Dell D825TM Servicehandleiding - Pagina 8

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1. Color Monitor

Customizing Your Monitor

Graphic Enhancement Mode

(GEM)

You can automatically change the characteristics of the picture

to match the way you use your monitor with the Graphic

Enhancement Mode (GEM). Simply press the

(GEM) button

to cycle through the three modes.

Turn on the monitor and computer.

Press the

(GEM) button to set the mode.

Each time you press the

(GEM) button, the mode changes

and appears on the screen as follows.

STANDARD MODE

PRESENTATION MODE

GRAPHICS/VIDEO MODE

The STANDARD MODE is ideal for spreadsheets, word

processing, and other text oriented applications.

The PRESENTATION MODE is useful for presentation

programs that require vivid colors.

The GRAPHICS/VIDEO MODE gives movies and games

enhanced visual appeal by increasing the sharpness and

brightness.

The selected mode indication appears on the screen for about

three seconds.

If the screen appears too white, adjust the color temperature

(see "Using the COLOR OSD" on page 7).

Note

The PRESENTATION MODE and GRAPHICS/VIDEO MODE may

produce ghost images when displaying text oriented applications.

These modes change the brightness of the picture dynamically

according to changes in moving pictures. If ghost images appear,

set the GEM to STANDARD MODE.

Additional Information

Warning Messages

If there is something wrong with the input signal, one of the following messages appears.

The input signal condition

"OUT OF SCAN RANGE" indicates that the input signal

is not supported by the monitor's specifications.

"NO INPUT SIGNAL" indicates that no signal is input.

The message disappears after about 30 seconds.

To solve these problems, see the "Troubleshooting" section

below.

Troubleshooting

This section may help you isolate the cause of a problem and as a result, eliminate the need to contact technical support.

Symptom

Check these items

No picture

If the u indicator is not lit

• Make sure the power cord is properly connected.

• Make sure the u (POWER) switch is in the "ON" position.

If the "NO INPUT SIGNAL"

• Try pressing any key on the computer keyboard.

message appears on the screen, or

• Make sure your computer is turned on.

if the u indicator is either orange

• Make sure the video signal cable is properly connected and all plugs are firmly seated in

or alternating between green and

their sockets.

orange

• Make sure none of the HD15 video input connector pins are bent or pushed in.

• Make sure the video board is completely seated in the proper bus slot.

If the "OUT OF SCAN RANGE"

• Make sure the video frequency range is within that specified for the monitor.

message appears on the screen

Horizontal: 30 – 70 kHz

Vertical: 50 – 120 Hz

Refer to your computer system's instruction manual to adjust the video frequency range.

• If you are using a video signal cable adapter, make sure it is the correct type.

If no message is displayed and

• Run the SELF TEST function:

the u indicator is green or

1. Turn off the monitor and disconnect the video cable from the computer.

flashing orange

2. Turn on the monitor and wait five seconds. The "NO INPUT SIGNAL" message

should appear with a color bar pattern. The message and pattern are

displayed for 30 seconds.

If the monitor displays White, Red, Green and Blue colors, the monitor is

functioning properly.

• Make sure none of the HD15 video input connector pins are bent or pushed in.

Picture is scrambled

• Check your video board manual for the proper monitor setting.

• Check this manual and make sure the monitor supports the graphics mode and the

frequency at which you are trying to operate. Even if the frequency is within the proper

range, some video boards may have a sync pulse that is too narrow for the monitor to

sync correctly.

Color is not uniform

• Degauss the monitor (page 8).

If you place equipment which generates a magnetic field, such as a loudspeaker, near the

monitor, or you change the direction of the monitor, the color may not be uniform.

The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field

for uniform color reproduction. If a second degauss cycle is needed, allow a minimum

interval of 20 minutes for the best result.

INFORMATION

Input signal condition

OUT OF SCAN RANGE