Apple Power Macintosh 4400 - Manual (Page 16)

Problems starting up?
If the screen is dark, check these items to see if you can identify the problem:
m Is the computer turned on? The power-on light on the front of the
computer should be on. If it isn’t, press the power button on the front of
the computer.
m Is the power cord connected to the computer, and is the cord plugged into a
power source?
m If the computer is plugged into a power strip, is the power strip turned on?
m Are the keyboard and mouse cables connected correctly? (Don’t disconnect
the keyboard or mouse cable while the computer is on. You could damage
your equipment.)
m Is the monitor power cord plugged in?
m Is the monitor cable attached firmly to both the monitor and computer?
m Is the monitor turned on? (Check the power-on light on the front of
the monitor.)
m Is the brightness and contrast control on the monitor adjusted correctly?
(On most monitors, the control is marked with the ¸ icon.)
m If you have an external hard disk attached to your computer, is that hard
disk turned on? Was it turned on before you turned on the computer? If
you’re not sure, turn everything off. Then turn on the external hard disk
before you turn on the computer.
If you see a blinking question mark on the screen, you probably need to read
“Solutions to Common Problems” in Chapter 6.
16 Chapter 1