Sharp BT421 User Manual for the - Page 27

English 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. • Check the main Power Switch, it should be in the ON position. • Power Switches for the monitor and computer should be in the ON position. • 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 was lost. Press the power button on the remote control or press the power button on the monitor. • 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. 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 main Power Switch on 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, the image persistence of LCD 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. The image is unstable, unfocused or swimming is apparent • The signal cable should be completely attached to the computer. • Use the OSD Image Adjust controls to focus and adjust the 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 text looks garbled, change the video mode to noninterlaced and use a 60 Hz refresh rate. • The image may be distorted when turning the power on or changing the settings. LED on the monitor is not lit (no green or red color can be seen) • The power Switch should be in the ON position and the power cord should be connected. • Check the main Power Switch, it should be in the ON position. • Make certain the computer is not in a power-saving mode (touch the keyboard or move the mouse). • Check in the OSD that the power indicator option is set to ON. LED colors, except for green, are blinking or glowing • A certain failure might have occurred, please contact your supplier. • The monitor could be in standby. Press the power on button on the remote control or press the power button on the monitor. The image is not properly reproduced • Use the OSD Image Adjust controls to increase or decrease the coarse adjustment. • 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 card or system to change the resolution. 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. The Remote Control is not functioning • Check the batteries status of the Remote Control. • Check if the batteries are inserted correctly. • Check if the Remote Control is pointing at the remote control sensor of the monitor. • Check the status of IR LOCK SETTINGS. • The remote control system may not function when direct sunlight or strong illumination strikes the remote control sensor of the monitor, or when there is an object in the path. English-25