Compact Scaler Switcher
28
7. Troubleshooting & Maintenance
Problems
Causes
Solutions
Output
image
with
snowflake
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.
EDID management does
not work normally
The HDMI cable is broken
at the output end.
Change for another HDMI
cable which is in good
working condition.
There is a blank screen on
the display when switching
The
display
does
not
support the resolution of
the video source.
Switch again.
Manage the EDID data
manually to make the
resolution of the video
source
automatically
compliant with the output
resolution.
Static becomes stronger
when connecting the video
connectors
Bad grounding
Check the grounding and
make sure it is connected
well.
Cannot control the device
by control device (e.g. a
PC) through RS232 port
Wrong
RS232
communication parameters
Type in correct RS232
communication
parameters.
