Operation Manual

31
E
Troubleshooting
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 13.)
- Is the main power switch off? (See page 14.)
- This monitor is in standby state. Turn on the power. (See
page 14.)
• The power LED lights orange.
- There is no input signal.
- Is an input mode selected that is appropriate for the input
terminal to which the cable is connected?
- If any external equipment is connected, make sure the
equipment is operating (playing back).
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.
• This monitor does not have integrated speakers.
Are audio cables connected properly?
• Is the sound muted?
• Make sure the volume is not set to minimum.
• In the case of HDMI2, is HDMI2 AUDIO SELECT in the
SETUP menu set to the audio input terminal?
Unstable video.
• The signal may be incompatible.
The video from the HDMI input terminal does not appear
properly.
• Is the input signal compatible with this monitor? (See pages
34 and 35.)
•
Is it HDMI standard compliant? The monitor will not work
with cables that are not standard compliant.
• 8K video does not appear properly.
- In the case of HDMI1, does the HDMI cable support 8K,
and is it conforming to the HDMI standard?
- In the case of HDMI2, does the HDMI cable support 4K,
and is it conforming to the HDMI standard?
Are all 4 cables identical?
- HDMI3 input terminal cannot be used to display 8K video.
•
4K video does not appear properly.
- Does the HDMI cable support 4K, and is it HDMI standard
compliant?
The video from the DisplayPort does not appear properly.
• Does the DisplayPort cable support 4K, and is it
DisplayPort standard compliant? The monitor will not work
with cables that are not standard compliant.
• Is the input signal compatible with this monitor? (See page
34.)
• Does the video card support DisplayPort1.2?
• DisplayPort input terminal can not be used to display 8K
video.
Control buttons do not work.
There is no picture.
• Load noises from outside may be interfering with normal
operation. Turn off the main power and turn it on after
waiting at least 5 seconds, and then check the operation.
The input mode changes automatically.
• When CONNECT AUTO INPUT SELECT is ON, the input
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.
•
When NO SIGNAL AUTO INPUT SEL. is ON and the
current video signal input stops, the input mode automatically
changes to the mode of an active video signal.
Consequently, the input mode may change even in the
following cases:
- When a computer enters standby mode.
- When video play is stopped with a playback device.
Power LED flashes red.
“STATUS [xxxx]” appears in the corner of the screen.
• Hardware has a problem. Turn off the monitor and request
repair from your SHARP dealer.
(When STATUS ALERT is set to OSD & LED. This varies
depending on the setting.)
Power LED flashes orange.
• When DYNAMIC RANGE EXPAND
is set to MODE3,
backlight luminance automatically decreases when white
area on the monitor becomes large.
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.
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
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. (When TEMPERATURE ALERT is
set to OSD & LED. This varies depending on the setting.)
• If the internal temperature rises further, the monitor
automatically enters standby state. (The Power LED
continues flashing red and green 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. (See page 7.)
- 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.