Apple Macintosh PowerBook 150 - Manual (Page 25)

Restarting your computer when it’s already on
You need to restart your computer—turn it off and back on again
immediately—when you want to make certain changes to your control panels,
use a newly installed system software file, or start up the computer from a
different disk.
To restart your computer:
m Choose Restart from the Special menu.
When you choose Restart, the computer prompts you to save your work,
closes all open programs, and restarts itself.
Choosing Restart does not affect any RAM disk you created or its contents.
If you can’t choose Restart
You may occasionally see a “system error” message on the screen (indicating
a temporary software problem). If this happens, you need to restart the
computer. In most cases, the error message is accompanied by a Restart
button. Use the trackball to click the Restart button.
For additional suggestions if you can’t restart using either of these methods,
see Chapter 9, “Troubleshooting.”
15 Setting Up Your PowerBook