Sharp PN-L602B PN-L802B Professional LCD Monitor Operation Manual - Page 51
Troubleshooting - touch screen
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Troubleshooting If you are experiencing any problem with your display, before calling for service, please review the following troubleshooting tips. There is no picture or sound. • Is the power cord disconnected? (See page 14.) • Is the main power switch off? (See page 16.) • Is the monitor in standby mode (the power LED illuminating in orange)? (See page 16.) • Make sure correct input mode is selected. (See page 21.) • If any external equipment is connected, make sure the equipment is operating (playing back). Remote control does not work. • Are the batteries inserted with polarity (+,-) aligned? (See page 15.) • Are the batteries exhausted? • Point the remote control unit toward the monitor's remote control sensor. (See page 15.) • Is the menu display hidden or is operation disabled? (See page 31.) Sound from left and right speakers is reversed. Sound is heard from only one side. • Are audio cables connected properly? (See pages 12 to 13.) • Make sure audio cables for external speakers are connected properly: left and right cables may be reversed or one of the two cables may not be connected. (See page 13.) • Check the setting of BALANCE for AUDIO menu. (See page 25.) There is a picture but no sound. • Is the sound muted? • Make sure the volume is not set to minimum. • Are audio cables connected properly? • Is the setting of AUDIO SELECT on the OPTION menu correct? (See page 26.) • Is the setting of SPEAKER SELECT on the SETUP menu correct? (See page 26.) Unstable video. • The signal may be incompatible. • Try the automatic screen adjustment when the PC D-sub input terminal or PC RGB input terminals are used. • If the top and bottom of the image are not horizontally aligned, set TOUCH PANEL MODE on the OPTION menu to OFF. The video from the PC/AV HDMI input terminal does not appear properly. • Is the setting for HDMI of INPUT SELECT on the OPTION menu correct? (See page 26.) • Is the HDMI cable HDMI standard compliant? The monitor will not work with cables that are not standard compliant. • Is the input signal compatible with this monitor? (See page 55.) The video from the PC/AV DVI-D input terminal does not appear properly. • Is the setting for DVI of INPUT SELECT on the OPTION menu correct? (See page 26.) • Is the input signal compatible with this monitor? (See page 55.) • Turn off the power to the connected equipment and then turn the power on again. • If the monitors are connected in a daisy chain, turn off the power to all the monitors connected in a daisy chain and then turn the power on again. The video from PC D-SUB, PC RGB, AV COMPONENT, or AV VIDEO does not appear correctly. • Is the setting for BNC or D-SUB of INPUT SELECT on the OPTION menu correct? (See page 26.) • Is the input signal compatible with this monitor? (See page 55.) Control buttons do not work. There is no picture. • Load noises from outside may be interfering with normal operation. Turn off the power and turn it on after waiting at least 5 seconds, and then check the operation. The input mode changes automatically. • When the AUTO INPUT CHANGE is ON and no signal is present in a selected input mode, the AUTO INPUT CHANGE automatically changes the selected mode to a mode where a video signal is present. The input mode may change in the following cases: - When a computer is in standby mode. - When video play is stopped with a playback device. The touch panel does not respond. • Is the USB cable connected properly? (Touch Panel Driver Operation Manual) • Has the touch panel driver been installed? (Touch Panel Driver Operation Manual) • Has the pen tip of the touch pen become worn? Replace the pen tip. (See page 20.) • Is the battery inserted in the wrong orientation (+, -) in the touch pen? (See page 18.) • Is the touch pen battery exhausted? The response of the touch screen is slow. Some parts of the screen do not respond. • Is the screen exposed to direct sunlight or other strong light? Is a device that uses infrared being used nearby? The touch panel uses infrared rays and thus may not operate correctly. • Is there an obstacle between the sensor and the touch pen or your finger? An obstacle will prevent correct operation. If your fingers or a sleeve are too close to the screen, correct operation will not be possible. • Is the reflective surface dirty? Gently wipe off any dirt with a soft cloth. • If the touch panel is touched with a small tip less than about 3/8 inch (10 mm) x 3/8 inch (10 mm), the touch may not be detected by infrared and correct operation will not take place. • When starting your computer or connecting the USB cable, do not touch the touch panel. Power LED flashes red. "STATUS [xxxx]" appears in the corner of the screen. • Hardware has a problem. Turn off the monitor and request repair from your SHARP dealer. (When STATUS ALERT is set to OSD & LED. This varies depending on the setting.) 51 E