i need help with my powermac g3 :/ it turns on and reads cd's (both mac os and linux) on a mac os cd, i can hold option and get to the startup menu. it comes up with the mac os cd icon, but after i press the arrow the screen goes black. for the linux cds, some code shows, i press enter and the screen goes black, but my monitor and the computer stays on. is there anything i can do???? i got the powermac without a hard drive and no installation disks