HP 175X - JetDirect Print Server User Manual page 91

What is the state of the Power/Status light?
The behavior of the power/status
its physical connection to the network. If the power/status
green in color and either glowing continuously or flickering irregularly, then find its state in the list below
and click on it to continue troubleshooting.
for HP Jetdirect 175x external print server/Internet connector for USB
and HP Jetdirect 310x external print server/Internet connector for USB
light indicates the status of the print server's power connection and
OFF
Blinking green regularly
Blinking amber regularly
light on your print server is not ON, bright
©2000, 2001, 2002 Hewlett-Packard Company