Use Case Studies - Lightware UMX-HDMI-140 Series User Manual

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9. Troubleshooting
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 Front View and
Symptom Root cause
No picture on the Device or devices are not
video output powered properly
Cable connection
problem
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 source is set to
Testpattern input (I6)
Video output is set to
test pattern (no sync
screen) as there is no
picture on video source
Rear View sections.
Action
Video signal
Check the switcher and the other devices
if they are properly powered; try to unplug
and reconnect them.
Cables must fit very well, check all the
connectors.
Check the mute state of output ports.
Check the emulated EDID; select another
(e.g. emulate the display's EDID on the
input port).
Enable HDCP on the input and output
port.
Check test pattern settings in the
properties of the input ports.
Check the crosspoint settings
Check video settings of the source.
Applied firmware package: v1.2.0 | LDC software: v2.4.1b7
UMX-HDMI-140 series– User's Manual
Refer to Symptom
No audio is
3.2.1
present on output
3.2
5.5.6
LW2 6.4.6
LW3 7.5.2
5.7
HDMI output
LW3 7.14
signal contains no
audio
5.5.2
5.5.6
LW3 7.5.17
LW3 7.5.18
CEC
5.5
communication
does not work
LW3
7.5.19
5.4
LW2 6.4.6
LW3 7.5.2
Connected serial
device does not
respond
Root cause Action
Audio signal
Source audio volume is Check the audio settings of the source.
low or muted
Analog audio input is Check the analog audio input port
muted properties
Output port is muted Check the output port properties.
HDMI mode was set to Check the properties of the output port
DVI and set to HDMI or Auto.
DVI EDID is emulated Check the EDID and select and HDMI
EDID to emulate.
CEC
Cable quality problem Check the pinout of the HDMI cabel. CEC
line could be missing in the low quality
HDMI cables.
CEC is not enabled in the Check the documentation of the device
third-party device and enable the CEC feature.
RS-232 signal
Cable connection Check the connectors to fit well; check
problem the wiring of the plugs.
RS-232 settings are Check the port settings of the switcher
different and the connected serial device(s).
RS-232 mode is not right Check the RS-232 mode settings (control,
command injection, or Event Manager
mode)
109
Refer to
5.5.4
LW2 6.4.6
LW3 7.7
5.5.7
LW2 6.4.6
LW3 7.6.2
5.5.6
LW3
7.5.22
5.7
LW3 7.14
3.2
3.2.9
5.8.1
LW3 7.9
5.8.1
LW3 7.9.2