Troubleshooting - Sharp PN-80SC5 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 18.)
• Make sure correct input mode is selected. (See page 23.)
• 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 16.)
• Are the batteries exhausted?
• Point the remote control unit toward the monitor's remote
control sensor. (See page 16.)
• Is the remote control operation in FUNCTION menu
enabled? (See page 30.)
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly? (See page 13.)
• Check the setting of BALANCE of AUDIO SETTINGS for
AUDIO menu. (See page 27.)
There is a picture but no sound.
• Is the sound muted? (See page 22.)
• Make sure the volume is not set to minimum. (See page
22.)
• Are audio cables connected properly?
• When AUDIO OUTPUT is set to VARIABLE in the OTHERS
menu, the speaker is muted. Check the setting. (See page
28.)
Unstable video.
• The signal may be incompatible. (See pages 37 to 38.)
• Try the automatic screen adjustment when D-SUB (PC)
(INPUT5) is used. (See page 29.)
The video from the HDMI input terminal does not appear
properly.
• 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
37 to 38.)
The video from D-sub input terminal does not appear
correctly.
• Is the input signal compatible with this monitor? (See page 37.)
Video color is strange.
• Is the PICTURE menu setting correct? You can execute
RESET to return to the factory default settings. (See page
26.)
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. (See page
18.)
• Turn on the monitor first before turning on the computer or
playback device.

Troubleshooting

Computer resolution changes automatically.
• If you turn the power switch off and then back on again
The touch panel does not respond.
• Is the USB cable connected properly?
• If you want to position the monitor further away than the
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,
• When two touch pens are used, it may not be possible to
The Power LED lights blue and orange alternately.
(Alternates rapidly at intervals of 0.5 seconds.)
• Hardware has a problem. Turn off the monitor and request
The Power LED lights blue and orange alternately.
(At intervals of 1 second.)
• High temperature inside the monitor.
The monitor makes a cracking sound.
• You may occasionally hear a cracking sound from the
connecting the computer with a graphic card, the resolution
may change to 640 x 480. The resolution changes back to
1920 x 1080 according to the following steps.
- Disconnect and connect the video cable.
- Press the DETECT button when the SCREEN
RESOLUTION is displayed. (For Windows)
- Reboot the computer.
USB cable will allow, extend the cable using a USB cable
with a repeater.
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.
5/16 inch (8 mm) x 5/16 inch (8 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.
write correctly.
- When touch pens are moved near each other.
- When a pen is held at an angle while writing.
repair from your SHARP dealer.
Remove the cause of the excessive temperature rise.
monitor. This happens when the cabinet slightly expands
and contracts according to change in temperature. This
does not affect the monitor's performance.
33
E