Sharp PN-L862B Operation Manual page 56

Troubleshooting
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
1/16 inch (2 mm) x 1/16 inch (2 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 26.)
When "AUTO DIMMING" is displayed.
• When the internal temperature of the monitor rises
excessively, the brightness of the backlight automatically
decreases in order to prevent a further temperature rise. If
you attempt to adjust the brightness while the monitor is in
this state, "AUTO DIMMING" is displayed and you cannot
change the brightness.
• 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.
56
E
Power LED is flashing in orange and blue alternately.
When "TEMPERATURE" is displayed in the corner of the
screen.
• 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, "TEMPERATURE" is
displayed on the screen and the Power LED flashes orange
and blue alternately.
• If the internal temperature rises further, the monitor
automatically enters standby state. (The Power LED
lighting orange.)
• 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.