Apple Multiple Scan 720 Display - Manual (Page 32)

Problems with picture quality or placement
No colors appear on the screen, or the colors don’t look right.
m Check to make sure that the number of colors is set correctly in the Monitors & Sound
control panel or in the Control Strip. For more information, see Chapter 2 and the
documentation that came with your computer.
m If you have already changed the number of colors displayed on the screen, try one of
the following:
m Quit the application you’re running and start it again.
m Go back to the number of colors you were using previously.
The screen image is off-center.
m Try changing to another resolution using the Monitors & Sound control panel or the
Control Strip (see Chapter 2).
m Adjust the vertical or horizontal position. See “Adjusting the On-Screen Display
Controls” in Chapter 3. (Keep in mind that you may have to adjust the picture again
if you change resolutions.)
The screen image is too large or too small.
m Try changing to another resolution using the Monitors & Sound control panel or the
Control Strip (see Chapter 2).
m Adjust the horizontal or vertical size of the picture. See “Adjusting the On-Screen Display
Controls” in Chapter 3. (Keep in mind that you may have to adjust the picture again if you
change resolutions.)
The screen appears greenish, the screen image is unreadable, or there is
“snow” on the screen.
m Make sure the monitor cable is connected firmly to the correct port on the back of
the computer.
If you do not have a graphics card installed in your computer, the monitor cable should
be plugged into the monitor port on the back of your computer.
If you have a graphics card installed in your computer, the monitor cable should be
plugged into the port on the graphics card.
Problems with eyestrain
If you are having problems with eyestrain, adjust the screen contrast by turning the contrast
knob underneath the front of the monitor. In a bright room, contrast is usually best set at
maximum; in a dim room, lower contrast is usually more comfortable. Also, be sure to take
occasional breaks to focus your eyes on a distant object.
32 Chapter 4