9. Troubleshooting MMX2 series – User's Manual 110
Use Cases
Symptom Root cause Action Refer to
Video layer
No picture on the
video output
Device(s) not
powered properly
Check the switcher and the other devices if
they are properly powered; try to unplug and
reconnect them.
3.3
Cable connection
problem
connectors.
3.3
No incoming
signal
No video signal is present on the HDMI input
ports. Check the source device and the HDMI
cables.
3.3
Not the proper
video port is the
active one
Check the video crosspoint settings.
2.3.1
7.6.1
Not the proper
interface is the
active one
check if the proper interface is selected.
Output port is
muted
Check the mute state of output ports.
Display is not able
to receive the
video format
Check the emulated EDID and select another
(e.g. emulate the display’s EDID on the input
port).
HDCP is disabled Enable HDCP on input port(s) of the switcher.
7.6.12
No picture on the
video output +
signal error rate
scrambling is
rate is set 1:10
The source sends
emulated EDID is
not supported this
resolution.
Check the emulated EDID and select another
(e.g. F139 EDID on the input port).
LW3
working hard to provide the fastest support
possible. Our team’s response time is one of the
best in the industry, and in the toughest of cases
we can directly consult with the hardware or
software engineer who designed the product, to
get the information from the most reliable source.
However, the troubleshooting process can be even faster… with your help.
This information is the following:
▪
▪ Serial number(s) of the device(s) (it is either printed somewhere on the box or you can query it in the
Device Controller software or on the built-in website).
▪ Firmware versions of the devices (please note that there may be multiple CPUs or controllers in the
▪ Cable lengths and types (in our experience, it’s usually the cable).
▪ Patch panels, gender changers or anything else in the signal path that can affect the transmission.
▪ Signal type (resolution, refresh rate, color space, deep color).
▪
▪ Actions to take in order to re-create the problem (if we cannot reproduce the problem, it is hard for us
▪ Photo or video about the problem (‘image noise’ can mean many different things, it’s better if we see
it too).
▪ Error logs from the Device Controller software.
▪
software.
Support Team () to speed up the troubleshooting process.
AUDIO
OUT
OUT 2
HDMI USB-B
USB
CONTROL
SERVICE
IN 4
INPUT SELECT
HDMI USB-B
IN 3
SERVICE
USB-C USB-C
OUT1
VIDEO
IN 1 IN 2
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