11
Troubleshooting
The following table provides troubleshooting tips. 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 Icron Technologies’
Technical Support
for further assistance.
PROBLEM
CAUSE
SOLUTION
ALL LEDs are
OFF on the LEX
and/or REX.
1. The LEX and/or REX is not
receiving power from the
AC power adapter.
1. Ensure that the AC power adapter is properly
connected to the LEX and/or REX.
2. Check that the AC adapter is connected to a live
source of AC power. Check that the LEX and/or
REX Power LED is illuminated.
POWER LED is
ON, STATUS LED
is OFF.
1. The unit has malfunctioned
and requires re-programming.
1. Contact
Technical Support
for assistance.
Link LEDs on the
LEX and REX are
OFF.
1. There is no connection
between the LEX and REX
units.
1. Ensure that a crossover OM3 multimode fiber
optic cable of no more than 200m is connected
between the LEX and REX.
2. Connect a short fiber optic patch cable between
the LEX and REX. Recheck the link status. If the
LINK LED is now SOLID ON, the previous cable is
defective or not capable of supporting the link.
LINK LEDs on
the LEX and REX
are SOLID ON,
but the USB 2
and USB 3 LEDs
are OFF.
1. The host computer is not
powered on.
2. The LEX is not connected to a
computer.
3. The host computer does not
support USB Hubs.
4. The unit is malfunctioning.
1. Disconnect all USB devices from the REX.
2. Disconnect LEX from the host computer.
3. Disconnect AC adapters from LEX and REX.
4. Reconnect the LEX to the host computer.
5. Reconnect the AC adapters to the LEX and REX.
6. Check that the LEX and REX have enumerated as
USB hubs in Windows Device Manager, macOS
System Profiler or using “Isusb” command in a
Linux Terminal.
7. If the problem is not resolved, contact
Technical
Support
.
The USB 2 LED
is SOLID ON, but
the USB 3 LED is
OFF.
1. The LEX is not connected to a
USB 3 port.
2. The LEX is connected to the
host using a USB 2 cable.
3. The USB 3 cable connecting
the LEX to the host computer
is defective.
4. The host computer’s USB 3
controller has malfunctioned.
1. Ensure that the LEX is connected to a USB 3 port
on the host computer.
2. Ensure that the included USB 3.1 Gen 1 cable is
being used between the host computer and LEX.
3. Cold boot the host computer.
4. Replace the USB 3.1 Gen 1 cable with a different
cable.
5. If the problem is not resolved, contact
Technical
Support
.
