Lenovo ThinkPad T470 20HD, Hardware Maintenance Manual, Page: 44 / 116

1. Turn on the computer.
2. When the logo screen comes up, immediately press F1 to enter the ThinkPad Setup program.
3. Select Security .
4. Select Password .
5. Select Hard disk x password , where x is the letter of the hard disk drive. A pop-up window opens.
6. Select Master hard disk password .
7. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
8. Press F10.
9. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the
master hard disk password have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep, and
hibernation.
Screen blank mode (for the Windows 7 operating system only)
If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off.
To put the computer into screen blank mode, do the following:
1. Right-click the battery status indicator on the taskbar.
2. Select Power off display .
To end screen blank mode and resume normal operation, press any key.
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 or solid-state drive is powered off.
• The microprocessor stops.
To put your computer into sleep mode, press Fn+4 or do the following:
• For Windows 7 : Click the arrow beside the Shut down icon, and then select Sleep . To return from sleep
mode, press the Fn key.
• For Windows 10: Open the Start menu, click Power , and then click Sleep .
To return to normal operation, press the Fn key only.
In certain circumstances, the computer goes into sleep mode automatically:
• After a period of inactivity specified in power plan settings
• When the battery power is low
Hibernation mode
In hibernation mode, the following occurs:
• The system status, random access memory (RAM), video random access memory (VRAM), and setup data
are stored on the hard disk drive or solid-state drive.
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T470 Hardware Maintenance Manual