HP 310X - Manual (Page 157)

Power/Status light blinking green
for HP Jetdirect 175x external print server/Internet connector for USB
and HP Jetdirect 310x external print server/Internet connector for
USB
The power/status light should be ON solid green to indicate that
print server power is OK and that the network cable is connected
properly to the print server. If the power/status light is blinking
green, please try the steps below and make changes as necessary.
Make sure that the network cable is connected securely to the
print server.
network cable
1.
Check that the network cable is plugged securely into the
hub/switch/router, and that the connection is set to the correct
network speed. 2.
Check that the LINK light is ON for the port on the
hub/switch/router to which the print server is connected. 3.
Your network cable may be faulty. Try a different cable. 4.
If the light still does not come on, try a different port on the
hub/switch/router. 5.
Is the power/status light now ON solid green?
If yes, click the Yes button to return to the Troubleshooting Overview
page and continue with the next step of the troubleshooting procedure.
If no, your print server has a problem that requires assistance from HP