Troubleshooting - Sharp PN-70TB3 Operation Manual

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 17.)
• Is the monitor in standby mode (the power LED illuminating
in orange)? (See page 17.)
• Make sure correct input mode is selected. (See pages 24
to 25.)
• 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 39.)
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly? (See page 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 31.)
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 SETUP menu
correct? (See page 31.)
• Is the setting for SPEAKER SELECT of AUDIO OPTION on
the SETUP menu correct? (See page 31.)
Unstable video.
• The signal may be incompatible.
• Try the automatic screen adjustment when D-SUB1[RGB]
or D-SUB2 are used.
• If the top and bottom of the image are not horizontally
aligned, set TOUCH PANEL MODE on the MONITOR
menu to OFF.
The video from the HDMI input terminal does not appear
properly.
• Is the setting for HDMI1/HDMI2/HDMI3 of INPUT SELECT
on the SETUP menu correct? (See page 31.)
• 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 pages
62 to 63.)
The video from D-sub1 input terminal does not appear
correctly.
• Is the setting for D-SUB1 of INPUT SELECT on the SETUP
menu correct? (See page 31.)
• Is the input signal compatible with this monitor? (See page
62.)
The video from D-sub2 input terminal does not appear
correctly.
• Is the input signal compatible with this monitor? (See page
62.)
58
E

Troubleshooting

The video from DisplayPort input terminal does not
appear correctly.
• Is the input signal compatible with this monitor? (See page
• Is the DisplayPort cable DisplayPort standard compliant?
Control buttons do not work.
There is no picture.
• Load noises from outside may be interfering with normal
The input mode changes automatically.
• When CONNECT AUTO INPUT SELECT is ON, the input
• When the NO SIGNAL AUTO INPUT SEL. is ON and no
The touch panel does not respond.
• Is the USB cable connected properly? (Touch Panel
• Has Touch Panel Settings Tool been installed? (Touch
• Has the pen tip of the touch pen become worn? Replace
• When using an active pen, has Touch Pen Utility been
• When using an active pen, is the battery inserted in the
• When using an active pen, is the touch pen battery
The response of the touch screen is slow.
Some parts of the screen do not respond.
A different place is touched
• Is the screen exposed to direct sunlight or other strong
• Is there an obstacle between the infrared transmitter/
• Is the infrared transmitter/receiver dirty? Gently wipe off
• If the touch panel is touched with a small tip less than about
• When starting your computer or connecting the USB cable,
Power LED flashes red.
"STATUS [xxxx]" appears in the corner of the screen.
• Hardware has a problem. Turn off the monitor and request
62.)
The monitor will not work with cables that are not standard
compliant.
operation. Turn off the power and turn it on after waiting at
least 5 seconds, and then check the operation.
mode automatically changes to that terminal when a video
signal is input into the input terminal.
For this reason, the input mode may change when the
computer wakes up from system standby.
signal is present in a selected input mode, the monitor
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.
Settings Tool Operation Manual)
Panel Settings Tool Operation Manual)
the pen tip. (See page 19.)
installed? (Touch Pen Utility Operation Manual)
wrong orientation (+, -) in the touch pen? (See page 19.)
exhausted?
light? The touch panel uses infrared rays and thus may not
operate correctly.
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.
any dirt with a soft cloth.
3/16 inch (5.5 mm) x 3/16 inch (5.5 mm), the touch may not be
detected by infrared and correct operation will not take place.
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.
repair from your SHARP dealer.
(When STATUS ALERT is set to OSD & LED. This varies
depending on the setting.)