Hello guys, just to explain the situation. I bought a Powermac G5 but I realized that it can't boot into OS. It shows only flashing question mark and finder logo. When I put CD into Mac and boot from CD there is Apple and circle rotating than after 30sec there is 'no entry' logo and circle is rotating forever. I suspected into HDD but when I changed it there was also the same problem. I don't know any solution more. Can you advice me?