One fact about PowerBooks that one may ignore only at one's peril is that they are PowerBooks. If an OS or System is installed as a clone or a copy of an installation on a desktop, the extra software needed by a PB will not have been installed by Installer, which installs what it believes the immediate target Mac needs. The same happens if you make an installation onto a PB from a desktop off which hangs the PowerBook in SCSI Disk or Target Disk mode. Both of the foregoing installation methods can be used if you afterwards add the missing software manually (using, say, TomeViewer).

Carefully check your installation, and look for the specific PB software in the Extensions Folder. The extensions manage system power use, sleep mode, HDD spindown, battery management, SCSI Disk Mode, video mirroring and so on. Do those names ring any bells for you in the light of your problem and its cure by using a drive from another PB?

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