NEC Multisync LCD1990FXP-BK User Manual download pdf (Page 31)

Troubleshooting

No picture

•

The signal cable should be completely connected to the display card/computer.

• The display card should be completely seated in its slot.

• Make sure the vacation switch is in ON position.

• Front Power Switch and computer power switch should be in the ON position.

•

Check to make sure that a supported mode has been selected on the display card or system being used.

(Consult display card or system manual to change graphics mode.)

• Check the monitor and your display card with respect to compatibility and recommended settings.

• Check the signal cable connector for bent or pushed-in pins.

• Check the signal input, “DVI-I”, or “D-Sub”.

• Check the DVI -SELECTION”DIGITAL “ or “ANALOG” in DVI-I input.

• If the front LED is dark green or blue, check the status of the IPM mode (see page 13).

Power Button does not respond

• Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor.

• Check the Vacation Switch on the back side of the monitor.

Image Persistence

•

Image persistence is when a residual or “ghost” image of a previous image remains visible on the screen.

Unlike CRT monitors, LCD monitorsʼ image persistence is not permanent, but constant images being displayed

for a long period of time should be avoided. To

alleviate image persistence, turn off the monitor for as long

as the previous image was displayed. For example, if an image was on the monitor for one hour and a

residual image remains, the monitor should be turned off for one hour to erase the image.

NOTE: As with all personal display devices, NEC DISPLAY SOLUTIONS recommends using a moving

screen saver at regular intervals whenever the screen is idle or turning off the monitor when not in use.

Message “OUT OF RANGE” is displayed (screen is either blank or shows rough images only)

• Image is displayed only roughly (pixels are missing) and OSM warning “OUT OF RANGE” is displayed: Either

signal clock or resolution is too high. Choose one of the supported modes.

• OSM warning “OUT OF RANGE” is displayed on a blank screen: Signal frequency is out of range. Choose

one of the supported modes.

Image is unstable, unfocused or swimming is apparent

• Signal cable should be completely attached to the computer.

• Use the OSM Image Adjust controls to focus and adjust display by

increasing or decreasing the ﬁne total. When the display mode is changed, the OSM Image Adjust

settings may need to be readjusted.

• Check the monitor and your display card with respect to compatibility

and recommended signal timings.

•

If your text is garbled, change the video mode to non-interlace and use 60Hz refresh rate.

LED on monitor is not lit (no green, blue, or amber color can be seen)

• Power Switch should be in the ON position and power cord should be connected.

Picture is not as bright

• Make sure the ECO MODE and AUTO BRIGHTNESS functions are turned off.

• If the brightness ﬂuctuates, make sure that the AUTO BRIGHTNESS function is turned off.

Display image is not sized properly

• Use the OSM Image Adjust controls to increase or decrease the Coarse total.

•

Check to make sure that a supported mode has been selected on the display card or system being used.

(Consult display card or system manual to change graphics mode.)

No Video

• If no video is present on the screen, turn the Power button off and on again.

• Make certain the computer is not in a power-saving mode (touch the keyboard or mouse)

Self Diagnosis

• The LCD display is equipped with the ability to self diagnose abnormalities. When the LCD detects a

problem, the LED on the front ﬂashes in a pattern of long and short blinks, depending on the type of

problem detected.

If the LED detects a problem, please refer service to qualiﬁed personnel.

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NEC Multisync LCD1990FXP-BK User Manual Page 31

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