AG Neovo PD-55Q 55" 4K Commercial Display - Manual (Page 85)

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APPENDIX
7.5 Troubleshooting
Symptom Possible Cause Remedy
No picture is displayed • The power cord has been
disconnected.
• The main power switch on
the back of the display is not
switched on.
• The selected input has no
connection.
• The display is in standby mode.
1 Plug in the power cord.
2 Make sure the power switch is
switched on.
3 Connect a signal connection to
the display.
Interference displayed on the
display or audible noise is heard
Caused by surrounding electrical
appliances or fluorescent lights.
Move the display to another location
to see is the interference is reduced.
Colour is abnormal The signal cable is not connected
properly.
Make sure that the signal cable is
attached firmly to the back of the
display.
Picture is distorted with
abnormal patterns
• The signal cable is not connected
properly.
• The input signal is beyond the
capabilities of the display.
• Make sure that the signal cable is
attached firmly.
• Check the video signal source
to see if it is beyond the range
of the display. Please verify its
specifications with this display’s
specification section.
Display image doesn’t fill up the
full size of the screen
The picture format is not set
correctly.
Press the button and select a
suitable picture format.
Can hear sound, but no picture Improperly connected source signal
cable.
Make sure that both video inputs
and sound inputs are correctly
connected.
Can see picture but no sound is
heard
• Improperly connected source
signal cable.
• Volume is turned all the way
down.
• MUTE function is turned on.
• No external speaker connected.
• Make sure that both video
and sound inputs are correctly
connected.
• Press the or button to hear
the sound.
• Switch the MUTE function off by
using the button.
• Connect the external speakers
and adjust the volume to a
suitable level.
Some picture elements do not
light up
Some pixels of the display may not
turn on.
This display is manufactured using
an extremely high level of precision
technology: however, sometimes
some pixels of the display may not
display. This is not a malfunction.
After-Images can still be seen
on the display after the display
is powered off. (Examples of
still pictures include logos, video
games, computer images, and
images displayed in 4:3 normal
mode)
A still picture is displayed for an over
extended period of time.
Do not allow a still image to be
displayed for an extended period of
time as this can cause a permanent
after-image to remain on the display.