AVG-UHD4K-88
8 Troubleshooting & Maintenance
Problems
Causes
Solutions
Color loss or no video
signal output
The connection cables
may not be connected
correctly or may be faulty
Check whether the cables
are connected correctly
and in good working
condition
Failed or loose connection
Make sure the connection
is firm
No output image when
switching
No signal at the input /
output end
Check with oscilloscope or
multimeter if there is any
signal at the input/output
end
Failed or loose connection
Make sure the connection
is good
Input source is with HDCP
while the HDCP
compliance is switched off.
Send command /%[x]:[1].
to change HDCP
compliance status.
The display doesn’t
support the input
resolution.
Switch to another input
source or enable the
display to learn the EDID
data of the input.
No audio output
The amplifier is not able to
decode HDMI audio
Change amplifier
Cannot control the device
via front panel buttons
Front panel buttons are
locked
Send command /%Unlock;
to unlock
Cannot control the device
via IR remote
The battery has run out
Change battery
The IR remote is faulty
Send it to an authorized
dealer for repairing
Beyond the effective range
of the IR signal or not
pointing at the IR receiver
Adjust the distance and
angle and point right at the
IR receiver.
Power Indicator remains
off when powered on
Failed or loose power
connection
Check whether the cables
are connected correctly
EDID management does
not work normally
The HDMI cable is broken
at the output end
Change for another HDMI
cable in good working
condition
There is a blank screen on
the display when switching
The display does not
support the resolution of
the video source
Switch again
Manage the EDID data
manually to make the
resolution of the video
source automatically
