There's a monitor port on your machine that you can connect to. For directions on replacing the screen, please go here and identify your Book. There is a number on the back that looks like Axxx. Let us know which one you have and we can direct you: http://www.ifixit.com/Info/ID-your-Mac/216
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Here's how to remove the display: http://www.ifixit.com/Guide/Repair/Installing-PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Display/558/1
There's a monitor port on your machine that you can connect to. For directions on replacing the screen, please go here and identify your Book. There is a number on the back that looks like Axxx. Let us know which one you have and we can direct you: http://www.ifixit.com/Info/ID-your-Mac/216