Lexmark C734dn User Manual page 196

You need to know your printer model type and serial number. For more information, see the label on the inside top
front cover of the printer. The serial number is also listed on the menu settings page.
In the U.S. or Canada, call 1-800-539-6275. For other countries or regions, visit the Lexmark Web site at
http://support.lexmark.com.
Troubleshooting
196