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EN Troubleshooting overview 191
If your print server’s USB light is not ON solid green, or if you are not sure what to look for,
continue with the following troubleshooting topics.
Note that the Jetdirect 310x print server does not support parallel-to-USB converters (for
connecting a parallel printer to a USB host)—it works with USB printers only. Make sure that the
cable is connected firmly to both the printer and the print server.
Check that both the printer and the print server are powered on.
After checking the items above and making any necessary changes, is the USB light now ON solid
green?
What is the state of the USB light?
The behavior of the USB light indicates the status of the USB connection. If the USB light on your
print server is not ON solid green, find the appropriate topic below to continue troubleshooting.
Is the USB light ON solid green?
Check the USB light on your print server. It should be ON solid green (bright green in color and
glowing continuously, not blinking). If it is not ON solid green, follow the troubleshooting steps
below.
Make sure that you have a USB cable connected between your printer and the USB port on the
print server. It should be a standard USB A-to-B cable, as shown below:
USB light OFF
If the USB light is OFF, it means that the print server’s USB connection is not operational. This is
OK before the print server finishes starting up (whether or not a USB cable is attached). If the light
remains OFF after startup, then the print server may be faulty.
Restart the print server by detaching the power cable and re-attaching it. Wait for the Power/Status
light to stop blinking (when the self-test finishes).
Is the USB light now ON solid green?
If yes, continue with Power/Status OK? (Power/Status light ON solid green?).
If no, your print server has a problem that requires assistance from HP Jetdirect technical support;
see the support flyer that came with your product for information on contacting HP.
USB light blinking green
If the USB light is blinking green, it indicates that the print server has detected a good connection
to a valid USB device, but the print server does not support the device. For example, this would
happen if you connected a USB digital camera to the print server.
This is not a fault, but rather an incompatibility between the print server and the connected device.
The HP Jetdirect 310x print server supports only USB printers (including USB multifunction
printers and All-in-One devices). It does not support non-printer USB devices, nor does it support
USB cable extenders, USB-to-parallel converters, or USB hubs.
Is the USB light now ON solid green?
If yes, continue with Power/Status OK? (Power/Status light ON solid green?).