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10
TROUBLESHOOTING THE USB 400 FO EXTENDER
PROBLEM CAUSE SOLUTION
Link LEDs on Sender unit
and Receiver unit are off.
There is no connection
between the Sender unit
and Receiver unit.
1. Ensure that a
multimode fi ber optic
cable with crossover is
connected between the
Sender and Receiver
units.
2. Connect a fi ber optic
crossover patch cord
between the Sender and
Receiver units. Recheck
operation of the system.
Link LED on Sender /
Receiver units are on,
Host LED on Sender/
Receiver units are off.
The host computer is not
powered on.
The Sender unit is
not connected to the
computer (when used
with the optional Sender
5VDC power supply).
The computer does not
support USB hubs.
The USB 400 FO is
malfunctioning.
1. Disconnect all
USB devices from the
Receiver unit.
2. Disconnect the Sender
unit from the computer.
3. Disconnect the
Receiver unit from the
5VDC power supply.
4. Reconnect the Sender
unit to the computer.
5. Reconnect the
Receiver unit to the
5VDC power supply.
6. In the Universal Serial
Bus controllers section of
Device Manager, check
that the USB 400 FO is
recognized as a “Generic
USB Hub”.