Troubleshooting - Sharp PN-525U Operation Manual

Before calling for repair services, make sure following checks
for possible remedies to the encountered symptoms.
There is no picture or sound.
• Is the power cord disconnected? (See page 12.)
• Is the main power switch set to "OFF"? (See page 14.)
• Is the monitor in standby mode (the power LED illuminating
in orange)? (See page 14.)
• Make sure correct input mode is selected. (See page 15.)
• 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 13.)
• Are the batteries exhausted? (See page 13.)
• Point the remote control unit toward the monitor's remote
control sensor. (See page 13.)
• Is the menu display hidden or is operation disabled? (See
page 23.)
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly? (See pages 10 and
11.)
• Make sure audio cables for external speakers are
connected properly: left and right cables may be reversed
or one of the two cables may not be connected. (See page
11.)
• Check the setting of BALANCE for AUDIO menu. (See
page 18.)
There is a picture but no sound.
• Is the sound muted? (See page 15.)
• Make sure the volume is not set to minimum. (See page
15.)
• Is the PC audio cable (commercially available) connected?
(See page 10.)
• Are audio cables connected properly? (See page 10.)
• Is the audio signal input properly to the audio input terminal
corresponding to the selected video input terminal? (See
page 15.)
Unstable video.
• The signal may be incompatible. (See pages 10 and 34.)
• Try the automatic screen adjustment when the PC2 input
terminal or PC3 input terminals is used. (See page 22.)
PC1 or AV1 does not appear properly.
• Is the setting of DVI SELECT correct? (See page 19.)
• Is the input signal compatible with this monitor? (See pages
10 and 34.)
• Turn off the power to the connected equipment and then
turn the power on again.
• If the monitors are connected in a daisy chain, turn off the
power to all the monitors connected in a daisy chain and
then turn the power on again.
PC3 or AV2 does not appear properly.
• Is the setting of BNC SELECT correct? (See page 19.)
• Is the input signal compatible with this monitor? (See page
34.)
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E

Troubleshooting

Control buttons do not work.
There is no picture.
• Some kind of load noises from outside might interfere with
The input mode changes automatically.
• When the AUTO INPUT CHANGE is ON and no signal
Power LED flashes red.
"SERVICE CALL" appears in the corner of the screen.
• Hardware has a problem. Turn off the monitor and request
When "TEMPERATURE" is displayed.
• When the internal temperature of the monitor rises
The monitor sometimes makes a cracking sound.
• You may hear cracking sound from the monitor. This
■ Warning when temperature rises
• When the internal temperature of the monitor rises
• If the internal temperature rises further, the monitor
Solution:
• If the monitor enters standby mode due to a rise in
• Check whether the monitor is placed at a location where a
• Internal temperature rises quickly if dust accumulates inside
normal operation. Turn off the power and turn it on after
waiting at least 5 seconds, and then check the operation.
is present in a selected input mode, the AUTO INPUT
CHANGE automatically changes the selected mode to a
mode where a video signal is present. (See page 19.)
The input mode may change in the following cases:
- When a computer is in standby mode.
- When video play is stopped with a playback device.
repair from your SHARP dealer.
excessively, the brightness of the backlight decreases
in order to prevent high-temperature-related problems.
Remove the cause of the excessive rise in temperature.
(See the description below.)
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.)
temperature, to return to normal display, turn the main
power switch 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 9.)
quick rise in temperature is likely. Internal temperature rises
quickly if the vents on the monitor are blocked.
the monitor or around the vents. Remove dust if possible.
Ask Sharp dealer about removing internal dust.