User manual

11
TROUBLESHOOTING THE USB-400FO EXTENDER
PROBLEM CAUSE SOLUTION
Link LED on
Sender /Receiver
units are on, Host
LED on Sender/
Receiver units
are off.
(continued)
The USB-400FO is
malfunctioning.
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-
400FO is recognized as a
“Generic USB Hub”.
USB-400FO units
were working,
but the Host
LED on Sender/
Receiver units
are suddenly
blinking
The Receiver unit is
in suspend mode. The
operating system may
put the USB-400FO in
suspend mode when the
computer is put into a
Suspend/Standby state or
when no USB devices are
attached.
1. Recover/Resume the
operating system from
Suspend/Standby mode
(see your operating system’s
documentation).
2. Attach a USB device to the
USB-400FO.
All LEDs on both
the Sender unit
and Receiver
unit are on but
the USB device
does not operate
correctly, or is
detected as
an “Unknown
Device” in the
operating system.
The USB device is
malfunctioning.
The computer does
not recognize the USB
device.
The application software
for the device is not
operating.
1. Disconnect the USB-
400FO from the computer.
2. Connect the USB device
directly to the USB port on the
computer.
3. If the device does not
operate properly, consult the
user documentation for the
device.
4. Update your system
BIOS, chipset, or USB
Host controller drivers from
your System/Mother board
manufacturer’s website.
5. If the device operates
properly when directly
connected to the computer,
connect another device (of
a different type) to the USB-
400FO. Connect the USB-
400FO to the computer.