Troubleshooting; Use Case Studies - Lightware MMX4x2-HT200 User Manual

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9. Troubleshooting

9
T roubleshooting
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.
Link to connections/cabling section.
Link to device operation section.
Link to LDC software section.
LW2 Link to LW2 protocol commands section.
LW3 Link to LW3 protocol commands section.
MMX4x2 series – User's Manual
9.1. Use Case Studies
At first, check front panel LEDs and take the necessary steps according to their states. For more information
about status, LEDs refer to the
Symptom Root cause
No picture on the Device or devices are not
video output powered properly
Cable connection
problem
No incoming signal
TPS mode problem
Not the proper video port
is the active one
The output is muted
Display is not able to
receive the video format
HDCP is disabled
Not the desired Video output is set to
picture displayed test pattern (no sync
on the video screen) statically
output
Video output is set to
test pattern (no sync
screen) as there is no
picture on video source
Front Panel LEDs and Rear Panel LEDs sections.
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 (video and TPS cables).
If the SIGNAL LED of the input port does
not light, no signal is present. Check the
source device(s) and the HDMI/CATx
cable(s).
Check the actual TPS mode and the
selected modes of the extenders.
Check the video crosspoint settings.
Check the mute state of output port.
Check the emulated EDID; select another
(e.g. emulate the EDID of the display on
the input port).
Enable HDCP on the input and output
port.
Check Test Pattern settings in the HDMI
output properties.
Check video settings of the source.
85
Refer to
3.3.1
3.3
3.3
5.4.1
LW3 7.6.21
4.1.2
5.3
LW2 6.3.6
LW3 7.6.3
5.4.3
LW2 6.3.6
LW3 7.6.2
5.6
LW3 7.13
5.4
LW3 7.6.17
LW3 7.6.18
5.5.3
LW3 7.6.19