PowerBook G4 cannot boot up and doesn't install any versions
Actually we need a little more info.

When you turn it on do you get the Mac startup "bong?"

Does the screen light up? What color is it (black, gray, etc?)

Does anything appear on the screen? EG an Apple logo, flashing question mark, drive icon with a slash through it, etc...

If it is asking for a password there is a utility on the install DVD that can reset the password. You can also reset the password by (if memory serves me...) by just removing one of the DIMMs, turning it on. Turn it back off and put the DIMM back in.