Guntermann & Drunck USB 2.0 Ranger 2204 - Manual (Page 10)

PROBLEM CAUSE SOLUTION
Link LED on LEX
unit is on, Host
LED on LEX unit
is off. • The host computer is not
powered on.
• The LEX unit is not connected
to the computer (when used
with the optional LEX AC
LEX AC adapter).
• The computer does not
support USB hubs.
• The Ranger 2204 is
malfunctioning.
1. Disconnect all USB devices from the REX unit.
2. Disconnect the LEX unit from the computer.
3. Disconnect the REX unit from the AC power
adapter.
4. Reconnect the LEX unit to the computer.
5. Reconnect the REX unit to the AC power
adapter.
6. In the Universal Serial Bus controller’s section
of Device Manager, check that the Ranger 2204
is recognized as a “Generic USB Hub”.
Ranger 2204
system was
working, but the
Host LED on LEX/
REX units are
suddenly blinking. • The REX unit is in suspend
mode. The operating system
may put the Ranger 2204
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 REX.
All LEDs on both
the LEX/REX units
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 Ranger 2204 is
malfunctioning.
1. Disconnect the Ranger 2204 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 Ranger 2204.
Connect the Ranger 2204 to the computer.
6. If the second device does not operate, the
Ranger 2204 may be malfunctioning.
Contact technical support for assistance.
7. If the second device operates properly, the
first device may not be compatible with
the Ranger 2204.
9