Chapter 4: Troubleshooting
Table 4-1 (Continued). Problems/Causes/Solutions.
Problem | Cause | Solution | |
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| 1. Disconnect the extender from the computer. | |
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| 2. Connect the USB device directly to the USB port on the | |
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| computer. | |
| • The USB device is | 3. If the device does not operate properly, consult the user | |
All LEDs on both | malfunctioning. | ||
documentation for the device. | |||
the LEX unit and |
| ||
• The computer does not |
| ||
the REX unit are | 4. Update your system BIOS, chipset, or USB Host | ||
recognize the USB | |||
on, but the USB | controller drivers from your system/motherboard | ||
device. | |||
device does not | manufacturer’s Web site. | ||
| |||
operate correctly or | • The application software | 5. If the device operates properly when directly connected | |
is detected as an | |||
for the device is not | |||
to the computer, connect another device (of a different | |||
“Unknown Device” | |||
operating. | |||
type) to the extender to the computer. | |||
in the operating | |||
| |||
|
| ||
system. | • The extender is | 6. If the second device does not operate, the extender may | |
| malfunctioning. | ||
| be malfunctioning. Contact Black Box Technical Support | ||
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| ||
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| at | |
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| 7. If the second device does not operate properly, the first | |
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| device may not be compatible with the extender. | |
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USB device is attached to the REX USB port, but the REX device LED is off.
A USB device must have the appropriate driver installed on the computer operating system.
1.Install the required USB device driver on the computer operating system before attaching the USB device to the REX unit. See your USB device manufacturer’s Web 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).
| An overcurrent condition |
| |
Device LED is | has occurred because the |
| |
orange and units | USB device draws more | Power cycle the REX. | |
are no longer | power than can be | ||
| |||
functioning. | supplied per USB |
| |
| specification (500 mA). |
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Host and Link LEDs | Firmware mismatch | |
on the LEX/REX | ||
between the LEX and the | ||
units blink | ||
REX. | ||
intermittently. | ||
|
1.Use a different LEX/REX pair that has the same firmware revision.
2.Upgrade the LEX/REX firmware. Contact Black Box Technical Support at
Page 18 | IC401A User Manual | |
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