4K Compact Matrix
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 .
Change to another
HDMI cable which is 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
compliant with the out-
put resolution.
Cannot control the
device by control device
(e.g. a PC) through
RS232 port
Wrong connection
Check to ensure the
connection between the
control device and the
unit
Wrong RS232 commu-
nication parameters
Type in correct RS232
communication param-
eters: Baud rate:9600;
Data bit: 8; Stop bit: 1;
Parity bit: none
Broken RS232 port
Send it to authorized
dealer for checking.
Static becomes stronger
when connecting the
video connectors
Bad grounding
Check the grounding
and make sure it is
connected well.
Cannot control the
device by RS232 / IR
remote / front panel
buttons
The device has already
been broken.
Send it to authorized
dealer for repairing.
If your problem persists after following the above troubleshooting steps, seek
further help from an authorized dealer or our technical support team.
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