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English-41
Troubleshooting
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The signal cable should be properly connected to the display
card/computer.
The display card should be properly seated in its slot.
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. (Please 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.
Power Button does not respond
Unplug the power cord of the monitor from the AC outlet to
turn off and reset the monitor.
Image persistence
Please be aware that LCD Technology may experience a
phenomena known as Image Persistence. Image Persistence
occurs when a residual or “ghost” image of a previous image
remains visible on the screen. Unlike CRT monitors, LCD
monitors’ 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 of America, Inc. recommends displaying moving
images and using a moving screen saver at regular intervals
whenever the screen is idle or turning off the monitor when
not in use.
Image is unstable, unfocused or
swimming is apparent
Signal cable should be properly attached to the LCD
monitor, computer, or other input device.
Use the OSD screen controls to focus and adjust display by
increasing or decreasing the clock phase total. When the
display mode is changed, the OSD 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-
interlaced and use 60Hz refresh rate.
Image of component signal is greenish
Check to see if the DVD/HD input connector is selected.
LED on monitor is not lit
(no green or red color can be seen)
Main Power Switch should be in the ON position and power
cord should be connected.
Make certain the computer is not in a power-saving mode
(touch the keyboard or mouse).
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Red LED on monitor is blinking
A certain failure might have occurred, please contact your
nearest authorized NEC DISPLAY SOLUTIONS service
facility.
Display image is not sized properly
Use the OSD screen controls to increase or decrease the
clock total.
Check to make sure that a supported mode has been selected
on the display card or system being used. (Please consult
display card or system manual to change graphics mode.)
Selected resolution is not displayed properly
Use OSD information to enter Information menu and
confirm that the appropriate resolution has been selected. If
not, select appropriate resolution.
“SCHEDULE SETTINGS” / "OFF TIMER” functions
not working properly
The “SCHEDULE SETTINGS” function will be disabled
when the “OFF TIMER” is set.
If the “OFF TIMER” function is enabled and the power
to the LCD monitor is turned off or if the power supply is
interrupted unexpectedly, then the OFF TIMER will be
reset.
No Sound
Check to see if speaker cable is properly connected.
Check to see if mute is activated.
Check to see if volume is set at minimum.
NOTE: It is possible to play audio from a source that is
different from the video source. When setting parental
controls for video, be aware that this content is not filtered.
RS-232C does not work
Make sure the monitor is not in “Eco Standby” mode.
(see page
30)
Remote Control does not work
Make sure the batteries are inserted properly.
Test the batteries for strength/life.
Make sure to point the remote directly at the sensor on the
monitor.
Check if the remote is in Remote ID mode.
The remote control may not function when in direct
sunlight or when there is strong illumination on the remote
sensor of the monitor.
Snowy Picture, Poor Sound in TV
Check antenna/cable connection. Use new cable if necessary.
Interference in TV
Check components for shielding. Move them away from the
monitor if necessary.
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Summary of Contents for LCD4020-BK-IT
Page 1: ...MultiSync LCD4020 LCD4620 User s Manual...
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