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Troubleshooting
The following table provides troubleshooting information. If further assistance is required,
contact a Crestron customer service representative.
DM-TX-4K-202-C or DM-TX-4K-302-C Troubleshooting
Problem
Video is not
displayed, but the
audio may be
heard.
Video is not
displayed.
The HDMI video is
intermittent.
The LAN
connection is
unresponsive.
The transmitter
cannot establish a
link to the device
that is connected
to the DM OUT
port. The DM link
status LED is off.
(DM-TX-4K-302-C
only) Analog audio
is not being heard
from the device
connected to the
AUDIO IN port.
Supplemental Guide — Doc. 7932B
Possible Cause(s)
The HDCP settings of one or more
DigitalMedia devices in the signal path do
not support the HDCP level of the source.
The display does not support the HDCP
level of the source.
The desired input may not be selected in
DMTool.
The HDMI cable connections are faulty.
The transmitter and another
DigitalMedia endpoint are both
connected to a DigitalMedia switcher.
The LAN port of the other endpoint is
also connected to an Ethernet switch.
The cable connections are faulty.
The EDID is not set to 2-channel audio.
The analog audio input is not
programmed properly in SIMPL Windows.
The volume is not set properly in DMTool
or in the SIMPL program for the
transmitter
Corrective Action
Ensure that the HDCP
settings of all DigitalMedia
devices in the signal path
support the HDCP level of the
source.
Ensure that the display
supports the HDCP level of
the source.
Ensure that Auto mode is
selected or that the desired
input is selected in DMTool.
Verify that each end of the
cable is connected properly.
When a DigitalMedia
endpoint is connected to a
DigitalMedia switcher, the
LAN port of the endpoint
cannot be connected to an
Ethernet switch. Disconnect
the LAN port from the
Ethernet switch.
Verify that each end of the
cable is properly connected. If
necessary, check the cable
terminations.
Set the EDID to 2-channel
audio.
Ensure that the analog audio
input is programmed properly
in SIMPL Windows.
Verify that the volume is
properly set for the
transmitter.
DM-TX-4K-202-C and DM-TX-4K-302-C • 11
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