Apple Macintosh PowerBook 1400 - Manual (Page 26)

Putting the computer to sleep
Sleep is a power conservation feature of Macintosh PowerBook computers,
reducing the amount of power the computer draws when it’s not being used.
When the computer is in sleep, it has a darkened screen and appears to be off.
A small green light flashes on the top of the display case when the computer
is in sleep. (Note: The computer must be on in order for you to put it to sleep.)
To put the computer to sleep, do this:
1 Press and hold the Power key for about two seconds.
A dialog box appears.
2 Click the Sleep button.
Other ways of putting your computer to sleep
m You can choose the Sleep command from the Special menu to put your
computer to sleep.
WARNING Once you put your computer to sleep, listen for the hard disk
to stop spinning before you move your Macintosh PowerBook. Moving
your Macintosh PowerBook with the hard disk spinning can damage
your computer.
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