Use Case Studies - Lightware MX2-4x4-HDMI20-CA User Manual

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11. Troubleshooting
11.1. Use Case Studies
Symptom Root cause
Device(s) not
powered properly
Cable connection
problem
No incoming
signal
Not the proper
video port is the
active one
No picture on the
Not the proper
video output
interface is the
active one
Output port is
muted
Display is not able
to receive the
video format
HDCP is disabled
No picture on the The source sends
video output + 4K signals, but the
signal error rate emulated EDID is
is high, HDMI2.0 not supported this
scrambling is resolution.
disabled, clock
rate is set 1:10
Action
Video signal
Check the matrix and the other devices if
they are properly powered; try to unplug and
reconnect them.
Cables must fit very well, check all the
connectors.
No video signal is present on the HDMI input
ports. Check the source device and the HDMI
cables.
Check the video crosspoint settings.
If the source/display has more connectors,
check if the proper interface is selected.
Check the mute state of output ports.
Check the emulated EDID and select another
(e.g. emulate the display's EDID on the input
port).
Enable HDCP on input port(s) of the matrix.
Check the emulated EDID and select another
(e.g. F139 EDID on the input port).
Applied firmware package: v1.7.0 | LDC software: v2.5.1b5
MX2-HDMI20 series – User's Manual
Refer to Symptom
4.3
4.3
4.3
3.1.1
No audio is present on
output
7.4
LW2 8.4
LW3 9.5.1
7.6
8.4.6
LW2
LW3 9.8.1
3.2.4
7.8
HDMI output signal
LW3 9.14 contains no audio
6.4.1
LW3 9.5.6
3.2.4
7.8
9.14
LW3
Root cause Action
Audio signal
Other audio port is Check the audio crosspoint
switched to the output settings.
Output port is muted Check the output port
properties.
Analog audio input: volume Check the Analog audio input
is set very low port settings (Volume).
Analog audio output: Check the Analog audio output
volume is set very low port settings (Volume).
HDMI mode was set to DVI Check the properties of the
output port and set to HDMI or
Auto.
DVI EDID is emulated Check the EDID and select an
HDMI EDID to emulate.
105
Refer to
3.1
7.4.1
8.4.5
LW2
LW3 9.7.1
3.2.3
7.6
8.4.6
LW2
9.8.1
LW3
3.2.2
7.5.1
LW3
9.7.2
3.2.3
7.6
LW3
9.11.2
3.2.3
7.6
LW3
9.9.1
3.2.4
6.6
LW3 9.14