Lexmark 4I3 - Manual (Page 120)

8. Press Load/Eject. As the printer begins to pull in the form,
release the form. The Ready indicator comes on, and printing
begins.
9. Wait for the printer to stop printing and the Ready indicator to go
off.
10. The lines numbered 1 through 9 should print as shown on the
sample printout, and the remainder of the printout should be
clear and readable.
1-98 User’s Guide