Black Box IC400a manual If the second device does not operate properly, the first

4-Port CAT5 USB 2.0 Extender

Table 4-1 (Continued). Problems/Causes/Solutions.

Problem	Cause	Solution
All LEDs on both the	1. The USB device	1. Disconnect the extender from the computer.
local unit and the remote	is malfunctioning.
unit are on, but the USB		2. Connect the USB device directly to the USB port on the
device does not operate	2. The computer does not	computer.
correctly or is detected as an	recognize the USB device.
“Unknown Device” in the		3. If the device does not operate properly, consult the user
operating system.	3. The application software for	documentation for the device.
	the device is not operating.
		4. Update your system BIOS, chipset, or USB host controller
	4. The extender is	drivers from your system/motherboard manufacturer’s
	malfunctioning.	drivers from your system/motherboard manufacturer’s
		Web site.
		5. If the device operates properly when directly connected
		to a computer, connect another device (of a different
		type) to the extender. Connect the extender to the
		computer.
		6. If the second device does not operate, the extender may
		be malfunctioning. Contact Black Box Technical Support
		at 724-746-5500 or info@blackbox.com for assistance.
		7. If the second device does not operate properly, the first
		device may not be compatible with the extender.
A USB device is attached	A USB device must have the	1. Install the required USB device driver on the computer
to the remote unit USB	appropriate driver installed on	operating system before attaching the USB device to the
port, but the remote unit	the computer operating system.	remote unit. See your USB device manufacturer’s Web
device LED is off.		site for details.
		2. Consult your USB device documentation and power your
		USB device with the additional, USB device manufacturer
		supplied, power supply (if available).
Device LED is orange and	Overcurrent condition has	Power cycle the remote unit.
units are no longer	occurred because USB device
functioning.	draws more power than can
	be supplied per USB
	specification (500 mA).
LED Host and LINK LEDs	Firmware mismatch between	1. Use a different local unit and remote unit that have the
on local/remote units	the local unit and the remote unit.	same firmware revision.
blink intermittently.
		2. Upgrade the local unit/remote unit firmware. Contact
		Black Box Technical Support at 724-746-5500 or
		info@blackbox.com for assistance.

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