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10. Troubleshooting & Maintenance
Problems
Potential Causes
Solutions
Output image with white
noise.
Bad quality of the
connecting cable.
Try another high-quality
cable.
Fail or loose connection.
Make sure the connection
is good
No output image when
switching.
No signal at the input /
output end.
Check with oscilloscope
or multimeter if there is
any signal at the input/
output end.
Fail or loose connection.
Make sure the connection
is good.
The switcher is broken.
Send it to authorized
dealer for repairing.
POWER
indicator doesn’t
work or no respond to any
operation.
Fail connection of power
cord.
Make sure the power cord
connection is good.
Cannot control the device
by control device (e.g. a
PC) through RS232 port.
Wrong RS232
communication
parameters.
Type in correct RS232
communication
parameters.
Broken RS232 port.
Send it to authorized
dealer for checking.
If your problem persists after following the above troubleshooting steps, seek further
help from authorized dealer or our technical support.