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Troubleshooting - NEC MultiSync X461UN User Manual

Nec electronics america flat panel television user's manual
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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.
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
phenomenon 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 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 completely attached to the
computer.
Use the OSD Image Adjust controls to focus and adjust
display by increasing or decreasing the fine adjustment.
When the display mode is changed, the OSD Image
Adjust settings may need to be re-adjusted.
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.
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)
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).
Either light vertical or horizontal stripes may appear, depending on the specific display pattern. This is no product fault or
degradation.
RED LED on monitor is blinking
A certain failure might have occurred, please contact
your nearest authorized NEC DISPLAY SOLUTIONS
service facility.
If the monitor is powered off by the inside temperature
being higher than the normal operating temperature, a
RED LED will blink six times. Power on the display again
after confirming the inside temperature has been
reduced to normal operation temperature.
Display image is not sized properly
Use the OSD Image Adjust controls to increase or
decrease the coarse adjustment.
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 Display Mode to enter Information menu and
confirm that the appropriate resolution has been
selected. If not, select corresponding option.
No Sound
Check to see if audio cable is properly connected.
Check to see if mute is activated.
Check to see if volume is set at minimum.
Remote Control is not available
Check the Remote Control's batteries status.
Check if batteries are inserted correctly.
Check if the Remote Control is pointing at the monitor's
remote sensor.
Check the Remote Control Mode status.
The remote control system may not function when direct
sunlight or strong illumination strikes the remote control
sensor of the LCD monitor, or when there is an object in
the path.
"SCHEDULE"/"OFF TIMER" function is not working
properly
The "SCHEDULE" 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 when the power supply is
interrupted unexpectedly, then the "OFF TIMER" will be
reset.
Snowy Picture, Poor Sound in TV
Check antenna/cable connection. Use new cable if
necessary.
Interference in TV
Check components for shielding, move away from
monitor if necessary.
RS-232C or LAN control is not available
Check RS-232C or LAN cable connection.
Check "CONTROL" setting in "EXTERNAL CONTROL".
English-34

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