HDMI 4x4 Matrix Switcher User Guide
15
Troubleshooting and maintenance
When there is color loss or no video signal output, ensure that the cables are well
connected, or not broken.
When EDID management does not work normally, the HDMI cable may be broken
at the output end.
When switching, there is a blank screen on the display, the display may not
support the resolution of the video source. Switch again or manage the EDID data
manually to make the resolution of the video source automatically comply with the
output resolution.
When a user cannot control the switcher by computer through its COM port, check
the COM port number in the software. Make sure the COM port is in good
condition and the communication protocol is correct.
When switching and there is no output image:
Ensure there is a signal at the input and the output.
Ensure the output port number is the same as the controlled output port.
Ensure the input/output cables are not broken, or the connectors are loose. Try
another cable.
If the static becomes stronger when connecting the video/audio connectors, check
the grounding and make sure it is well connected, as it could damage the
switcher.
If you cannot control the switcher through the RS232 port, front panel buttons, or
the IR remote, the unit may be broken. Return it to the dealer for repair.
Summary of Contents for CM-MT4420-HD
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