10. Troubleshooting MMX8x4-HT series – User's Manual 172
Use Case Studies
Symptom Root cause Action Refer to
Video signal
No picture on the
video output
Device(s) not powered
properly
Check the matrix and the other devices if
they are properly powered; try to unplug
and reconnect them.
4.4
Cable connection problem
connectors.
5.1
No incoming signal No video signal is present on the HDMI
input ports. Check the source device and
the HDMI cables.
4.2.1
Not the proper video port
is the active one
Check the video crosspoint settings. 3.2.5
3.3.3
6.4
7.4.7
8.6.1
Not the proper interface is
the active one
connectors, check if the proper interface
is selected.
Output port is muted Check the mute state of the ports.
3.2.2
6.4.1
7.4.4
6.5.3
8.7.13
Display is not able to
receive the video format
Check the emulated EDID and select
on the input port).
3.2.3
6.10
8.8
HDCP is disabled Enable HDCP on input port(s) of the
matrix.
3.2.2
6.5.1
8.7.9
Symptom Root cause Action Refer to
Video signal
Image is
magenta
colored
was set
The sink expects RGB color spaced
proper signal type was set on the port
EDIDs and select another one or check
the colorspace settings on the sink
device.
6.5.1
8.7.20
Audio signal
No microphone
sound is present
on output
low.
Check the mic channel properties.
8.11.1
Microphone type is
condenser.
The condenser microphone needs
necessary for normal operation. Turn on
the phantom power.
Application of the phantom power can
cause a damage if dynamic or wireless
microphone is connected!
8.10.1.8
microphone.
Check the wiring of the microphone
cable.
12.14
The microphone item is
turned off.
Turn on the microphone.
Not the
corresponding
audio sounds
set on the crosspoint
Check the video crosspoint settings.
3.2.5
3.3.3
6.4
7.4.7
8.6.1
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