Crestron
DM-RMC-100
DigitalMedia™ Room Controller, CAT
DM-RMC-100 Troubleshooting (Continued)
TROUBLE
POSSIBLE
CAUSE(S)
CORRECTIVE
ACTION
Verify ‘M’ cable
connection.
VIDEO
LED is
green but video
on connected
display is black.
HDCP is blanking
the video output.
If source is routed
through DM Switcher,
verify that there are
enough HDCP keys to
support all
destinations.
Verify ‘M’ cable
connections.
CNTRL
LED is
red.
Device is not
communicating
with an Ethernet
device.
If the device is in a
non-DHCP
environment, a default
IP address
(192.168.1.241) can be
assigned by holding
down its
SETUP
button
while applying power.
This IP address will
overwrite any previous
settings and will remain
until it is changed.
CNTRL
LED
flashes
red/green.
Device has
Ethernet link but
is not
communicating
with control
system.
Verify IP table entries
match control system.
Loss of
functionality due
to electrostatic
discharge.
Improper
grounding.
Check that all ground
connections have been
made properly.
NOTE:
For more advanced diagnostics, use the DM tool in Crestron
Toolbox.
Operations & Installation Guide – DOC. 6743-1F
Room Controller, CAT: DM-RMC-100
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