Apple Macintosh PowerBook 1400 - Manual (Page 28)

Automatic sleep
If you don’t use the computer for several minutes, it goes to sleep
automatically. This conserves battery power.
To wake the computer, press any key on the keyboard (except Caps Lock or
the trackpad button). The screen reappears as it was before the computer
went to sleep.
Note: If the display is partly or fully closed, open it about halfway (to an
angle of 45 degrees) and press a key to wake the computer.
You can control the automatic sleep feature. For more information on sleep
and automatic sleep, see the “Batteries & Power” topic of Mac OS Guide,
available in the Guide (h) menu.
Restarting a computer that’s already on
You need to restart your computer—turn it off and back on again—when you
want to make certain changes to settings, use a newly installed system
software file, or start up the computer using a different disk.
You may also need to restart if you see a “system error” message on the
screen (indicating a temporary software problem). In this case, use the
trackpad to click the Restart button that appears.
Follow these instructions to restart your computer:
1 Press and hold the Power key for about two seconds.
A dialog box appears.
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