724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 13
Chapter 4: Troubleshooting
4. Troubleshooting
4.1 Problems/Causes/Solutions
Table 4-1. Problems/Causes/Solutions.
Problem
Cause
Solution
All LEDs on the local
The local unit is not
1. Make sure that the USB connection between the
unit are off.
receiving enough power
local unit and host computer is properly installed.
from the USB port or the
(optional) local unit AC
2. Move the USB connector to another USB port on the
adapter.
host computer.
All LEDs on the remote unit
The remote unit is not receiving 1. Make sure that the AC power adapter is properly
unit are off.
power from the AC adapter.
connected to the remote unit.
2. Check that the AC adapter is connected to a live source
of electrical power. Check that the remote unit power
LED is lit.
Link LEDs on the local unit
There is no connection between 1. Make sure that CAT5 cable is connected between
and remote unit are off.
the local unit and the
the local unit and the remote unit. CAT5 or better
remote unit.
UTP with a straight-through connector and no crossovers,
and 8-pin RJ-45 connectors are used at both ends.
2. If the CAT5 cable is defective, connect a short CAT5
patch cord between the local unit and the remote
unit to determine if the original CAT5 cable is defective.
Link LED on the local
1. The host computer is not
1. Disconnect all USB devices from the remote unit.
unit is on, Host LED on the powered on.
local unit is off.
2. Disconnect the local unit from the computer.
2. The remote unit is not
connected to the computer
3. Disconnect the remote unit from the AC power adapter.
(when used with the
optional local unit AC
4. Reconnect the local unit to the computer.
adapter).
3. The computer does not
5. Reconnect the remote unit to the AC power adapter.
support USB hubs.
6. In the Universal Serial Bus Controllers section of Device
4. The extender is
Manager, check that the extender is recognized as a
malfunctioning.
“Generic USB Hub.”
The extender units were
The remote unit is in
1. Recover/resume the operating system from suspend/
working, but the host LED suspend mode. The operating
standby mode (see your operating system’s
on the local/remote
system may put the extender
documentation).
units are suddenly blinking. in suspend mode when
the computer is put into a
2. Attach a USB device to the extender.
suspend/standby state or when
no USB devices are attached.
