4X4 QuickMedia™ Matrix Switcher
Crestron
QM-MD4X4
Problem Solving
Troubleshooting
The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
QM-MD4X4 Troubleshooting
TROUBLE
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
Device is not
communicating with the
network.
Use Crestron Toolbox to poll
the network. Verify network
connection to the device.
Device is not receiving
power from a Crestron
power source.
Use the provided Crestron
power source. Verify
connections.
Device does not
function.
Device is not receiving
sufficient power.
Use the Crestron Power
Calculator to help calculate
how much power is needed
for the system.
PWR
LED does
not illuminate.
QM-MD4X4 is not
receiving power.
Verify that cables plugged
into the
NET
ports are
secure.
NET
LED does
not illuminate.
QM-MD4X4 Net ID is
not set to match the Net
ID of the SIMPL
Windows program.
Using Crestron Toolbox, poll
the network. Verify that the
Net ID for the QM-MD4X4 is
set to match the ID specified
in the SIMPL Windows
program.
Power is not supplied to
the
24/G
connector.
Apply sufficient power to the
24/G
connector.
Connected QM
devices are not
receiving power.
Faulty Cresnet wiring or
faulty Cresnet device.
Remove each Cresnet
connection on the affected
input or output until power is
restored to the remaining
devices.
Cables improperly
connected.
Verify that all cables are
secure.
Poor picture
quality.
Incorrect skew settings
in the QM-RMCRX-BA
device.
Use QM Tools software to set
correct skew settings for each
QM-RMCRX-BA in the
system.
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4X4 QuickMedia™ Matrix Switcher: QM-MD4X4
Operations Guide – DOC. 6546A
