Power Management - Lenovo ThinkPad R51e Series Hardware Maintenance Manual

10. Select Yes in the Setup Configuration window.
Both user HDP and master HDP will have been
removed.

Power management

To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.
Screen blank mode
In R50e and R52 series, screen blank mode has three
variants, as follows:
1. If you press Fn+F3, or if the time set on the "LCD off
timer" in BIOS Setup Utility expires,
v The LCD backlight turns off.
v The hard disk drive motor stops.
v The speaker is muted.
2. If you are using the ACPI operating system and you
press Fn+F3,
v The LCD backlight turns off.
v The hard disk drive motor stops.
3. If the time set on the "Turn off monitor" timer in the
operating system expires,
v The LCD backlight turns off.
To end screen blank mode and resume normal operation,
press any key.
In R51e, press the Access IBM button and user the
ThinkVantage Productivity Center to turn off power to the
computer display.
Standby mode
When the computer enters standby mode, the following
events occur in addition to what occurs in screen blank
mode:
v The LCD is powered off.
v The hard disk drive is powered off.
v The CPU stops.
To enter standby mode, press Fn+F4.
In R51e, you can also use the ThinkVantage Productivity
Center to put the computer in standby mode.
Note: If you are using the ACPI operating system, you can
change the action of Fn+F4.
In certain circumstances, the computer goes into standby
mode automatically:
Related service information
General descriptions
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