HP Jetdirect 250M User Manual page 200

Status OK? (Status light ON solid green?)
The Status light provides information on the state of the print server's
power connection and on its physical connection to the network. If all
connections are working correctly, the Status light should be ON solid
green (bright green in color and glowing continuously, not blinking). If
the connections are not working correctly, the Status light may be off,
blinking green, or blinking amber.
If your print server's Status light is ON solid green, click on the
Yes button below to return to the Troubleshooting Overview page and
continue with the next step in the troubleshooting procedure.
If your print server's Status light is not ON solid green, or if you
are not sure what to look for, click on the No button below to start
evaluating the status of the print server. Clicking the No button will also
give you information on where to find the Status light and what it looks
like.