Ok,I am using compaq Presario v3000(V3111tu) which I have upgrade it's ram from 512 mb to be 2 Gb.
I use Mac OS x 10.5.7 . I can do every on it till finish installing But when I reboot the system (When there is DVD in its drive)It ask me to restart the system.But when I did so.The still was the same.

So I Put out the DVD for its drive and try to restart.This time there,It display blue screen only a blue-screen.It can't display anything.But there still some kinda music comes with that blue screen from it and I just can't stop that music and it was so loud.

So if you guys have any way to help me please reply me.
Or please give an installation guide for this model.
P.S. Sorry for my poor english.