Hi all, first post on here begging for help! I have a G5 tower, PPC, and after opening it up to see if an old soundcard would fit the slots, I closed up and - nothing. My mac is whirring, fan activating as normal etc, but I'm getting nothing at all on screen, not even the dreaded question mark. I've tried booting from restore discs, which works fine until I specify which disc to restore/install, where the installation program doesn't even see my HD as a location. Any ideas? Logic board fried? Thanks in advance!