Lexmark E320/E322 User Reference Manual page 73

What you can do:
•
Check that the Ethernet cable is still plugged into the
printer.
•
Print a test page to verify that the parallel buffer
setting or USB buffer setting is disabled (see
Parallel port enabled
Advanced Troubleshooting).
What this light sequence means when you press the
operator panel button with a double-button press from
the special function menu:
The printer has a service error and printing has stopped.
What you can do:
•
Turn the printer off and back on. If the lights are still
blinking, contact the place where you bought your
printer.
or USB port enabled
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