I am trying to re-install the system software on a PowerBook 2400c. I just purchased an external SCSI CD-ROM drive off eBay for this purpose. I have a connection cable and a terminator on the other SCSI port. Every time I try to boot holding down the "C" key it comes up in SCSI disk mode with a "2" flashing across the screen. How do I get it to boot off the CD-ROM? I have an OS 8.1 system software disk I am using, I just can't get it to boot off the CD-ROM. Much help would be appreciated. Thanks!