UEH4002 User Manual
8
Link LED on
Local unit is
on, Host LED
on Local unit
is off.
The host
computer is not
powered on.
The Local unit is
not connected to
the computer
(when used with
the optional Local
AC adapter).
The computer
does not support
USB hubs.
The UEH4002 is
malfunctioning.
1. Disconnect all USB devices from the Remote
unit.
2. Disconnect the Local unit from the computer.
3. Disconnect the Remote unit from the AC
power adapter.
4. Reconnect the Local unit to the computer.
5. Reconnect the Remote unit to the AC power
adapter.
6. In the Universal Serial Bus controllers
section of Device Manager, check that the
UEH4002 is recognized as a “Generic USB
Hub”.
UEH4002
units were
working, but
the Host LED
on Local/
Remote units
started
blinking.
The Remote unit
is in suspend
mode. The
operating system
may put the
UEH4002 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 UEH4002.
All LEDs on
both the
Local unit
and Remote
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.
The UEH4002 is
malfunctioning.
1. Disconnect the UEH4002 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/
Motherboard manufacturer’s website.
5. If the device operates properly when directly
connected to the computer, connect another
device (of a different type) to the UEH4002.
Connect the UEH4002 to the computer.
6. If the second device does not operate, the
UEH4002 may be malfunctioning. Contact
technical support for assistance.
7. If the second device does operate properly,
the first device may not be compatible with
the UEH4002.
