Lexmark Optra E312 User Manual page 89

If your printer lights look like
this in configuration mode:
76
Appendix B: Advanced troubleshooting
Then your printer:
USB Port Enabled setting is set to Auto, the factory default.
The Universal Serial Bus (USB) lets you connect a variety
of devices, i.e., a printer, to your computer with a single
cable.
• Do a brief button press to scroll through the settings (Off,
On, Auto) for this menu item.
• Do a double button press to scroll to the next menu item,
USB NPA Mode.
• Do a long button press to select and save a setting for
this menu. As the setting is saved, all operator panel
indicator lights remain on for approximately 2 seconds.
Turn off the printer to exit configuration mode.
Factory
Default
Auto