Lenovo B580 Laptop Hardware Maintenance Manual - Lenovo B580 - Page 40

Passwords, Power-on password, Supervisor password, Power management, Screen blank mode, Sleep mode

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For more information about the recovery solutions provided on your computer, refer to the help information system of the Windows 8 operating system. Passwords As many as two passwords might be needed for a Lenovo notebook computer: the power-on password and the supervisor password. If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the computer is turned on. The computer does not start until the password is entered. Note: If only a supervisor password is set, the password prompt will not be displayed when the operating system is started. Power-on password A power-on password (POP) protects the system from being powered on by an unauthorized person. The password must be entered before an operating system can be booted. Supervisor password A supervisor password (SVP) protects the system information stored in the BIOS. The user must enter the SVP in order to get access to the BIOS and change the system configuration. Attention: If the SVP has been forgotten and cannot be made available to the service technician, there is no service procedure to reset the password. The system board must be replaced for a scheduled fee. Power management Note: Power management modes are not supported for APM operating system. To reduce power consumption, the computer has three power management modes: screen blank, sleep, and hibernation. Screen blank mode In the following circumstances, the computer goes into screen blank mode: • The time set on the "Turn off monitor" timer on the Windows 7 operating system expires. To end screen blank mode and resume normal operation, press any key. • You have pressed Fn+F2. To end screen blank mode and resume normal operation, press Fn+F2. Sleep mode When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank mode: • The LCD is powered off. • The hard disk drive is powered off. • The CPU stops. To enter sleep mode, press Fn+F1. In certain circumstances, the computer goes into sleep mode automatically: 34 Hardware Maintenance Manual

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For more information about the recovery solutions provided on your computer, refer to the help information
system of the Windows 8 operating system.
Passwords
As many as two passwords might be needed for a Lenovo notebook computer: the power-on password
and the supervisor password.
If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the
computer is turned on. The computer does not start until the password is entered.
Note:
If only a supervisor password is set, the password prompt will not be displayed when the operating
system is started.
Power-on password
A power-on password (POP) protects the system from being powered on by an unauthorized person. The
password must be entered before an operating system can be booted.
Supervisor password
A supervisor password (SVP) protects the system information stored in the BIOS. The user must enter the
SVP in order to get access to the BIOS and change the system configuration.
Attention:
If the SVP has been forgotten and cannot be made available to the service technician, there is no
service procedure to reset the password. The system board must be replaced for a scheduled fee.
Power management
Note:
Power management modes are not supported for APM operating system.
To reduce power consumption, the computer has three power management modes: screen blank, sleep,
and hibernation.
Screen blank mode
In the following circumstances, the computer goes into screen blank mode:
•
The time set on the “Turn off monitor” timer on the Windows 7 operating system expires.
To end screen blank mode and resume normal operation, press any key.
•
You have pressed Fn+F2.
To end screen blank mode and resume normal operation, press Fn+F2.
Sleep mode
When the computer enters sleep mode, the following events occur in addition to what occurs in screen
blank mode:
•
The LCD is powered off.
•
The hard disk drive is powered off.
•
The CPU stops.
To enter sleep mode, press Fn+F1.
In certain circumstances, the computer goes into sleep mode automatically:
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Hardware Maintenance Manual