HP 310X - Manual (Page 155)

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