Did this article help you? Please rate the post or leave a comment below. Thanks ;)
So I have been racking my brain trying to figure how to turn off DHCP on the Lexmark E120n.
Problem:
The Print Server Web Admin Tool that Lexmark provides is cr@p. Every time you disable DHCP the IP address changes to something like: 169.1.1.xx and in order to log back in to the control panel you either have to assign yourself a 169.1.1.xx address or restore to the factory settings/defaults.
Solution
I would recommend you just reset your printer to factory settings by:
- Turn off the Printer
- Unplug the Ethernet and/or USB cable
- Lift the front cover as if you were changing the toner
- Hold down the two buttons
- Turn on the printer (keep those fingers on those buttons!)
- After about 15/20 seconds you will see the ! LED light on, wait 3 seconds and let go
- If that fails search Lexmark's knowledge base: http://support.lexmark.com/cgi-perl/knowledgebase.cgi
Now lets give that printer a STATIC IP!
- Click the Big Button (with an arrow) 2 times
- It will then print 2 sheets. Take a look at the second sheet that is titled: "Ethernet 10/100" Find the IP address it should be something like: 192.168.1.48
- Open a Command Prompt or Terminal
- Type the Following: telnet 192.168.1.48 9000 (assuming that is the printers current IP address)

- Main Menu - Choose (Selection: 1) + Enter/return
- IP Address Configuration - Choose (Selection: 6) + Enter/return
- Choose (Selection: X) + Enter/return
- Main Menu - Choose (Selection: 8) + Enter/return + Y + Enter/return
More screen shots just in case you need more visuals:

And that is it. Please let me know if this helped you out: justindorfman at gmail dot com
Props to Jay (Lexmark Customer Service, India Call Center)




