NEC UN552S User Manual English - Page 96
Screen Image and Video Signal Issues
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Screen Image and Video Signal Issues No picture • The signal cable should be completely connected to the display card/computer. • The display card should be completely seated in its slot. • Check the main Power Switch, it should be in the ON position. • Make sure both the computer and monitor are powered on. • Make sure that a supported resolution has been selected on the display card or system being used. If in doubt, please refer to the user's manual of the display controller or system to change the resolution. • Check the monitor and your display card with respect to compatibility and recommended signal timings. • Check the signal cable connector for bent or pushed-in pins. • The monitor automatically goes into standby at the preset time period after the video signal is lost. Press the power on button on the remote control or press the button on the monitor. • Check the [DVI MODE] settings when a DVD player or computer equipment is connected to the DVI input. • If you unplug the signal cable when starting the computer, images may not be displayed. Turn off the monitor and the computer and then connect the signal cable and turn on the computer and the monitor. • Check the [OPTION POWER] setting when you use Option Board accessories. • Check for HDCP (High-bandwidth Digital Content Protection) content. HDCP is a system for preventing illegal copying of video data sent over a digital signal. If you are unable to view material via the digital inputs, this does not necessarily mean that the monitor is not functioning properly. With the implementation of HDCP, there may be cases in which certain content is protected by HDCP and might not be displayed due to the decision/intention of the HDCP community (Digital Content Protection, LLC). Snowy Picture, Black Screen in DVI input • Check the DVI MODE setting when a DVD player or computer equipment is connected to the DVI input. 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, the image persistence of monitors is not permanent, but single still image being displayed for a long period of time should be avoided. To alleviate image persistence, put the monitor into standby via remote control or turn the monitor's main power off 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 in standby or main power off for one hour to erase the image. NOTE: As with all personal display devices, NEC DISPLAY SOLUTIONS recommends displaying moving images, using a moving screen saver, or changing still images at regular intervals whenever the screen is idle, or turning it into standby or main power off of the monitor when not in use. The image is blinking • If you use a signal repeater or distributor or a long cable, this may cause image roughness or blink for a moment. In this case please connect the cable to the monitor directly without using a repeater or a distributor, or replace the cable with a higher quality cable. Using a twisted pair extender may cause image roughness depending on the environment where the monitor is in or the cable you are using. For further information please ask your supplier. • Some HDMI cables may not show a correct image. If input resolution is 1920 x 2160, 3840 x 2160 or 4096 x 2160, please use an HDMI cable which is approved to support 4K resolution. English−92