Use Cases - Lightware MMX4x2 Series User Manual

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9. Troubleshooting
9.1. Use Cases
At first, check front panel LEDs and take the necessary steps according to their states. For more information
about status LEDs, refer to the Front Panel LEDs
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.
Symptom Root cause
No picture on the Device or devices are
video output not 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
and Rear Panel LEDs sections.
Action
Refer to
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 devices.
LW3
Check the video crosspoint settings.
LW2
LW3
Check the mute state of output port.
LW2
LW3
Check the emulated EDID; select another
(e.g. emulate the EDID of the display on the
LW3
input port).
Applied firmware package: v1.6.0b19 | LDC software: v2.5.13b5
MMX4x2 series – User's Manual
Symptom
Not the desired
picture displayed
on the video
output
No audio is
present on output
3.3
3.2
2.4
2.5
5.5.1
7.6.22
2.4
5.4
6.4.6
7.6.4 HDMI output
signal contains no
5.4.3
audio
6.4.2
7.6.3
5.8
7.25.1
Root cause Action
HDCP is disabled Enable HDCP on the input and output port.
Video output is set to Check Test Pattern settings in the HDMI
test pattern (no sync output properties.
screen) statically
Video output is set to Check video settings of the source.
test pattern (no sync
screen) as there is no
picture on video source
Audio signal
Source audio volume is Check the audio settings of the source.
low or muted
Not the proper audio Check the audio crosspoint settings.
port is the active one
Input port is muted Check the input port properties.
Output port is muted Check the output port properties.
Analog audio volume is Check the Analog audio output port settings
set low (volume).
HDMI mode was set Check the properties of the output port and
to DVI set to HDMI or Auto.
DVI EDID is emulated Check the EDID and select an HDMI EDID to
emulate.
152
Refer to
5.5
LW3 7.6.18
LW3
7.6.19
5.8
LW3 7.6.20
LW3 7.6.20
5.4
LW2 6.4.6
7.8.1
LW3
7.8.2
5.5.2
LW3 7.7.1
5.5.3
LW2 6.4.3
LW3
7.6.3
5.5.6
LW3 7.8.8
5.5.3
LW3 7.6.21
5.8
LW3 7.25.1