The Monitor Is Dark After You Turn On The Computer; Flashing Question Mark On Start-Up - Power Computing PowerCenter PRO User Manual

If you cannot restart the computer from Mac OS, use the Reset button on
the front panel.
If the Reset button does not work, use the power button on the front panel
to turn off the computer. Wait at least ten seconds before turning it back
on. (You need to wait to give the hard disk time to spin down.)

The monitor is dark after you turn on the computer

Follow the suggestions under Problems starting up on page 11.

Flashing question mark on start-up

In order for your computer to start-up successfully, the computer must have a
valid System Folder to start from. A flashing question mark indicates that the
computer is unable to locate a valid system folder on the hard disk or any
other bootable device (i.e., a floppy disk, the CD-ROM, etc.). This is typically
caused by lack of a bootable device, a device interfering in the boot-up process,
or a corrupted System Folder.
1. VERIFY that all external SCSI devices such as hard drives and
scanners are turned on and properly configured as detailed in Using
Hard Disk Toolkit•PE to test and repair SCSI disks, starting on page 48.
One of the main causes of a flashing question mark is a misconfigured SCSI
chain.
2. REMOVE all external peripherals except the monitor, keyboard, and
mouse from the computer.
Examples of peripheral devices include removable-media drives, network
connections, scanners, and modems. One of these peripherals could be
interfering in the start-up process. Try booting the computer again with the
external devices disconnected. If it boots with no issues, try reconnecting
the external devices one-by-one until you find the interfering device. Verify
the device is configured correctly. If it is, contact the device's manufacturer
for assistance and configuration information.
For Technical Support, Call 1-800-708-6227
Troubleshooting
PowerCenter User's Guide
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