crwdns2934241:0crwdne2934241:0 at1105
crwdns2934249:0crwdne2934249:0:
I found the issue. Connecting the DIAG wire to ground while in external mode on the UART will prevent access to standby power. Disconnecting the ground restored power and I was able to proceed.
crwdns2915684:0crwdne2915684:0:
open