Wondering if you experts can help. I have a Power Mac 7600 which I have not booted up in years. It also has a card for an external differential drive. I hear the fan and drives spinning but no chime. Any suggestions? I just want to get the data (and old emails) off the drives. The differential drive makes that complicated (not just a SCSI adapter). Whoever can guide me to fix can have the Mac for free (just pay shipping) when I get the data backed up or printed as a last resort.