Scenario : You were given a second hand printer and you realize that it has a static IP address saved in memory but there are no embedded screen on the printer that would at least give you a way to change the settings.
Goal : You would like to change the static IP or remote the static IP (to use DHCP) so you can start using your printer.
Reset the printer to Factory Default (while the ethernet cable is attached).
The manufacturer of your printer should have that information in your printer’s manual.
Just GOOGLE that to find the steps