Power Management - Acer TravelMate 540 Series User Manual

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Power management

This computer has a built-in power management unit that monitors
system activity. System activity refers to any activity involving one or
more of the following devices: keyboard, mouse, floppy drive, Hard
Disk, or any connected peripherals. If no activity is detected for a
period of time (called an inactivity timeout), the computer stops some
or all of these devices in order to conserve energy.
This computer employs a power management scheme that supports
ACPI (Advanced Configuration and Power Interface), which allows for
maximum power conservation and maximum performance at the same
time. Windows handles all power-saving chores for your computer.