Troubleshooting - AG Neovo SMQ-7501 User Manual

APPENDIX

5.4 Troubleshooting

Symptom
No picture is displayed
Interference displayed on the
display or audible noise is heard
Colour is abnormal
Picture is distorted with
abnormal patterns
Display image doesn't fill up the
full size of the screen
Can hear sound, but no picture
Can see picture but no sound is
heard
Some picture elements do not
light up
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)
Possible Cause
• 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.
Caused by surrounding electrical
appliances or fluorescent lights.
The signal cable is not connected
properly.
• The signal cable is not connected
properly.
• The input signal is beyond the
capabilities of the display.
The picture format is not set
correctly.
Improperly connected source signal
cable.
• Improperly connected source
signal cable.
• Volume is turned all the way
down.
• MUTE function is turned on.
• No external speaker connected.
Some pixels of the display may not
turn on.
A still picture is displayed for an over
extended period of time.
39
Remedy
1 Plug in the power cord.
2 Make sure the power switch is
switched on.
3 Connect a signal connection to
the display.
Move the display to another location
to see is the interference is reduced.
Make sure that the signal cable is
attached firmly to the back 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.
Press the 16:9 button and select a
suitable picture format.
Make sure that both video inputs
and sound inputs are correctly
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.
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.
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.