Accton Technology USB204A - Manual (Page 5)

5
Quick Installation Guide
2. Connect the Type-A end of the cable to one of the hub’s
downstream ports and the Type-B end to the USB device.
3. Check that the hub’s downstream port (green) LED is on. If
this LED is off, then follow the advice in the section
“Troubleshooting” to diagnose the problem.
Troubleshooting
The USB204A can be easily monitored through its indicators.
You should be able to quickly resolve any problem by following
the troubleshooting steps listed below. If you cannot solve the
problem, contact your Accton distributor for further assistance.
General Problems
Many problems and error conditions can be cleared by first
following these steps:
1. Ensure all upstream cables are properly connected and that
all upstream hubs and the host PC are powered on.
2. Be sure the host PC and hub are not in suspend mode by
pressing any key on the keyboard or moving the mouse.
3. Disconnect devices from the hub and reset the hub. To
reset the hub, simply unplug the uplink connection and then
plug it back in.
Uplink Port LED is Red
This indicates an overcurrent condition exists.
1. Disconnect devices on downstream ports 1 through 4 one
at a time until the LED turns green. The last device
disconnected is causing the overcurrent condition.
2. If the LED is still red with all devices removed, reset the hub
by unplugging the uplink connection and plugging it back in.
If the LED remains red the unit is defective and should be
replaced.
A Single Downstream Port LED is Off
The port has been disabled by the host PC. An overcurrent
condition may exist on the port, or the device driver identified a
problem with the device and turned the port off.
1. Disconnect the device. If the port LED does not turn on,
reset the hub. If the LED then turns on, you can reattach
the device.
2. If the LED does not turn on after the hub reset, you may
have to reboot the host PC.