Apple Power Macintosh 4400 - Manual (Page 15)

15 Getting Started
Problems turning on your computer?
If the screen is dark, check these items to see if you can identify
the problem:
m Is the computer plugged into a power source? If it is plugged into a
power strip, is the power strip turned on?
m Is the computer turned on? The power-on light in the power button
should be on. If it isn’t, press the power button (marked with the
symbol I) on the front of the computer.
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 turned on? (Check the power-on light on the front of
the monitor.)
m Is the monitor cable—the one connected to the monitor port (™) on
your computer—attached firmly to both the monitor and computer?
m Is the brightness control on the monitor adjusted correctly? (On most
monitors, the brightness control is marked with the symbol ¤.)
If you see a blinking question mark on the screen, turn to “Solutions to
Common Problems With Your Computer” in Chapter 9.