USB DIRECTOR/4-PORT HUB
Symptom: All LEDs are off.
Cause: The hub has been disconnected, powered off, or put into suspend mode.
Solutions:
1.Host is in suspend mode. Press any key on the keyboard or move the mouse to exit suspend mode.
2.Upstream cable is disconnected. Reconnect.
3.Upstream hub or host is powered off. Make sure all upstream hubs are powered on.
Symptom: Power LED is on and all port LEDs are off.
Cause: The hub has not been enabled by the host.
Solutions:
1.USB driver not loaded. Reset the hub to cause the driver to be loaded.
To reset the hub, unplug its uplink connection and plug it back in.
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