You must use the keypad port, not the P3 port located next to the I/O. This document will explain how to flash a 590+ minor revision of firmware. To flash major revisions of firmware you must replace the control board.
21JUN2016 LS
13JUN19 JD
You must use the keypad port, not the P3 port located next to the I/O. This document will explain how to flash a 590+ minor revision of firmware. To flash major revisions of firmware you must replace the control board.