I bought a secondhand Ibook G3 without Ram and HDD.

Therefore i bought new Ram and hard drive for my Ibook.

I try to install Mac OS 10. for my Ibook but mine didn't boot at all.

The screen display grey with the finder and the question mark. (nothing happen even the CDRom still running)

i don't know what this i press but sometime it appear a arrow and a refresh but when i click on them nothing happen.

I did try to reset PRAM and make chime but nothing happen.

What wrong with my Ibook?