Apple Macintosh PowerBook 190 Series - Manual (Page 151)

Special key combinations
If difficulties with your trackpad or computer don’t allow you to use standard
methods of quitting a program or restarting your computer, you can try using
these special key combinations.
To do this... …press this key combination
Force a program to quit x -Option-Esc
Force the computer to restart x –Control–Power key
Here are other key combinations you may find useful.
To do this... …press this key combination
Start a “debugging” application used by software programmers* x –Power key
Rebuild desktop Shift key (while starting up)
release, then hold Option-
x
*If you do not have a debugging program installed, your screen displays a caret prompt (>). To return to the desktop,
type the letter “G.”
145 Using Your Keyboard