Lenovo B470e Lenovo B470e/B570e User Guide - Page 40

Troubleshooting, Display problems, A password problem

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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 Problem When I turn on the computer, nothing appears on the screen. Solution • If the screen is blank, make sure that: - The battery is installed correctly. - The ac power 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. My screen goes blank while the computer is on. Restore backed-up files to your Windows environment or the entire contents of your hard disk drive to the original factory contents using the OneKey Recovery system. If you still see only the cursor on the screen, have the computer serviced. • 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. • Press Fn+F2 to confirm whether the LCD screen has been turned off. A password problem Problem I forgot my password. Solution • 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 hard disk drive password, a Lenovo authorized servicer cannot reset your password or recover data from the hard disk drive. 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. 24 User Guide

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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
Problem
Solution
When I turn on the computer, nothing appears on the
screen.
•
If the screen is blank, make sure that:
–
The battery is installed correctly.
–
The ac power 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 drive to the original
factory contents using the OneKey Recovery system.
If you still see only the cursor on the screen, have the
computer serviced.
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.
•
Press Fn+F2 to confirm whether the LCD screen has
been turned off.
A password problem
Problem
Solution
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 hard disk drive password, a Lenovo
authorized servicer cannot reset your password or
recover data from the hard disk drive. 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.
24
User Guide