions
Your system is designed and tested to meet the latest standards for safety of information technology equipment. However, to ensure safe use of this product, it is important that the safety
instructions marked on the product and in
the documentation are followed.
Always follow these instructions to help guard against personal injury and damage to your system.
Setting Up your System
Read and follow all instructions
marked on the product and in the
documentation before you operate your system. Retain all safety and operating instructions for future use.
Do not use this product near water or a
heat source such as a radiator.
Set up the system on a stable work
surface.
Ensure that the electrical outlet you
are using to power your equipment is
easily accessible in case of re or short
circuit.
If your computer has a voltage selector
switch, make sure that the switch is in
the proper position for your area.
Openings in the computer case are
provided for ventilation. Do not block or cover these openings. Make sure
you provide adequate space, at least 6 inches (15 cm), around the system for
ventilation when you set up your work area. Never insert objects of any kind
into the computer ventilation openings.
Ensure that the fan vents on the bottom
of the casing are clear at all times. Do not place the computer on a soft
surface, doing so will block the bottom
vents.
If you use an extension cord with this
system, make sure that the total power
rating on the products plugged into the extension cord does not exceed the extension cord power rating.
The product should be operated only
with the type of power source indicated on the rating label.
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Care During Use
Do not walk on the power cord or allow anything to rest on it. Do not spill anything on the system. The best way to avoid spills is to not eat or drink
near your system.
Some products have a replaceable CMOS battery on the system board. There is a
danger of explosion if the CMOS battery is replaced incorrectly. Replace the battery with the same or equivalent type recommended by the manufacturer. Dispose of batteries according to the manufacturers instructions. If the CMOS battery
requires replacement insure that a qualied technician performs the task.
When the computer is turned off, a small amount of electrical current still ows
through the computer.
To avoid electrical shock, always unplug all power cables, remove the battery and
modem cables from the wall outlets before cleaning the system.
Unplug the system from the wall outlet and refer servicing to qualied personnel if:
– The power cord or plug is damaged. – Liquid has been spilled into the system. – The system does not operate properly when the operating instructions are followed. – The system was dropped or the casing is damaged. – The system performance changes.
The Instruction On Safety Operation of NotePC
z When installing and operating devices please refer to safety requirements in the
user guide.
x Devices can be used only with the equipment specied in the technical
specications of the devices.
If any smell of burning or smoke is detected from the computer the unit should
c
be switched off and battery removed. The unit should be checked by a qualied
technician before reuse.
v Service and repair of devices should be carried out by authorized service centers. b Do not allow your portable computer to operate with the base resting directly on
exposed skin for extended periods of time. The surface temperature of the base
will rise during normal operation (particularly when AC Power is present). Allowing
sustained contact with exposed skin can cause discomfort or eventually a burn.
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