Lexmark 4I3 - Manual (Page 259)

1. Turn the power Off (O).
2. Wait 10 seconds, then turn the power On (|).
3. If the printer displays this status code again, call for service.
7C PRINTER BOARD FAILURE
SEE USER'S GUIDE
7C1 PRINTER BOARD FAILURE
SEE USER'S GUIDE
7D PRINTER BOARD FAILURE
SEE USER'S GUIDE
7D1 PRINTER BOARD FAILURE
SEE USER'S GUIDE
7E PRINTER BOARD FAILURE
SEE USER'S GUIDE
7F PRINTER BOARD FAILURE
SEE USER'S GUIDE
7F1 PRINTER BOARD FAILURE
SEE USER'S GUIDE
Appendix B. Problems B-29