I vaguely remember the 2400 will only boot from a CD-ROM drive with the Apple firmware, i.e., an Apple CD drive. That's why I hung on to mine. See if you can boot from a floppy or other drive and then read the CD drive. On Jan 28, 2008, at 8:18 PM, Noah Wood wrote: > I have an external SCSI cd-rom drive which the 2400 refuses to boot > from, I have the drive set to "0" and the terminator and everything. > I recently wiped the HD clean and want to install I was able to boot > from the disk tools floppy via the floppy drive, but no luck on the > CD-ROM. Any ideas? Ralph Mawyer, Jr. San Antonio, Texas PB2400c/G3-320/112MB/80MB HD/Yu-Plan Keyboard mac2400 http://www.sarofax.com/mac2400/index2.html Your PowerBook 2400 Reference Site