ALF-MUH88TP-N
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11. Troubleshooting & Maintenance
Problems
Potential Causes
Solutions
Output image with
“snowflakes”.
Bad quality of connecting
cable.
Try a high-quality cable.
Failed or loose connection.
Ensure the connection is secured.
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.
Failed or loose connection.
Make sure the connection is good.
The product is damaged.
Contact an authorized dealer for
repairing.
POWER
indicator does not
work or no response to any
operation.
Power cord connection issue.
Ensure the power cord connection is
secured.
EDID management does not
work normally.
The HDMI cable is damaged at
the output end.
Change for another HDMI cable
which is in good working condition.
Static becomes stronger when
connecting the video
connectors.
Bad grounding.
Check the grounding and ensure it is
well connected.
Cannot control the device by
control device (e.g., a PC)
through RS232 port.
Incorrect RS232
communication parameters.
Type in correct RS232
communication parameters.
Damaged RS232 port.
Contact an authorized dealer for
inspection.
Cannot control the device via
the front panel buttons while
control through RS232 port is
possible.
The front panel buttons are
locked.
Send command
/%Unlock;
to unlock
the front panel buttons.
Note:
Should the issue persist after following the above troubleshooting steps, please
contact your local dealer or distributor for further assistance.
