Troubleshooting - Sharp PN-85TH1 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 15.)
- Is the main power switch off? (See page 19.)
• The power LED lights orange.
- This monitor is in standby mode. Turn on the power. (See
page 19.)
• 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 16.)
• Are the batteries exhausted?
• Point the remote control unit toward the monitor's remote
control sensor. (See page 16.)
• Is the menu display hidden or is operation disabled? (See
page 43.)
• Do the remote control numbers on the remote control unit
and on the monitor match?
Check the numbers on INFORMATION. (See page 41.)
The remote control unit's buttons for operating the HDMI-
connected device do not work.
• When the input mode is APPLICATION, these buttons
operate the application in APPLICATION mode.
• Is HDMI CEC LINK set to AUTO under CEC SETTING on
the SETUP menu?
• Switch to a different input mode, and then try switching the
input mode back to HDMI.
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Are audio cables connected properly?
• 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
14.)
• Check the setting of BALANCE for AUDIO menu.
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 SELECT on the SETUP menu
correct?
• Is the setting for SPEAKER SELECT of AUDIO OPTION on
the SETUP menu correct?
54
E

Troubleshooting

Unstable video.
• The signal may be incompatible.
• Try the automatic screen adjustment when D-SUB is in use.
• If the top and bottom of the image are not horizontally
The video from the HDMI input terminal does not appear
properly.
• Does the HDMI cable support 4K, and is it HDMI standard
• Is the input signal compatible with this monitor? (See pages
• If the connected device does not support 4K, set HDMI
The video from D-Sub input terminal does not appear
correctly.
• Is the input signal compatible with this monitor? (See page
The video from the DisplayPort does not appear properly.
• Does the DisplayPort cable support 4K, and is it
• Is the input signal compatible with this monitor? (See page
• Does the video card support DisplayPort1.2?
Control buttons do not work.
There is no picture.
• Load noises from outside may be interfering with normal
The input mode changes automatically.
• When CONNECT AUTO INPUT SELECT is ON, the input
• When NO SIGNAL AUTO INPUT SEL. is ON and
aligned, set TOUCH PANEL MODE on the MONITOR
menu to OFF.
compliant? The monitor will not work with cables that are
not standard compliant.
56 and 57.)
MODES to MODE2.
56.)
DisplayPort standard compliant? The monitor will not work
with cables that are not standard compliant.
56.)
If it does not support DisplayPort1.2, set DisplayPort
STREAM to SST1.
operation. Turn off the main power and turn it on after
waiting at least 5 seconds, and then check the operation.
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 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.