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Solutions to common problems
The computer is turned on but the screen is dark.
The Macintosh or the monitor is not getting power, a program has darkened
the screen, or the monitor controls are not adjusted properly.
m If you use a screen saver program, press a key or move the mouse to turn
off the screen saver.
m Check the monitor’s brightness control and turn it up if necessary.
m Check that the monitor is turned on.
m Check that the power cord is plugged in and firmly connected to the
computer and that the electrical outlet has power. The power light on the
computer’s front panel should be on.
m If you have more than one monitor, and only one is dark, check that it is
set up correctly in the Monitors control panel.
If you are displaying video from your computer on television, it is normal for
your regular monitor to be darkened. See Chapter 8 of this book for more
information.
When you start up, a question mark icon appears in the middle of the screen and the
desktop doesn’t appear.
m Your computer may be having a problem recognizing a SCSI device. Turn
off external SCSI devices and restart.
If the computer starts up after you turn off your SCSI devices, read the
section on SCSI devices in Chapter 5 of this manual for information on
connecting SCSI devices and assigning SCSI ID numbers.
m The system software is not installed on the startup hard disk, the system
software is damaged, or the hard disk is not working properly.
Continue reading this section for more information.
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Chapter 9