Lenovo B450 Laptop User Guide

							Chapter 3. Using the Internet
27 „Using Wi-Fi (specific models only)
Enabling wireless connection
To enable wireless communications, do the following:
1Slide the integrated wireless device switch to  .
2Press Fn + F5 to make configuration.
Hardware connection
Software configuration
Consult your Internet Service Provider (ISP) and search Windows Help and 
Support Center for details on how to configure your computer.
Access point *
Wi - Fi
* Not supplied 
						

							28
Chapter 4. OneKey Rescue System
OneKey Rescue System  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
„Introduction 
The Lenovo OneKey Rescue System is an easy-to-use application that can 
be used to back up the data on your system partition (C drive) for easy 
restore when required. You can run Lenovo OneKey Recovery under the 
Windows operating system, and the OneKey Rescue System without 
starting the Windows operating system.
Attention:
In order to utilize the features of the OneKey Rescue System, your hard 
disk already includes a hidden partition by default to store the system 
image file and OneKey Rescue System program files. This default partition 
is hidden for security reasons and is the reason the available disk space is 
less than it claims. The exact available hard disk space depends on the file 
size of the mirror image file (based on the size of operating system and pre-
installed software).
 
						

							Chapter 4. OneKey Rescue System
29 „Using Lenovo OneKey Recovery (Within Windows operating 
system)
In Windows operating system, double click the OneKey Recovery System 
Icon on the desktop to launch Lenovo OneKey Recovery. 
Within the program, you can back up the system partition on the hard disk 
drive, other storage devices, or by creating recovery discs. 
For more instructions, see the help file of Lenovo OneKey 
Recovery.
Notes:
The backup process and creation of recovery discs may take some time, connect 
the AC adapter and battery pack to your computer.
After the recovery discs are burned, please number them so that you can use 
them in the correct order.
Computers without an integrated optical drive support the creation of recovery 
discs; however an appropriate external optical drive is needed to physically 
create the recovery discs. 
						

							30
Chapter 4. OneKey Rescue System
„Using Lenovo OneKey Rescue System (Without Windows 
operating system)
In the event that the operating system cannot be loaded, follow the steps 
below to access OneKey Rescue System.
 Shut down your computer.
 Press the   key to launch OneKey Rescue System.
Within the program, you can choose to restore your system partition to the 
original factory status, or to a previously generated backup. 
Note:The recovery process is irreversible. Make sure to back up any critical data 
before using the recovery feature. 
						

							31
Chapter 5. Troubleshooting
Frequently Asked Questions  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
This section lists frequently asked questions and tell where you can find detailed 
answers. For details about each publication included in the package with your 
computer, see Lenovo B450 Setup Poster. 
What safety precautions should I follow when using my computer?
See “Important safety information” on page iii of this guide.
How can I prevent problems with my computer?
See “Appendix B. Use and care information” on page 59 of this guide. 
More tips can be found in Chapter 1 and 2.
What are the main hardware features of my new computer?
More information can be found in Chapter 1 and 2.
Where can I find the detailed specifications for my computer?
See http://consumersupport.lenovo.com
.
I need to upgrade a device or I need to replace one of the following: the hard 
disk drive, memory, or the keyboard.
See “Appendix D. Customer replaceable units (CRUs)” on page 86 of this 
guide. 
						

							32
Chapter 5. Troubleshooting
Where are the recovery discs?
Your computer did not come with a recovery disc. For an explanation of 
the alternative recovery methods offered by Lenovo, see “Chapter 4. 
OneKey Rescue System” on page 28.
How can I contact the customer support center?
See “Appendix A. Getting help and service” on page 54 of this guide. 
Where can I find warranty information?
For the warranty applicable to your computer, including the warranty 
period and type of warranty service, see “Appendix C. Lenovo limited 
warranty” on page 72.
How can I install the device drivers?
A compatible device driver is a requirement to ensure correct operation 
and performance of each component in your computer. If your computer 
is pre-installed with an operating system, Lenovo provides all the 
drivers you need in your hard disk. 
						

							Chapter 5. Troubleshooting
33
What can I do if the backup process fails?
If you can start the backup feature without a problem, but it fails during 
the backup process, please try the following steps:
1Close other applications, then restart the backup process.
2Check if the destination media is damaged, try to select another path
and then try again.
When do I need to restore the system to the factory status?
You can use this feature when your system fails or you need to re-install 
your operating system. This will restore your computer back to the initial 
status when you first booted up your computer after receiving it from 
the store. If there is critical data on your current partition, back it up 
before you run this recovery feature. 
						

							34
Chapter 5. Troubleshooting
Troubleshooting  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
If you do not find your problem here, see Chapter 2. The following section only 
describes problems that might negate the need to refer to the more 
comprehensive information in Chapter 2.
Display problems
When I turn on the compu-
ter, nothing appears on the 
screen.If the screen is blank, make sure that:
- The battery is installed correctly. 
- The AC adapter is connected to the computer and 
the power cord is plugged into a working electrical 
outlet.
- The computer power is on. (Press the power 
button again for confirmation.)
- The memory is installed correctly. 
If these items are properly set, and the screen 
remains blank, have the computer serviced. 
When I turn on the 
computer, only a white 
cursor appears on a blank 
screen. Restore backed-up files to your Windows 
environment or the entire contents of your hard disk 
to the original factory contents using OneKey 
Recovery. If you still see only the cursor on the 
screen, have the computer serviced. 
						

							Chapter 5. Troubleshooting
35
My screen goes blank while 
the computer is on.Your screen saver or power management may be 
enabled. Do one of the following to exit from the 
screen saver or to resume from sleep or hibernation 
mode:
- Touch the touchpad.
- Press any key on the keyboard.
- Press the power button.
A Password problem
I forgot my password.If you forget your user password, you must take 
your computer to a Lenovo authorized servicer or a 
marketing representative to have the password 
changed. 
If you forget your HDD password, a Lenovo 
authorized servicer cannot reset your password or 
recover data from the hard disk. You must take your 
computer to a Lenovo authorized servicer or a 
marketing representative to have the hard disk drive 
replaced. Proof of purchase is required, and a fee will 
be charged for parts and service. 
If you forget your supervisor password, a Lenovo 
authorized servicer cannot reset your password. You 
must take your computer to a Lenovo authorized 
servicer or a marketing representative to have the 
system board replaced. Proof of purchase is 
required, and a fee will be charged for parts and 
service. 
						

							36
Chapter 5. Troubleshooting
Keyboard problems
A number appears when 
you enter a letter.The numeric lock function is on. To disable it, press 
Fn + Insert.
Sleep or hibernation problems
The computer enters sleep 
mode unexpectedly.If the processor overheats, the computer automatically 
enters sleep mode to allow the computer to cool and to 
protect the processor and other internal components. 
Check the settings for sleep mode.
The computer enters sleep 
mode immediately after 
Power-on self-test (POST). Make sure that: 
- The battery is charged.
- The operating temperature is within the acceptable 
range. See “Appendix B. Use and care 
information” on page 59.
Note:If the battery is charged and the temperature is within range, have the computer 
serviced.
The critical low-battery error 
message appears, and the 
computer immediately turns 
off.The battery power is getting low. Connect the AC 
adapter to the computer, or replace the battery with 
a fully charged one.