NCR NCR7454 manual Recovery Procedures, See the NCR 7454 Retail Terminal Hardware Service Guide

Chapter 5: BIOS Updating Procedures 5-5

Recovery Procedures

1.Connect the Parallel I/F Cable to the parallel (Customer Display) connector on the terminal.

RS-232
(Com 1) Customer	16993
Display

Note: The parallel connector on the 7454 terminal is used for the Customer Display. If the terminal is equipped with a Customer Display you must temporarily disconnect the display cable. If the terminal is not equipped with a Customer Display then it is likely that the terminal does not have a parallel connector and you will have to install the POS Connector Board.

See the NCR 7454 Retail Terminal Hardware Service Guide

(B005-0000-1342) for information how to open the terminal and install the POS Connector Board.