Power Computing PowerCenter PRO User Manual page 191

Problem/Question
The computer does not
boot up (question mark
icon displays).
Chapter 5: Compatibility Notes & Troubleshooting
Table 1. Troubleshooting
Potential Cause
Your hard disk may have been incorrectly
terminated.
Software may have damaged your
computer's battery backed up parameter
RAM (PRAM).
The Desktop file may be corrupt.
You may need to replace your device
driver software.
The hard disk's System Folder or the SCSI
or IDE drivers may have been corrupted
by a system crash or virus.
The directory on your hard disk may be
damaged.
System or driver is corrupted.
Solution
Check your cabling. For advice on solving SCSI problems, see
the table entry "Hard Disk ToolKit•PE does not recognize a
device on the SCSI bus after bus rescan."
To reset PRAM on Macintosh IIx and newer computers, hold
down the Command, Option, P, and R keys while booting.
Apple's recommended practice is to let the system boot three
times while holding these keys.
If you're using an add-on video board, you might have to hold
down the Spacebar on a subsequent restart to reset the
monitor.
To rebuild the invisible Desktop file, hold down the Command
(Apple) and Option keys while the computer is starting up; a
dialog will inform you that rebuilding is in process.
This does not damage your data, but does remove any file
comments.
Take these steps:
1. Back up your data.
2. Insert a Macintosh startup disk or CD into your computer's
floppy or CD-ROM drive, turn on your hard disk, then
turn on your computer.
3. To update the drivers, run HDT• PE and use the "Update
Driver" option. The System/Finder files may have been
corrupted or lost and may need to be replaced.
4. If a dialog comes up asking you if you wish to initialize it,
use a recovery program to recover or repair the drive.
Replace the Mac OS on the hard disk first by starting up
initially off a floppy disk or CD and reinstalling using the
Installer. If the problem persists, use HDT• PE to update the
drivers on the hard disk.
Apple's Disk First Aid program can repair some bad
directories. If the directory is unsalvageable, you can recover
the data on the drive with a recovery utility or restore the
data from previous backups.
Hold down Command-Option-Shift-Delete to prevent the Mac
from booting off of a hard disk, so that it can boot off of a
floppy or CD-ROM.
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