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9. Troubleshooting
HDMI-3D-OPT series – User's Manual
84
Symptom
Root cause
Action
Refer to
Audio signal
No audio is
present on output
Source audio volume is
low or muted
Check the audio settings of the source.
Audio input port is
muted
Check the audio input port properties
LW3
Audio output port is
muted
Check the output port properties.
LW2
LW3
Analog audio input:
volume is set very low
(TX)
Check the Analog audio input port
settings (Volume).
LW3
LW3
Analog audio output:
volume is set very low
(RX)
Check the Analog audio output port
settings (Volume).
LW3
LW3
HDMI output
signal contains no
audio
HDMI mode was set to
DVI
Check the properties of the output port
and set the signal type to HDMI or Auto.
LW3
DVI EDID is emulated
Check the EDID and select and HDMI
EDID to emulate.
LW3
RS-232 signal
Connected serial
device does not
respond
Cable connection
problem
Check the connectors to fit well; check
the wiring of the plugs.
RS-232 settings are
different
Check the port settings of the extender
and the connected serial device(s).
LW3
RS-232 mode is not right Check the RS-232 mode settings (control,
pass-through, or command injection)
LW3
Symptom
Root cause
Action
Refer to
Ethernet (only for SW4-OPT-TX240RAK)
No LAN
connection can be
established
Incorrect IP address is
set (fix IP)
Use dynamic IP address by enabling
DHCP option.
LW3
Restore the factory default settings (with
fix IP).
LW2
LW3
IP address conflict
Check the IP address of the other
devices, too.
USB KVM
USB device does
not operate
Cables are not
connected on both sides
Check the USB cable between TX and the
computer.
Not supported USB
device is connected
Keyboard, mouse (USB HID devices) are
supported mostly, check your device
type
USB crosspoint set to
the non-active channel
Check the USB mode in the transmitter
in LDC and change to the active channel.
Incorrect USB mode is
set
Check the USB mode in the receiver
in LDC and change to Composite or
Transparent mode.
GPIO
Connected device
does not respond
Cable connection
problem
Check the connectors to fit well; check
the wiring of the plugs.
Output level
cannot be changed
The direction of the
selected pin is set to
input
Check and modify the direction setting
of the desired pin
LW2
LW3
Miscellaneous
Front panel
buttons are out of
operation
Buttons are locked
Unlock the buttons
Error messages
received
continously
Different protocol is set
Check the port protocol settings (LW2
/ LW3) and use the proper protocol
commands.
LW3