PCB version 2.1 can’t use firmware version old than V155-20180705 due to ROM device changed. The V1.55 3/23/2018 firmware code can’t program the new chip. You need to boot from a DOS bootable USB using the DOS arcflash utility to program the ROM code. Since the DOS works with filename with up to 8 characters, you may need to change the existing file name.
Tags: ARC-1883ix-16, firmware