You can use your machine's control panel to reset the print server to its default factory settings. This resets all information, such as the password and IP address.
MFC-J4335DW/MFC-J4345DW
Press Settings.
Press or to make your selections: Select [Network]. Press OK.
Select [Network Reset]. Press OK.
Press for two seconds to confirm. The machine restarts.
MFC-J4535DW
Press . The reset confirmation message is displayed. Press [OK] for two seconds. The machine will restart.