Q: im trying to reset my ibook g4. when I hit command s all I get is a black screen. is there another way?

There are some references, over a period of time, for some vintage

hardware models of Apple computers covering older software and

the keyboard commands haven't changed all that much. Some are

more directed at later OS X versions, in recent reference sites...

•OS X Keyboard Shortcuts:

http://support.apple.com/kb/HT1343

•Magical Macintosh Keyboard Sequences: (2004)

http://davespicks.com/writing/programming/mackeys.html

•TUAW Tip: keyboard shortcuts during OS X Startup: (2006)

http://www.tuaw.com/2006/03/27/tuaw-tip-keyboard-shortcuts-during-mac-os-x-start up/

Why were you trying to start in Single user mode or Command-line?

Do you have the OS X system install-restore DVDs?

Good luck & happy computing!