Apple PowerBook (Duo 270C) - Manual (Page 306)

Disk drives and disks
The computer won’t start up from its hard disk, or the
hard disk icon doesn’t appear on the desktop.
n
There may have been a temporary software problem. Shut
down the computer, wait at least 10 seconds, and then turn it
on again.
n
If the computer is in a Duo Dock, someone may have selected
the dock’s hard disk as the startup disk. You can change this
setting in the Startup Disk control panel.
n
There may be a problem with the system software on the hard
disk. Start up the computer with the
Disk Tools disk. If the
hard disk’s icon appears, reinstall system software as
described in Chapter 5. Disk repair programs can sometimes
fix problems of this kind.
n
The information on the disk drive may be damaged. Try using
a disk repair program to repair or recover the information. If
this doesn’t work, you’ll need to reinitialize the hard disk. See
Chapter 7.
n
There may be a mechanical problem with the disk drive. If
none of the above suggestions works, take the computer to an
Apple-authorized service provider.
The hard disk keeps stopping and starting again.
n
The hard disk may be going to sleep to conserve power. Open
the PowerBook control panel and move the Battery
Conservation slider toward Better Performance.
290 Quick Reference