I?ve just come into possession of both of these units. The Mac has a 20MB internal HD and doesn?t startup. There is no happy mac or boot chime. The video is just a single line in the middle of the screen. The HDD spins up and wants to be formatted by any Mac I?ve got that has USB on it. If anyone wants either of these let me know (San Diego area of California). If I hear nothing both will go to the electronic recycler next Saturday. David