Apple Power Macintosh 9600 - Manual (Page 130)

Problems turning on or starting up your computer
The computer is turned on but the screen is dark.
One of the following is probably the cause:
m You have a screen saver program that darkens the screen when the
computer has not been used for a certain period of time.
Press a key or move the mouse to turn off the screen saver.
m Your computer has gone to sleep due to inactivity. “Wake it up” by pressing
the Power key (marked with a π) on the keyboard.
m The monitor’s brightness control (¤) is not adjusted properly.
Check the monitor’s brightness control and turn it up if necessary.
m The monitor’s contrast control (O) is not adjusted properly.
Check the monitor’s contrast control and adjust it if necessary.
m The monitor is not getting power.
Check that the computer’s power cord is firmly connected and plugged into
a grounded electrical outlet, and that the outlet has power. If the computer
is plugged into a power strip, make sure the power strip is turned on.
Check that the monitor is plugged in and turned on, and that the monitor
cable is firmly connected to both the computer and the monitor.
The computer makes an unusual sound at startup.
m If you hear four tones, try starting up the computer from the system
software CD-ROM disc. For instructions, see “Starting Up From the
System Software CD-ROM Disc” in Chapter 11, “Diagnostic Techniques.”
If the hard disk icon appears after starting up from the system software CD,
you can probably repair it using the instructions in “Testing and Repairing
Your Hard Disk” in Chapter 11. If the computer does not start up, or if the
hard disk icon does not appear, the hard disk may need professional repair.
Contact an Apple-authorized service provider or call Apple for assistance.
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