Sharp PN-L702B PN-L702B Professional LCD Monitor Operation Manual - Page 51

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? The touch panel uses infrared rays and thus may not operate correctly. • Is there an obstacle between the infrared transmitter/ receiver 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 infrared transmitter/receiver dirty? Gently wipe off any dirt with a soft cloth. • If the touch panel is touched with a small tip less than about 3/16 inch (4 mm) x 3/16 inch (4 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. If you touch the touch panel, this may be detected as an element failure in the infrared transmitter/receiver and incorrect operation will result. 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.) The touch panel power LED lights red. • Hardware has a problem. Turn off the monitor and request repair from your SHARP dealer. 51 E