NEC LCD4020, LCD4620 user manual Troubleshooting

Page 37

Troubleshooting

English

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 ÒghostÓ image of a previous image remains visible on the screen. Unlike CRT monitors, LCD monitorsÕ 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 colour 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).

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 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 speaker 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 ControlÕs batteries status.

¥Check if batteries are inserted correctly.

¥Check if the Remote Control is pointing at the monitorÕs 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 ÒSCHEDULEÓ function will be disabled when the ÒOFF TIMERÓ is set.

¥If the ÒOFF TIMERÓ function is enable and the power to the LCD monitor is turned off if the power supply is interrupted unexpectedly, then the ÒOFF TIMERÓ will be reset.

RS-232C is not working

¥Make sure the monitor is not in ÒEco StandbyÓ mode (see page 27).

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.

Either light vertical or horizontal stripes may appear, depending on the specific display pattern. This is no product fault or degradation.

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Contents MultiSync LCD4020 MultiSync LCD4620 TV Tuner IndexFCC Information Canadian Department of Communications Compliance StatementEnglish-1 Declaration Important InformationDisposing of your old NEC product Declaration of the ManufacturerSafety Precautions, Maintenance & Recommended Use Contents Control Panel Parts Name and FunctionsTerminal Panel Wireless Remote Control Handling the remote control Operating Range for the Remote ControlInstallation Attach Mounting Accessories Attaching Mounting AccessoriesInstalling and removing stand Ventilation RequirementsEnglish-11 Prevent TippingDetermine the installation location SetupInstall the remote control batteries Connect the supplied power cordAdjust the sound Switch on the power of all the attached external equipmentAdjust the screen See pages 24 Adjust the image SeeConnections Connecting a Personal ComputerBefore making connections Connect the LCD Monitor to a Personal ComputerConnect the LCD Monitor to Macintosh Connecting to a Macintosh ComputerEnglish-15 Connect the LCD Monitor to a Computer with a Digital Output Connecting with Digital Interface EquipmentEnglish-16 Connect the LCD Monitor to a DVD Player Connecting a DVD Player with component outEnglish-17 RCAConnecting a DVD Player with Scart out Connecting a DVD Player with Hdmi outEnglish-18 ScartConnect the LCD Monitor to a Stereo Amplifier Connecting to a Stereo AmplifierEnglish-19 Precautions when connecting the antenna Connecting to a TVEnglish-20 Basic Operation Power on and OFF ModesEnglish-21 Using Power Management Power IndicatorPicture Mode Information OSDEnglish-23 OSD On-Screen-Display ControlsEnglish-24 English-25 English-26 English-27 English-28 English-29 TV Tuner Scan ModeRecommendations Image Sticking of LCD PanelEnglish-30 Connect PC and LCD4020/LCD4620 English-31English-32 ConnectionEnglish-33 English-34 FeaturesTroubleshooting Product Specifications Specifications LCD4020English-36 English-37 Specifications LCD4620English-38 Pin AssignmentEnergy Saving Manufacturer’s Recycling and Energy InformationWeee Mark European Directive 2002/96/EC
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LCD4620, LCD4020, LCD4620 specifications

The NEC LCD4620 is a robust and versatile 46-inch LCD display designed to cater to the demanding needs of various commercial environments, including retail, control rooms, and corporate settings. This display is known for its blend of advanced features, reliability, and performance that make it an excellent choice for professional applications.

One of the standout features of the NEC LCD4620 is its impressive resolution. With Full HD capabilities of 1920 x 1080 pixels, the display delivers sharp and vibrant images, ensuring that content is presented with optimal clarity. This high resolution enhances visual experiences, making it ideal for presentations, advertising, and information sharing.

The technology behind the NEC LCD4620 includes a combination of advanced panel technology and backlighting. It utilizes an S-IPS (Super In-Plane Switching) panel, which provides wide viewing angles of up to 178 degrees both horizontally and vertically. This characteristic is vital in public spaces where audiences may view the screen from various angles. Additionally, the display boasts a high contrast ratio, which enhances uniformity and depth in color reproduction.

The NEC LCD4620 is equipped with multiple connectivity options, including HDMI, VGA, and DVI inputs, allowing seamless integration with diverse systems and sources. These connectivity options make it versatile for various applications, whether connecting to a computer, media player, or digital signage network. The inclusion of a built-in USB port also enables media playback directly from USB devices, making it user-friendly for quick and easy content updates.

Another critical feature of the NEC LCD4620 is its durability and reliability. Designed for continuous operation, it can function for extended periods without the risk of overheating, making it suited for 24/7 environments. The display features a robust cabinet that is both aesthetically pleasing and functional, ensuring long-lasting performance in high-traffic areas.

Moreover, the NEC LCD4620 incorporates advanced energy-saving technologies to reduce power consumption, aligning with modern energy efficiency standards. This not only lowers operational costs but also supports environmental sustainability initiatives.

In conclusion, the NEC LCD4620 is a powerful 46-inch LCD display that combines high resolution, remarkable viewing angles, versatile connectivity, and robust design. It is an ideal solution for businesses and organizations seeking reliable displays that enhance visual communication and customer engagement.
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