Sharp PN-LC862 Operation Manual page 55

The response of the touch panel 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
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 1/8 inch (3 mm) x 1/8 inch (3 mm), the touch may not
be detected by infrared and correct operation will not take
place.
• Do not touch the touch panel when turning on the monitor.
If you touch the touch panel, this may be detected as an
element failure in the infrared transmitter/receiver and
incorrect operation will result.
• Set the screen size to "Wide". (See page 28.)
The screen is dark.
• When the internal temperature of the monitor rises
excessively, the brightness of the backlight automatically
decreases in order to prevent a further temperature rise.
• Remove the cause of the excessive temperature rise.
The monitor makes a cracking sound.
• You may occasionally hear a cracking sound from the
monitor. This happens when the cabinet slightly expands
and contracts according to change in temperature. This
does not affect the monitor's performance.
Power LED is flashing in orange and blue alternately.
• When the internal temperature of the monitor rises
excessively, the brightness of the backlight decreases
automatically in order to prevent high-temperature-related
problems. When this occurs, the Power LED flashes
orange and blue alternately.
• If the internal temperature rises further, the monitor
automatically enters standby state. (The Power LED
flashes orange and blue alternately.)
• Remove the cause of the excessive temperature rise.
- If the monitor enters standby state due to a rise in
temperature, to return to normal display, turn the
power switch off and then back on again. The monitor,
however, will enter standby state again if the cause of the
temperature rise is not eliminated.
- Check whether the monitor is placed at a location where
a quick rise in temperature is likely. Internal temperature
rises quickly if the vents on the monitor are blocked.
- Internal temperature rises quickly if dust accumulates
inside the monitor or around the vents. Remove dust if
possible. Ask SHARP dealer about removing internal dust.
No sound is heard from the speaker.
Mic cannot be used.
Web camera cannot be used.
• Check if another device is connected via the USB or
Bluetooth.
• If more than one equivalent devices are connected, they
will be used in the following order:
Bluetooth > USB > Internal (speaker only)
• Remove unnecessary devices.
• The mic of the Bluetooth headset cannot be used. This
monitor does not support HSP/HFP.
• Is another application using the device?
The device may not work at the same time in multiple
applications. In this case, close the application.
• Do not switch the input mode while using the device.
The connection will change according to the input
mode switching, so speaker, mic or camera may not be
recognized correctly and may not operate.
In this case, turn this monitor or device power off and then
on.
The Bluetooth device cannot be connected.
The connection with the Bluetooth device is lost.
• Connect the USB extension cable (commercially available)
to the USB port for APPLICATION mode, and connect the
wireless adapter (supplied) to the USB extension cable
(commercially available). Place the wireless adapter
(supplied) where it can be seen from the front of this
monitor.
Troubleshooting
55
E