Lenovo IdeaPad U455 Manuale utente

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)

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.

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

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.





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.



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