HP J6039C - JetDirect 200M Print Server User Manual page 55

Check the lights. When you plug the print server into the printer, the status light
should start blinking green as it executes the self-test. After the print server completes
the self-test, the light should continue to blink green as long as the network cable is not
plugged in. When you plug in the network cable, the status light should change to solid
green to indicate a valid network connection, or to intermittently flickering green to
indicate a valid network connection with network activity. In addition, one of the two
link lights (the "10" light or the "100" light) should come on solid green, to indicate the
speed of the network connection (10 or 100 megabits per second).