HP Deskjet 5850 Color Inkjet Printer - Manual (Page 52)

ethernet lights
The printer's Ethernet lights indicate the status of the printer's Ethernet connection.
link light
The Link light is solid when the printer is connected to an Ethernet network and
powered on.
if the link light is... the printer is...
On
Connected to an Ethernet network and powered on.
The printer's wireless radio is disabled when a Ethernet
cable is connected to the printer.
Off
Not connected to an Ethernet network or powered off.
activity light
The Activity light flashes when the printer is receiving or transmitting data over the
Ethernet connection.
if the activity light is... the printer is...