Read Sharp PN-L802B (serv.man12) User Guide / Operation Manual online
51
E
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.
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.
Click on the first or last page to see other PN-L802B (serv.man12) service manuals if exist.