Troubleshooting; Use Case Studies - Lightware MX2-8x8-HDMI20-L User Manual

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10. Troubleshooting

10
Troubleshooting
Usually, if the system seems not to transport the signal as expected, the best strategy for troubleshooting is to
check signal integrity through the whole signal chain starting from source side and moving forward to receiver end.
At first, check front panel LEDs and take the necessary steps according to their states. For more information
about front panel LEDs of the matrix see
Pictogram Legend
Section to connections/cabling.
Section to front panel operation.
Section to LDC software.
Section to LW2 protocol commands.
LW2
LW3 Section to LW3 protocol commands.
Product Overview section.
MX2-HDMI20 series – User's Manual
10.1. 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).
75
Refer to
3.4
3.4
3.4
4.2.1
6.4
LW2 7.3
LW3 8.4.1
6.6
7.3.6
LW2
LW3 8.8.1
4.3.4
6.8
LW3 8.13
6.4.1
LW3 8.5.6
4.3.4
6.8
8.13
LW3