Sharp PN-L752B

55
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 14.)
- Is the main power switch off? (See page 18.)
• The power LED lights orange.
- This monitor is in standby state. Turn on the power. (See
page 18.)
• The power LED flashes blue.
- There is no input signal.
- Is an input mode selected that is appropriate for the input
terminal to which the cable is connected? (See page 25.)
- 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 15.)
• Are the batteries exhausted?
• Point the remote control unit toward the monitor’s remote
control sensor. (See page 15.)
• Is operation disabled? (See page 50.)
The remote control unit’s buttons for operating the
HDMI-connected device do not work.
• Is the device connected to the HDMI1 input terminal?
HDMI2 input terminal and HDMI3 input terminal are not
supported.
• When the input mode is APPLICATION, these buttons
operate the application in APPLICATION mode.
• Is “HDMI CEC Link” set to on of “CEC Settings” on the “Input
& Output” menu?
• Switch to a different input mode, and then try switching the
input mode back to “HDMI1”.
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly?
• Check the setting of “Balance” from the Audio menu. (See
page 42.)
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?
• Is the setting of “Audio Output” of “Sound” on the Input &
Output menu correct?
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
59 and 60.)
• 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 input signal compatible with this monitor? (See page
59.)
The video from the USB Type-C does not appear properly.
• Is the input signal compatible with this monitor? (See page
59 and 60.)
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 “Auto Input Change” 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.
The touch panel does not respond.
• Is the USB cable connected properly?