Lenovo IdeaPad U455 User manual

New World. New Thinking.TM
www.lenovo.com
©Lenovo China 2009
P/N: 147003082
Printed in China
U455 User Guide V1.0 cover_1-4
Lenovo
IdeaPad U455
User Guide V1.0

First Edition (December 2009)
© Copyright Lenovo 2009.
U455 User Guide V1.0 cover_2-3
If your product is not working correctly,
DO NOT RETURN IT TO THE STORE.
For technical assistance, contact a Lenovo support
specialist 24 hours a day by calling toll free 1-877-4
LENOVO (1-877-453-6686).
Additionally, you can find support information and updates
on the Lenovo Web site located at
http://consumersupport.lenovo.com.
* Only for the users from the United States.
LENOVO products, data, computer software, and services have been developed exclusively at private expense
and are sold to governmental entities as commercial items as defined by 48 C.F.R. 2.101 with limited and
restricted rights to use, reproduction and disclosure. LIMITED AND RESTRICTED RIGHTS NOTICE: If
products, data, computer software, or services are delivered pursuant a General Services Administration “GSA”
contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
•Before using this information and the product it supports, be sure to read Important safety
information on page iii and Notices in Appendix E first.
•Some instructions in this guide may assume that you are using Windows® 7. If you are using
other Windows operating system, some operations may be slightly different. If you are using
other operating systems, some operations may not apply to you, and thus shouldn't affect your
use of this computer.
•The features described in this guide are common to most models. Some features may not be
available on your computer and/or your computer may include features that are not described in
this user guide.
Notes

Dear user,
Thank you for purchasing your new Lenovo notebook computer! Before
using this product, make sure to read this user guide carefully.
We are pleased that you have chosen Lenovo for your mobile computing
needs. To help you master the usage of your new computer quickly, we
have prepared this user guide. In this manual you will find information on
the system configuration, basic operating instructions, and important
notices. We have done our best to avoid any errors in making sure that the
information provided in this manual is accurate and reliable. However, due
to the short length of the user guide it is impossible to cover all topics in
great depth. For this reason, we apologize for any omissions you might
find.
Lenovo is always trying to improve the performance and reliability of its
products. For that reason, the hardware and software components shown
within the user guide might not perfectly match those of your system.
However, any inconsistencies between what is described in the user guide
and the operations of your computer should not substantially affect your
use.
Thanks for your cooperation!

Explanation of hard disk capacity
Dear user,
While using your computer, you may find that the nominal hard disk
capacity indicated is somewhat different from the disk capacity
displayed by the operating system. For example, a nominal 80GB hard
disk will appear as less than 80GB in the operating system. This
discrepancy is not an error in hard disk installation nor any other
problem, but a normal phenomenon of computers. This phenomenon is
primarily due to the following reasons:
I. Different standards used by the manufacturer and operating
system when calculating hard disk capacity
Hard disk manufacturers use a radix of 1000, i.e., 1G = 1,000MB, 1MB =
1,000KB, 1KB = 1,000 bytes. However, when identifying hard disk capacity,
operating systems use a radix of 1024, i.e., 1GB = 1,024MB, 1MB = 1,024KB,
1KB = 1,024 bytes. The standard adopted by your computer is that of the
hard disk manufacturers. Since the standards adopted by the hard disk
manufacturer and operating system are different, the hard disk capacity
displayed by the operating system will be different from the nominal hard
disk capacity.
For example, if the hard disk is nominally X G, even when it is completely
empty, the capacity displayed by the operating system will be:
X × 1000 × 1000 × 1000/ (1024 × 1024 × 1024) ≈X × 0.931 G

In addition, if a portion of the hard disk space has been used for some
specific purpose, then the capacity indicated by the operating system will
be even less than X × 0.931 G.
II. A portion of the hard disk space is used for specific purposes
Lenovo computers may come with preinstalled OneKey Rescue system, so
the hard disk has a special portion partitioned before delivery, which is
used to store hard disk mirror and OneKey Rescue system program files.
The size of the reserved space for this partition varies according to the
model, operating system and software of the computer. For the sake of
safety, this partition is not apparent, which is commonly referred to as a
“hidden partition”.
In addition, after the hard disk is partitioned or formatted, the system will
assign a certain amount of hard disk space for the system files.
For the above reasons, the available hard disk space indicated by the
operating system is always less than the computer’s nominal hard disk
capacity.

i
Important safety information...... iii
Important safety information ....iii
Chapter 1. Getting to know your
computer ....................................... 1
Top view........................................1
Left-side view ...............................4
Right-side view.............................5
Bottom view..................................6
Chapter 2. Learning the basics ... 8
First use..........................................8
Using AC adapter and
battery..........................................11
Using the touchpad....................14
Using the keyboard....................17
Connecting external devices.....20
Switching GPU (Select models
only) .............................................23
Special keys and buttons...........25
System status indicators............27
Securing your computer............28
Chapter 3. Using the Internet .... 31
Wired connection .......................31
Wireless connection ...................33
Chapter 4. OneKey Rescue
system..........................................39
OneKey Rescue system .............39
Chapter 5. Troubleshooting .......42
Frequently Asked Questions ....42
Troubleshooting .........................45
Chapter 6. Upgrading and
replacing devices ........................53
Replacing the battery.................53
Replacing the hard disk
drive .............................................55
Replacing memory .....................59
Appendix A. Getting help and
service..........................................64
Getting help on the Web ...........65
Calling the customer support
center............................................65
Getting help around the
world............................................68
Lenovo warranty service
telephone numbers.....................68
Contents

ii
Contents
Appendix B. Use and care
information.................................. 69
Caring for your computer ........ 69
Accessibility and comfort ......... 75
Maintenance ............................... 77
Appendix C. Lenovo limited
warranty ...................................... 82
Warranty information ............... 92
Appendix D. Customer replaceable
units (CRUs)................................ 96
Appendix E. Notices................... 98
Notices......................................... 98
ENERGY STAR model
information ............................... 101
Wireless related
information ............................... 103
Electronic emissions
notices........................................ 107
WEEE and recycling
statements ................................. 114
Turkish statement of
compliance................................ 114
EU WEEE statements .............. 115
Japan recycling statements..... 116
Notice for users in the
U.S.A.......................................... 118
Notice on deleting data from your
hard disk ................................... 118
Appendix F. Features and
Specifications........................... 120
Trademarks............................... 122
Index.......................................... 123

iii
Important safety information
Important safety information -----------------------------------------
This information can help you safely use your notebook personal
computer. Follow and retain all information included with your computer.
The information in this document does not alter the terms of your purchase
agreement or the Lenovo Limited Warranty. For more information, see
“Appendix C. Lenovo limited warranty” on page 82.
Read this first
Personal computers are electronic devices. Power cords, power adapters,
and other features can create potential safety risks that can result in
physical injury or property damage, especially if misused.
The safety risks are categorized as follows:
Danger:
Physical injury or even death may be caused.
Attention:
Property damage or even minor injury may be caused.
To protect yourself from hazards and create a safer computer work
environment, follow the instructions hereafter.



iv
Important safety information
Unpack
Inspect the covers of the computer and the AC adapter, especially
parts with the following labels attached for any crack or damage.
Danger:
• Hazardous voltage, current, and energy levels are present
inside any component that has this label attached.
