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User Guide
Chapter 4
Troubleshooting
USB Light
Light Behavior Description
Off USB is not operational. This is OK before the print server finishes starting
up. After startup completes, this could indicate a faulty print server.
On solid green USB is enabled and ready for use. This begins before the USB cable is
connected.
Blinking (green) Software fault occurred for the firmware. There is a valid USB device and
connections, but the device is not supported. Make sure the attached device
is a printer.
Blinking (amber) Might be a hardware fault (for example, a short-circuit, faulty cable, or a
printer drawing too much power).
To verify, disconnect the USB cable at the print server. Switch on the printer
if it is off. Power cycle the print server (unplug it and plug it back in). Then
reconnect the USB cable. If the USB light is now green and steady, then no
problem remains.
Otherwise, if the USB light is still blinking amber, then there may be a faulty
component. Try these steps to determine which component might be causing
the problem:
Detach the USB cable and power cycle the print server (unplug it and plug it
back in). If the USB LED is green and steady, then the print server is OK. If
it is blinking amber, then the print server is faulty.
Try reconnecting the USB cable to the print server only, and power cycle the
print server (unplug it and plug it back in). If the USB LED is green and
steady, then the cable is also OK. If it is blinking amber, then the cable may
be faulty.
Power cycle the printer and reconnect the USB cable to the printer. If the
USB LED is green and steady, then the printer is also OK. If it is blinking
amber, then the printer may be faulty.