Troubleshooting - Sharp PN-UH861 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.
• The power LED is off.
- Is power supplied to this monitor?
- Is the power cord disconnected? (See page 14.)
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.)
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly?
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?
Unstable video.
• The signal may be incompatible.
• Try the automatic screen adjustment when D-SUB is in
use.
The video from the HDMI input terminal does not appear
properly.
• Does the HDMI cable support 4K, and is it 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
34 and 35.)
• If the connected device does not support 4K, set "HDMI
Modes" to "Mode2".
The video from D-Sub input terminal does not appear
correctly.
• Is the setting for D-SUB correct?
• Is the input signal compatible with this monitor? (See page
34.)

Troubleshooting

Control buttons do not work.
There is no picture.
• Load noises from outside may be interfering with normal
When "AUTO DIMMING" is displayed.
• When the internal temperature of the monitor rises
• Remove the cause of the excessive temperature rise.
The monitor makes a cracking sound.
• You may occasionally hear a cracking sound from the
The Power LED is flashing in red and green alternately.
When "TEMPERATURE" is displayed in the corner of the
screen.
• When the internal temperature of the monitor rises
• If the internal temperature rises further, the monitor
• Remove the cause of the excessive temperature rise.
operation. Turn off the power and turn it on after waiting at
least 5 seconds, and then check the operation.
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.
monitor. This happens when the cabinet slightly expands
and contracts according to change in temperature. This
does not affect the monitor's performance.
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 red
and green alternately.
automatically enters standby mode. (The Power LED
continues flashing red and green alternately.)
- If the monitor enters standby mode due to a rise in
temperature, to return to normal display, turn the power off
and then back on again. The monitor, however, will enter
standby mode again if the cause of the temperature rise
is not eliminated. (See page 8.)
- 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.
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