User Guide
7
Troubleshooting
The following table provides troubleshooting help. The topics are arranged
in the order in which they should be executed in most situations. If you are
unable to resolve the problem after following these instructions, please
contact technical support for further assistance (see page 11).
Symptoms/Cause
Remedy
All LEDs on LEX unit are
off.
Cause:
The LEX unit is not
receiving power from the
adapter
1. Ensure that a power adapter is connected
to the LEX unit.
2. Check that the adapter is connected to a
live source of electrical power.
All LEDs on REX unit are
off.
Cause:
The REX unit is not
receiving power from the
adapter
1. Ensure that a power adapter is connected
to the REX unit.
2. Check that the adapter is connected to a
live source of electrical power.
Link LEDs on LEX unit and
REX unit are off.
Cause:
There is no connection
between the LEX unit and
the REX unit.
1. Ensure that a fiber-optic cable with
crossover is connected between the LEX
unit and the REX unit.
2. Connect a short fiber-optic crossover
patch cord between the LEX unit and the
REX unit. Recheck the operation of the
system.
Link LED on LEX unit is on;
Host LED on LEX unit is off.
Cause:
a) The computer is not
functioning.
b) The LEX unit is not
connected to the
computer.
c) The computer does not
support USB hubs.
d) The USB Ranger is
malfunctioning.
1. Disconnect all USB devices from the REX
unit.
2. Disconnect the LEX unit from the
computer.
3. Disconnect and then reconnect the power
adapter to the USB Ranger.
4. Reconnect the LEX unit to the computer.
5. In the Universal Serial Bus controllers
section of Device Manager, check that
the USB Ranger is recognised as a
“Generic USB Hub”.
6. If the USB Ranger is not recognised,
contact technical support for assistance.
