Issue: Powerbook Pismo with replaced optical drive (see below for type) will not boot off of any CD, including brand new DiskWarrior for X, OS X, Yellow Dog Linux, etc.
Attempted: Put in CD and held down C. Booted to OS X and not CD. Then put in Disk Warrior CD, failed. OS X CD, failed. Put in CD, held down Option with desire to click on CD manually. The CD did not show up. Took apart optical drive and cleaned, reseated and replaced back into caddy.
Oddities: Burning CDs in iTunes, playing CD based games and mounting of CDs is not giving any problem at all.
Tried: Zapping P-Ram 5 times, resetting OF (neither worked for CD boot). Tried some OF commands to force CD boot (like boot-cd), response of "no cd" or some such.
Fear: Motherboard issue.
Desire: Powerbook G5
Until then: Hope someone here can offer ideas to get it working.